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2012 Vol. 42, No. 10
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2012, 42(10): 1-4,77.
doi: 10.13204/j.gyjz201210001
Abstract:
Taking the planning and design of Chery Automobile R ＆ D Industrial Park for example,it was tried to start by the basic features of the auto industry platform sharing strategy, combine the park planning with the automotive industry,and display fully the beauty of the characteristics of the automobile industry park,but also reflects the green eco-environmental benefits and the humanistic spirit of businesses,thus striving to build the soft and hard environment of the park．
Taking the planning and design of Chery Automobile R ＆ D Industrial Park for example,it was tried to start by the basic features of the auto industry platform sharing strategy, combine the park planning with the automotive industry,and display fully the beauty of the characteristics of the automobile industry park,but also reflects the green eco-environmental benefits and the humanistic spirit of businesses,thus striving to build the soft and hard environment of the park．
2012, 42(10): 5-8.
doi: 10.13204/j.gyjz201210002
Abstract:
Industrial culture tourism is becoming the hot pot gradually as an emerging forms of economics.By emphasizing the exploitation and heritage of industrial culture in the development of industrial culture tourism of industrial park,acculturation of the industrial tourist attractions,as well as promotion of the tourist facilities and environment,the diversified pattern of development is forming.The Shangqiu Southeast Industrial Park has many demands of developing the industry of cultural tourism.During the process of industrial park space planning,people could make the coping strategies with respect to the industry selecting,landuse,road traffic system,landscape and the facilities based on the industrial cultural tourism positioning,attractions planning,circuit designing,environment creating and the service．
Industrial culture tourism is becoming the hot pot gradually as an emerging forms of economics.By emphasizing the exploitation and heritage of industrial culture in the development of industrial culture tourism of industrial park,acculturation of the industrial tourist attractions,as well as promotion of the tourist facilities and environment,the diversified pattern of development is forming.The Shangqiu Southeast Industrial Park has many demands of developing the industry of cultural tourism.During the process of industrial park space planning,people could make the coping strategies with respect to the industry selecting,landuse,road traffic system,landscape and the facilities based on the industrial cultural tourism positioning,attractions planning,circuit designing,environment creating and the service．
2012, 42(10): 9-13.
doi: 10.13204/j.gyjz201210003
Abstract:
By the introduction to Caofeidian Environmental Protection Industrial Park,the significance and profit of the environmental protection and the green ecology technique were analyzed,which could promote the use and expansion of the green industrial building design,and form gradually a new pattern of the industrial building design that would be helpful to the development of modern and future society．
By the introduction to Caofeidian Environmental Protection Industrial Park,the significance and profit of the environmental protection and the green ecology technique were analyzed,which could promote the use and expansion of the green industrial building design,and form gradually a new pattern of the industrial building design that would be helpful to the development of modern and future society．
2012, 42(10): 14-17.
doi: 10.13204/j.gyjz201210004
Abstract:
It was discussed the questions during the process of design for the Nokia Head Office.These questions included how to take full advantage of natural light and natural ventilation to cut down architectural cost with green architecture design methods on the basis of Beijing's climate conditions,and how to create comfortable artificial architecture microclimate with effective technology．
It was discussed the questions during the process of design for the Nokia Head Office.These questions included how to take full advantage of natural light and natural ventilation to cut down architectural cost with green architecture design methods on the basis of Beijing's climate conditions,and how to create comfortable artificial architecture microclimate with effective technology．
2012, 42(10): 18-20.
doi: 10.13204/j.gyjz201210005
Abstract:
Taking the design of the freight station of Kunming New Airport for example,it was illustrated the design ideas for a modern freight station in complicated mountain areas; and explored how to combine perfectly the process flow with customs supervision,terrain and modern air logistics,as well as display the green and fast air logistics advanced concept under condition of meeting the requirements of aviation logistics process flow,customs supervision and air freight,thus seeking for a fusion of the said items．
Taking the design of the freight station of Kunming New Airport for example,it was illustrated the design ideas for a modern freight station in complicated mountain areas; and explored how to combine perfectly the process flow with customs supervision,terrain and modern air logistics,as well as display the green and fast air logistics advanced concept under condition of meeting the requirements of aviation logistics process flow,customs supervision and air freight,thus seeking for a fusion of the said items．
2012, 42(10): 21-24.
doi: 10.13204/j.gyjz201210006
Abstract:
By analyzing the value of reuse of industrial buildings,the paper presents that connecting the creative industry with industrial heritages is the best way to protect and reconstruct old industrial buildings,continue the historic context,shape a city's image.As an important industrial base,Guangzhou retains many modern industrial heritages.Taking Taigu Warehouse for example,the paper analyzed its historical development,significance and current value,discussed the rejuvenation of creative industries and industrial heritages and pointed out that the revival of old industrial architectural heritages is a good continuation to the urban context．
By analyzing the value of reuse of industrial buildings,the paper presents that connecting the creative industry with industrial heritages is the best way to protect and reconstruct old industrial buildings,continue the historic context,shape a city's image.As an important industrial base,Guangzhou retains many modern industrial heritages.Taking Taigu Warehouse for example,the paper analyzed its historical development,significance and current value,discussed the rejuvenation of creative industries and industrial heritages and pointed out that the revival of old industrial architectural heritages is a good continuation to the urban context．
2012, 42(10): 25-29.
doi: 10.13204/j.gyjz201210007
Abstract:
Regional industrial heritage is the expression of industry context in a particular era as well as the culture display of specific technology clues and process.The preservation and redevelopment of industrial heritages include not only the inheriting of place's virtual nature such as the original industrial civilization and industrial spirits,but also the utilization of concrete architectural heritages.Takingclueas the entry point,this paper,by investigating the reconstruction of Hangzhou Oil Refinery Block,on one hand,from the perspective of virtual nature,discusses the significance of context,conduct and feedback clues to the construction of space; on the other hand,from a concrete point of view,explores the entity re-use preservation policies of carrier and module.What's more,by summarizing relative social instruction strategies,the paper can provide some specific reference for industrial heritage preservation in the future．
Regional industrial heritage is the expression of industry context in a particular era as well as the culture display of specific technology clues and process.The preservation and redevelopment of industrial heritages include not only the inheriting of place's virtual nature such as the original industrial civilization and industrial spirits,but also the utilization of concrete architectural heritages.Takingclueas the entry point,this paper,by investigating the reconstruction of Hangzhou Oil Refinery Block,on one hand,from the perspective of virtual nature,discusses the significance of context,conduct and feedback clues to the construction of space; on the other hand,from a concrete point of view,explores the entity re-use preservation policies of carrier and module.What's more,by summarizing relative social instruction strategies,the paper can provide some specific reference for industrial heritage preservation in the future．
2012, 42(10): 30-33.
doi: 10.13204/j.gyjz201210008
Abstract:
The old buildings of universities have witnessed the development of China ＇s higher education and the history of the universities.The rational transformation and utilization of them not only can save the resources but also can retain some traces of the development of the campus.Therefore,the protection and renovation of old buildings of universities brook no delay,which is an issue that architects must face.The aim of this study is to reconstruct and use the old buildings of the campus rationally from the adapting,updating and ecological perspective to make them start a new life cycle and realize their sustainable development．
The old buildings of universities have witnessed the development of China ＇s higher education and the history of the universities.The rational transformation and utilization of them not only can save the resources but also can retain some traces of the development of the campus.Therefore,the protection and renovation of old buildings of universities brook no delay,which is an issue that architects must face.The aim of this study is to reconstruct and use the old buildings of the campus rationally from the adapting,updating and ecological perspective to make them start a new life cycle and realize their sustainable development．
2012, 42(10): 34-37,46.
doi: 10.13204/j.gyjz201210009
Abstract:
Taking the renovation of workmen's village'life hall in Shenyang as an example,it was attempted to discuss the protection and utilization of the buildings of industrial heritage in workmen's villages.After the investigation and analysis,the project's orientation and planning concepts were put forward such asdrawersand living unit,then it was also introduced that this design preserves and displays the past various life elements of industrial workers,finally some design thoughts were summed up．
Taking the renovation of workmen's village'life hall in Shenyang as an example,it was attempted to discuss the protection and utilization of the buildings of industrial heritage in workmen's villages.After the investigation and analysis,the project's orientation and planning concepts were put forward such asdrawersand living unit,then it was also introduced that this design preserves and displays the past various life elements of industrial workers,finally some design thoughts were summed up．
2012, 42(10): 38-41.
doi: 10.13204/j.gyjz201210010
Abstract:
Reinforced concrete structures in service are usually with cracks and subjected to the service load,the hysteretic behavior of reinforced concrete structures with sustained eccentric loads and cracks needs to be investigated.The 28 d cured reinforced concrete columns with different sustained compressive eccentric loads were cured in the nature condition for 100 d,then their hysteretic behaviors were tested after the sustained loads were removed.Results showed that when the horizontal load produced the same tensile and compressive stress distribution as that of sustained eccentric load,the ultimate loads,ductility and initial stiffness of columns decreased with the increase of sustained eccentric loads.When the horizontal load was reverse,the ultimate loads showed an descend trend,while the initial stiffness and ductility increased with increase of sustained eccentric loads.The sustained eccentric loads had an impact on the hysteretic behavior of reinforced concrete columns．
Reinforced concrete structures in service are usually with cracks and subjected to the service load,the hysteretic behavior of reinforced concrete structures with sustained eccentric loads and cracks needs to be investigated.The 28 d cured reinforced concrete columns with different sustained compressive eccentric loads were cured in the nature condition for 100 d,then their hysteretic behaviors were tested after the sustained loads were removed.Results showed that when the horizontal load produced the same tensile and compressive stress distribution as that of sustained eccentric load,the ultimate loads,ductility and initial stiffness of columns decreased with the increase of sustained eccentric loads.When the horizontal load was reverse,the ultimate loads showed an descend trend,while the initial stiffness and ductility increased with increase of sustained eccentric loads.The sustained eccentric loads had an impact on the hysteretic behavior of reinforced concrete columns．
2012, 42(10): 42-46.
doi: 10.13204/j.gyjz201210011
Abstract:
A total of 15 concrete-filled glass fiber reinforced polymer(GFRP) tubular columns were tested and the specimens were divided into two groups.One group consisted of 6 specimens considering the eccentricity changes,the other consisted of 9 specimens considering the slenderness ratio changes.The test results showed that the eccentricity and slenderness ratio had great influence on mechanical properties of the concrete-filled GFRP tubular columns.With the increase of eccentricity,the destruction configuration of test specimens took place transformation from compression to tension failure gradually,and with the increasing of the slenderness ratio,the failure form of specimens changed from material damage to the instability destruction.The ultimate bearing capacity also decreased with the increasing of the eccentricity and slenderness ratio,but the amplitude of reducing slowed down.Based on the test data statistical regression,the reduction coefficient of the slenderness ratio and eccentricity of composite columns was obtained,and then the bearing capacity calculation formula of the axis pressure long columns and the eccentric-loaded columns was derived.The calculated results were compared with the experimental results,which showed a good agreement.These indicated that the proposed bearing capacity formula of the composite columns had a certain practical significance．
A total of 15 concrete-filled glass fiber reinforced polymer(GFRP) tubular columns were tested and the specimens were divided into two groups.One group consisted of 6 specimens considering the eccentricity changes,the other consisted of 9 specimens considering the slenderness ratio changes.The test results showed that the eccentricity and slenderness ratio had great influence on mechanical properties of the concrete-filled GFRP tubular columns.With the increase of eccentricity,the destruction configuration of test specimens took place transformation from compression to tension failure gradually,and with the increasing of the slenderness ratio,the failure form of specimens changed from material damage to the instability destruction.The ultimate bearing capacity also decreased with the increasing of the eccentricity and slenderness ratio,but the amplitude of reducing slowed down.Based on the test data statistical regression,the reduction coefficient of the slenderness ratio and eccentricity of composite columns was obtained,and then the bearing capacity calculation formula of the axis pressure long columns and the eccentric-loaded columns was derived.The calculated results were compared with the experimental results,which showed a good agreement.These indicated that the proposed bearing capacity formula of the composite columns had a certain practical significance．
2012, 42(10): 47-52.
doi: 10.13204/j.gyjz201210012
Abstract:
The hot rolled bar of fine grains 500 MPa is a new material which has high strength and good ductility.For promoting its application,through the flame test,the fire behavior of HRBF500 reinforced concrete beams was studied in fire,under the ISO834 standard fire curve.Considering the thermal properties of concrete and using ANSYS program,the transient temperature distribution within the cross-section of the concrete beams was studied at the high temperatures and the data were compared and analyzed with the experimental results.It was also conducted the vibrator test of four fine grain reinforced concrete beams after fire to study their dynamic properties.With different time under fire and when the beams were cooled to room temperature naturally,their self-resonant frequencies were investigated through the vibrator test.The results show that the self-resonant frequency of concrete beam is seriously affected by fire.Some conclusions are drawn out: The longer it is exposed to fire,the smaller is its self-resonant frequency.And also,the smaller is bar ratio,the bigger is its self-resonant frequency．
The hot rolled bar of fine grains 500 MPa is a new material which has high strength and good ductility.For promoting its application,through the flame test,the fire behavior of HRBF500 reinforced concrete beams was studied in fire,under the ISO834 standard fire curve.Considering the thermal properties of concrete and using ANSYS program,the transient temperature distribution within the cross-section of the concrete beams was studied at the high temperatures and the data were compared and analyzed with the experimental results.It was also conducted the vibrator test of four fine grain reinforced concrete beams after fire to study their dynamic properties.With different time under fire and when the beams were cooled to room temperature naturally,their self-resonant frequencies were investigated through the vibrator test.The results show that the self-resonant frequency of concrete beam is seriously affected by fire.Some conclusions are drawn out: The longer it is exposed to fire,the smaller is its self-resonant frequency.And also,the smaller is bar ratio,the bigger is its self-resonant frequency．
2012, 42(10): 53-57,88.
doi: 10.13204/j.gyjz201210013
Abstract:
In design the structural analysis is conducted to determine the internal forces of member,for unbraced structure the gravitational second-order effect due to structural sidesway and flexure of member must be considered, for braced structure the sidesway effect is not present.commonly,in the structural analysis only the internal forces at ends of member are found,and so the following problem must be solved,whether the flexural second-order effect will cause the moment at some section larger than the moment at ends.The flexural second-order effect for RC eccentrically compressed member was researched theoretically,the obtained results were compared with those of design code for RC structures．
In design the structural analysis is conducted to determine the internal forces of member,for unbraced structure the gravitational second-order effect due to structural sidesway and flexure of member must be considered, for braced structure the sidesway effect is not present.commonly,in the structural analysis only the internal forces at ends of member are found,and so the following problem must be solved,whether the flexural second-order effect will cause the moment at some section larger than the moment at ends.The flexural second-order effect for RC eccentrically compressed member was researched theoretically,the obtained results were compared with those of design code for RC structures．
2012, 42(10): 58-62.
doi: 10.13204/j.gyjz201210014
Abstract:
Based on experiment study of HRB400 high-strength reinforced concrete columns under compressingbending loads,the nonlinear finite element program ABAQUS was employed to simulate the tested columns.The influence of dilation angle,viscosity parameter and damage variable of concrete on the simulated results was studied systematically,also the influence of the reinforcement ratio and location of longitudinal high-strength steel bars on the seismic performance of columns.It was shown that dilation angle and viscosity parameter had great influence on the bearing capacity of the columns,and accounting the concrete damage variable could simulate the stiffness degradation of the columns better after yielding.The calculation results could agree with the tested results well by choosing the reasonable simulating parameters.Arranging high-strength steel bars in the centre location of bearing forces side the columns would present better seismic performance．
Based on experiment study of HRB400 high-strength reinforced concrete columns under compressingbending loads,the nonlinear finite element program ABAQUS was employed to simulate the tested columns.The influence of dilation angle,viscosity parameter and damage variable of concrete on the simulated results was studied systematically,also the influence of the reinforcement ratio and location of longitudinal high-strength steel bars on the seismic performance of columns.It was shown that dilation angle and viscosity parameter had great influence on the bearing capacity of the columns,and accounting the concrete damage variable could simulate the stiffness degradation of the columns better after yielding.The calculation results could agree with the tested results well by choosing the reasonable simulating parameters.Arranging high-strength steel bars in the centre location of bearing forces side the columns would present better seismic performance．
2012, 42(10): 63-66,125.
doi: 10.13204/j.gyjz201210015
Abstract:
A plastic-damage model for reinforced concrete frames was developed based on the classical plastic model and the continuum damage model.The plastic-damage constitutive law was implemented into a beam model for framed structures,in which these were described by elastic beams and columns with two inelastic hinges at their ends.A damage index useful in evaluating the state of structural members and a meaningful global damage index for whole structure were introduced.The plastic-damage model,together with the member and global damage indices,were adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions.Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given． The result indicates that the model has reliable accuracy．
A plastic-damage model for reinforced concrete frames was developed based on the classical plastic model and the continuum damage model.The plastic-damage constitutive law was implemented into a beam model for framed structures,in which these were described by elastic beams and columns with two inelastic hinges at their ends.A damage index useful in evaluating the state of structural members and a meaningful global damage index for whole structure were introduced.The plastic-damage model,together with the member and global damage indices,were adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions.Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given． The result indicates that the model has reliable accuracy．
2012, 42(10): 67-71,149.
doi: 10.13204/j.gyjz201210016
Abstract:
The damping makeup of cable-stayed bridges is complicated.It is a tough work to determine the damping matrices accurately.On the assumption of the damping coefficients of substructures in cable-stayed bridge (such as girder,tower,cable and support etc) are constant value and don't vary with frequency or vibration amplitude.An iteration method of damping coefficients and damping matrices estimation was presented.It was based on several known modal damping ratios,through the calculation of complex damped frequency and modal shape utilizing the state-space methodology.With the theory of non-proportional damping calculation of cable-stayed bridge, incorporating parameter sensitivity analysis and the least square optimization procedure,the damping coefficients of substructures were accurately determined,and the damping matrices were estimated with relatively high accuracy． Which provided a basis for setting up accurate finite element model of cable-stayed bridges．
The damping makeup of cable-stayed bridges is complicated.It is a tough work to determine the damping matrices accurately.On the assumption of the damping coefficients of substructures in cable-stayed bridge (such as girder,tower,cable and support etc) are constant value and don't vary with frequency or vibration amplitude.An iteration method of damping coefficients and damping matrices estimation was presented.It was based on several known modal damping ratios,through the calculation of complex damped frequency and modal shape utilizing the state-space methodology.With the theory of non-proportional damping calculation of cable-stayed bridge, incorporating parameter sensitivity analysis and the least square optimization procedure,the damping coefficients of substructures were accurately determined,and the damping matrices were estimated with relatively high accuracy． Which provided a basis for setting up accurate finite element model of cable-stayed bridges．
2012, 42(10): 72-77.
doi: 10.13204/j.gyjz201210017
Abstract:
Taking the Hanjiang Bridge pile foundation project of Xiamen-Shenzhen Passenger Dedicated Line as the background,static load model test was adopted to study the load-settlement and pile's stress ratio characteristics of vertical pile foundation and inclined pile foundation.The results showed that the load-settlement curve of the inclined pile foundation showed non-linear prior to the vertical pile foundation,and settlement of the inclined pile foundation was smaller than that of the vertical pile foundation at the early load phase.The pile's load sharing amount of the vertical pile foundation and the inclined pile foundation was increasing with the upper-load's adding,but the pile's load sharing ratio of the vertical pile foundation increased monotonically while that of the inclined pile foundation turned increasing first and then reducing.Affected by the pile spacing that increased from top to bottom,the masking effect of pile decreased at the lower part of the inclined pile foundation then the extrusion effect of soil was enhanced, which is the main reason of the different load-bearing characteristics of two sorts of different pile foundations．
Taking the Hanjiang Bridge pile foundation project of Xiamen-Shenzhen Passenger Dedicated Line as the background,static load model test was adopted to study the load-settlement and pile's stress ratio characteristics of vertical pile foundation and inclined pile foundation.The results showed that the load-settlement curve of the inclined pile foundation showed non-linear prior to the vertical pile foundation,and settlement of the inclined pile foundation was smaller than that of the vertical pile foundation at the early load phase.The pile's load sharing amount of the vertical pile foundation and the inclined pile foundation was increasing with the upper-load's adding,but the pile's load sharing ratio of the vertical pile foundation increased monotonically while that of the inclined pile foundation turned increasing first and then reducing.Affected by the pile spacing that increased from top to bottom,the masking effect of pile decreased at the lower part of the inclined pile foundation then the extrusion effect of soil was enhanced, which is the main reason of the different load-bearing characteristics of two sorts of different pile foundations．
2012, 42(10): 78-82.
doi: 10.13204/j.gyjz201210018
Abstract:
Based on the vertical-compressive load and uplift load test of four bored piles with same diameter and length in the same ground,the bearing capacity and displacement behavior of uplift piles and compressive piles in loess ground were discussed.The results indicated that the displacement of the uplift piles was large than that of the compressive piles.The lateral friction was weakened rapidly when the uplift load was large than 1 100 kN.The lateral friction on the upside of compressie pile rarely changed while that of the lower part increased rapidly.There was still deformation of 0. 2 mm on the ground at the place 3. 667 times pile's diameter away from the pile axis when the uplift load reached 2 900 kN．
Based on the vertical-compressive load and uplift load test of four bored piles with same diameter and length in the same ground,the bearing capacity and displacement behavior of uplift piles and compressive piles in loess ground were discussed.The results indicated that the displacement of the uplift piles was large than that of the compressive piles.The lateral friction was weakened rapidly when the uplift load was large than 1 100 kN.The lateral friction on the upside of compressie pile rarely changed while that of the lower part increased rapidly.There was still deformation of 0. 2 mm on the ground at the place 3. 667 times pile's diameter away from the pile axis when the uplift load reached 2 900 kN．
2012, 42(10): 83-88.
doi: 10.13204/j.gyjz201210019
Abstract:
It was introduced a project case concerning the ecological landscape shoreline repairing and the soft soil ground improvement of Shenzhen Gulf,in which through the field test of dynamic replacement,the law of change of rammed subsidence,the replacement depth and the growth and dissipation of pore water pressure were analyzed． Some valuable conclusions were obtained,and some suggestions were proposed on the follow-up field test in the dynamic replacement for the soft subsoil improvement．
It was introduced a project case concerning the ecological landscape shoreline repairing and the soft soil ground improvement of Shenzhen Gulf,in which through the field test of dynamic replacement,the law of change of rammed subsidence,the replacement depth and the growth and dissipation of pore water pressure were analyzed． Some valuable conclusions were obtained,and some suggestions were proposed on the follow-up field test in the dynamic replacement for the soft subsoil improvement．
2012, 42(10): 89-94.
doi: 10.13204/j.gyjz201210020
Abstract:
The nearest net distance between the Trust Edifice and Tianxiang Building is 0. 38 meters in complex environment,the excavation was deep and there were different excavation conditions.The bored cast-in-place pile with prestressed interior support were used according to the geological conditions and engineering period.The theoretical calculation of foundation design was carried out with Lizheng and FRWS software on the different profile and condition.The results proved that the excavation was safe.Through the whole construction and monitoring result, it was shown that the design was reasonable．
The nearest net distance between the Trust Edifice and Tianxiang Building is 0. 38 meters in complex environment,the excavation was deep and there were different excavation conditions.The bored cast-in-place pile with prestressed interior support were used according to the geological conditions and engineering period.The theoretical calculation of foundation design was carried out with Lizheng and FRWS software on the different profile and condition.The results proved that the excavation was safe.Through the whole construction and monitoring result, it was shown that the design was reasonable．
2012, 42(10): 95-100.
doi: 10.13204/j.gyjz201210021
Abstract:
Based on pull-out test of 20 reinforced concrete specimens with different corrosion rate,their failure patterns,r elationship between bonding strength and slippage,variation laws of bonding strength and slippage were studied,and calculating formula for the reduction coefficient of bonding strength and slip ratio was proposed.Based on which,constitutive model of bond-slip performance for corroded reinforced concrete was set up.Relative to other domestic and foreign constitutive models,the model which is efficient by confirmatory factor analysis is relatively resultful,and it is fit to be used in actual engineering items．
Based on pull-out test of 20 reinforced concrete specimens with different corrosion rate,their failure patterns,r elationship between bonding strength and slippage,variation laws of bonding strength and slippage were studied,and calculating formula for the reduction coefficient of bonding strength and slip ratio was proposed.Based on which,constitutive model of bond-slip performance for corroded reinforced concrete was set up.Relative to other domestic and foreign constitutive models,the model which is efficient by confirmatory factor analysis is relatively resultful,and it is fit to be used in actual engineering items．
2012, 42(10): 101-107.
doi: 10.13204/j.gyjz201210022
Abstract:
It was designed an experiment on semi-rigid horizontal force joints of pulley-clip supporting frame through three groups of specimens.By the analysis of experimental phenomena and data as well as the comparisons with joints rigidity of steel tubular scaffolding,following conclusions were obtained: the joints of pulley-clip supporting frame are typical semi-rigid connections,its semi-rigidity is little affected by the different erection distances; the fluctuation of initial connection stiffness of joints is slightly large,when the joint moment is lower than the 20 percent of the control moment; but with over 20 percent of the control moment,the connection stiffness tends towards to be steady; the connection stiffness of the three groups of specimens is equivalent to that of steel tubular scaffolding with tightening torque of 40 Nm,and the stability and erection quality of pulley-clip supporting frame is better than the traditional steel tubular scaffolding．
It was designed an experiment on semi-rigid horizontal force joints of pulley-clip supporting frame through three groups of specimens.By the analysis of experimental phenomena and data as well as the comparisons with joints rigidity of steel tubular scaffolding,following conclusions were obtained: the joints of pulley-clip supporting frame are typical semi-rigid connections,its semi-rigidity is little affected by the different erection distances; the fluctuation of initial connection stiffness of joints is slightly large,when the joint moment is lower than the 20 percent of the control moment; but with over 20 percent of the control moment,the connection stiffness tends towards to be steady; the connection stiffness of the three groups of specimens is equivalent to that of steel tubular scaffolding with tightening torque of 40 Nm,and the stability and erection quality of pulley-clip supporting frame is better than the traditional steel tubular scaffolding．
2012, 42(10): 108-112.
doi: 10.13204/j.gyjz201210023
Abstract:
In order to determine the bearing capacity of single arch support inner portalframe,experiments on the bearing capacity of single arch support portalframe and nonlinear FEM analysis of the bearing capacity of single arch support portalframe and single MF1219 portalframe were carried out.Models of single arch support portalframe and single MF1219 portalframe were set up using ANSYS software,their eigenvalue buckling analysis was done,and their bearing capacity was obtained.Loading in grades on top ends of two uprights or the corresponding positions of both ends of the arch strengthened rod of single arch support portalframe,in which low ends of two uprights were articulated,8 single arch support portalframes bearing capacity tests were conducted.Different portalframe bearing capacity formula in JGJ 1282010 Technical Code of Portal Steel Pipe Scalffold for Building Construction was selected,and the single arch support bearing capacity was calculated.After the results of FEM analysis,experiment and calculation of bearing capacity of single portalframe were contrasted,it was proposed that forces should act on top ends of two uprights,the bearing capacity of arch support portalframe for forces acted on top ends of two uprights could be calculated by the formula in 5. 2. 1-8a of JGJ 1282010,and the reduction coefficient of the bearing capacity of arch support portalframe for forces acted on top cross bar should be 0. 3．
In order to determine the bearing capacity of single arch support inner portalframe,experiments on the bearing capacity of single arch support portalframe and nonlinear FEM analysis of the bearing capacity of single arch support portalframe and single MF1219 portalframe were carried out.Models of single arch support portalframe and single MF1219 portalframe were set up using ANSYS software,their eigenvalue buckling analysis was done,and their bearing capacity was obtained.Loading in grades on top ends of two uprights or the corresponding positions of both ends of the arch strengthened rod of single arch support portalframe,in which low ends of two uprights were articulated,8 single arch support portalframes bearing capacity tests were conducted.Different portalframe bearing capacity formula in JGJ 1282010 Technical Code of Portal Steel Pipe Scalffold for Building Construction was selected,and the single arch support bearing capacity was calculated.After the results of FEM analysis,experiment and calculation of bearing capacity of single portalframe were contrasted,it was proposed that forces should act on top ends of two uprights,the bearing capacity of arch support portalframe for forces acted on top ends of two uprights could be calculated by the formula in 5. 2. 1-8a of JGJ 1282010,and the reduction coefficient of the bearing capacity of arch support portalframe for forces acted on top cross bar should be 0. 3．
INTRODUCTION TO PROPOSALS FOR INTERNATIONAL DESIGN COMPETITION FOR SHENZHEN UNIVERSIDE SPORTS CENTRE
2012, 42(10): 113-119,82.
doi: 10.13204/j.gyjz201210024
Abstract:
It was summarized special commenting-selecting,outstanding and final choose,and proposal modification from proposals of international design competition for Shenzhen Universide Sports Centre.The concept design was emphasized and introduced for challenge steel structure.The origin of design ideas was explained in simple words and arguments.The feasibility of the structure system was elaborated in most basic principle of structure mechanics ,and its marrow was also pointed out.Finally,the practical operations of the implemented scheme were introduced,such as structural test and research,design and construction,and evaluation of structure technique level etc．
It was summarized special commenting-selecting,outstanding and final choose,and proposal modification from proposals of international design competition for Shenzhen Universide Sports Centre.The concept design was emphasized and introduced for challenge steel structure.The origin of design ideas was explained in simple words and arguments.The feasibility of the structure system was elaborated in most basic principle of structure mechanics ,and its marrow was also pointed out.Finally,the practical operations of the implemented scheme were introduced,such as structural test and research,design and construction,and evaluation of structure technique level etc．
2012, 42(10): 120-125.
doi: 10.13204/j.gyjz201210025
Abstract:
Square expansive concrete-filled steel tubes (ECFT) are a sort of optimization design for concrete-filled steel tubes (CFT) .Tests on 18 eccentrically compressed square ECFT specimens were carried out.The mechanical behavior of the members under eccentrically compressed load was studied.The experimental results indicated that the ultimate strength of eccentrically compressed square ECFT columns with appropriate expansion agent was increased by 3% ～ 12% as compared with that of ordinary CFT columns.Moreover,the influences of the expansion agent, eccentricity ratio and width-thickness ratio on the behavior of eccentrically compressed square ECFT columns were also investigated.The achievements of the paper could be a reference for the design and the theory study of square ECFT members．
Square expansive concrete-filled steel tubes (ECFT) are a sort of optimization design for concrete-filled steel tubes (CFT) .Tests on 18 eccentrically compressed square ECFT specimens were carried out.The mechanical behavior of the members under eccentrically compressed load was studied.The experimental results indicated that the ultimate strength of eccentrically compressed square ECFT columns with appropriate expansion agent was increased by 3% ～ 12% as compared with that of ordinary CFT columns.Moreover,the influences of the expansion agent, eccentricity ratio and width-thickness ratio on the behavior of eccentrically compressed square ECFT columns were also investigated.The achievements of the paper could be a reference for the design and the theory study of square ECFT members．
2012, 42(10): 126-133.
doi: 10.13204/j.gyjz201210026
Abstract:
Static tensile loading experiment and nonlinear finite element analysis were carried out to study mechanical properties and failure modes of diaphragm-through joints of concrete-filled square steel tubular column.With comparison between experimental data and finite element analysis results such as load-displacement curves and bearing capacity,the feasibility of finite element analysis was proved.For diaphragm-through joints of concrete-filled square steel tubular column,it was found that tensile load from steel beam flange was mainly shared by square steel tube and diaphragm; as well as 3 failure modes which were steel beam flange fracture,weld fracture and joint broken.For steel square tube,plastic zone appeared around intersections between steel square tube and diaphragm． However,for diaphragm,plastic zone appeared along the cross-section lines enclosed by steel square tube．
Static tensile loading experiment and nonlinear finite element analysis were carried out to study mechanical properties and failure modes of diaphragm-through joints of concrete-filled square steel tubular column.With comparison between experimental data and finite element analysis results such as load-displacement curves and bearing capacity,the feasibility of finite element analysis was proved.For diaphragm-through joints of concrete-filled square steel tubular column,it was found that tensile load from steel beam flange was mainly shared by square steel tube and diaphragm; as well as 3 failure modes which were steel beam flange fracture,weld fracture and joint broken.For steel square tube,plastic zone appeared around intersections between steel square tube and diaphragm． However,for diaphragm,plastic zone appeared along the cross-section lines enclosed by steel square tube．
2012, 42(10): 132-136,52.
doi: 10.13204/j.gyjz201210027
Abstract:
Structure behavior of composite member depends largely on performance of shear connector.In this paper, shear connector formed by rectangular steel with two holes,applicable to composite beam in building structure,was presented.Failure modes and influences of the geometric dimensions on performance of the connector were studied and analyzed through eleven static push-out model tests,the geometric dimensions including height and thickness of the plate,diameters of the holes,and diameter of reinforcement bars through the holes and so on.It is shown that the proposed connector has good mechanical properties and is more economic,especially the ones with reinforced bars through the open holes have larger strength and better ductility．
Structure behavior of composite member depends largely on performance of shear connector.In this paper, shear connector formed by rectangular steel with two holes,applicable to composite beam in building structure,was presented.Failure modes and influences of the geometric dimensions on performance of the connector were studied and analyzed through eleven static push-out model tests,the geometric dimensions including height and thickness of the plate,diameters of the holes,and diameter of reinforcement bars through the holes and so on.It is shown that the proposed connector has good mechanical properties and is more economic,especially the ones with reinforced bars through the open holes have larger strength and better ductility．
2012, 42(10): 137-141.
doi: 10.13204/j.gyjz201210028
Abstract:
One typical brace-frame joint usually used in the high-rise steel structures was researched by the mechanics analysis and numerical analysis method in the paper.Based on the mechanics analysis,the defect of bearing capacity was discussed.Finite element analyses were conducted on 27 joints of various parameters influencing joints behavior,such as section width-to-height ratio,flange width-to-thickness ratio,and web depth-to-thickness ratio.Based on the result of the numerical analysis,the defect was verified.Finally an improvement measure was given．
One typical brace-frame joint usually used in the high-rise steel structures was researched by the mechanics analysis and numerical analysis method in the paper.Based on the mechanics analysis,the defect of bearing capacity was discussed.Finite element analyses were conducted on 27 joints of various parameters influencing joints behavior,such as section width-to-height ratio,flange width-to-thickness ratio,and web depth-to-thickness ratio.Based on the result of the numerical analysis,the defect was verified.Finally an improvement measure was given．
2012, 42(10): 142-145,94.
doi: 10.13204/j.gyjz201210029
Abstract:
RC column-steel beam structures system differed from mature architecture,used RC column as vertical member and lightweight steel beam as roof element with benefits of the structural systems relative to both the big span of gabled frames and the economy of RC structure.Based on material properties and mechanical characteristics, through a typical example,the structure arrangement,load value,model construction and the guideposts were discussed systematically．
RC column-steel beam structures system differed from mature architecture,used RC column as vertical member and lightweight steel beam as roof element with benefits of the structural systems relative to both the big span of gabled frames and the economy of RC structure.Based on material properties and mechanical characteristics, through a typical example,the structure arrangement,load value,model construction and the guideposts were discussed systematically．
2012, 42(10): 146-149.
doi: 10.13204/j.gyjz201210030
Abstract:
Based on the test results of three timber columns strengthened with CFRP and one contrast column without CFRP under eccentric loading,the load-bearing capacity,ductility and failure modes of the columns were compared and analyzed.combining the previous results,the calculating formula of the ultimate load-bearing capacity was presented.The theoretic results were well suited to the experiment results
Based on the test results of three timber columns strengthened with CFRP and one contrast column without CFRP under eccentric loading,the load-bearing capacity,ductility and failure modes of the columns were compared and analyzed.combining the previous results,the calculating formula of the ultimate load-bearing capacity was presented.The theoretic results were well suited to the experiment results
2012, 42(10): 147-152,161.
doi: 10.13204/j.gyjz201210031
Abstract:
Rectification and reinforcement of buildings are an unordinary task with demanding technique and high risk,and no independent theoretical systems have been constituted.To explore the mechanism and construction methods of rectification and reinforcement of buildings,it was outlined the design and construction of a multifunctional building of an elementary school as well as its inclination and damage.Engineering geological condition underneath the building was investigated,and the cause resulting in inclination was analyzed.The process of rectification through excavation as well as constructing and monitoring of reinforcement of silt clay under the foundation through grouting was demonstrated.Disposal of accident during the course of rectification and reinforcement was put forward.By rectification through excavation an reinforcement through grouting,the inclination rate of the building was corrected from 17 to 4,and sediment didn't propagate any longer．
Rectification and reinforcement of buildings are an unordinary task with demanding technique and high risk,and no independent theoretical systems have been constituted.To explore the mechanism and construction methods of rectification and reinforcement of buildings,it was outlined the design and construction of a multifunctional building of an elementary school as well as its inclination and damage.Engineering geological condition underneath the building was investigated,and the cause resulting in inclination was analyzed.The process of rectification through excavation as well as constructing and monitoring of reinforcement of silt clay under the foundation through grouting was demonstrated.Disposal of accident during the course of rectification and reinforcement was put forward.By rectification through excavation an reinforcement through grouting,the inclination rate of the building was corrected from 17 to 4,and sediment didn't propagate any longer．
2012, 42(10): 153-158,100.
doi: 10.13204/j.gyjz201210032
Abstract:
A number of brick chimneys have served for about 30 years.Due to their performance serious degradation and the relatively low level of construction,the normal safety of the brick chimneys is concerned in subsequent service life.So a damaged brick chimney was studied which had served for 30 years in an industrial building.According to the results of detection and analysis of related items such as actual size,inclination,crack,deformation and other important indexes,the serious ageing and the damage of brick chimney were discovered and cracks were the main diseases.The checking calculation of bearing capacity was done with analysis of ANSYS on the basis of measured data,the conclusions were drawn that bearing capacity was obviously insufficient at the bottom and security surplus was small in the upper part.And further the cause of disease was explained from the theoretical point of view． Reliability of the chimney was evaluated by the reliability factors.In view of existing security problems a reinforcement program of gluing flat steel reinforcement was made.And modal analysis was studied by ANSYS before and after reinforcement,so the difference of mechanical behavior was compared and analyzed.The results showed easy construction and low cost of the reinforcement method.Although the strengthened brick chimney had worked normally for 2 years,each performance was generally satisfactory．
A number of brick chimneys have served for about 30 years.Due to their performance serious degradation and the relatively low level of construction,the normal safety of the brick chimneys is concerned in subsequent service life.So a damaged brick chimney was studied which had served for 30 years in an industrial building.According to the results of detection and analysis of related items such as actual size,inclination,crack,deformation and other important indexes,the serious ageing and the damage of brick chimney were discovered and cracks were the main diseases.The checking calculation of bearing capacity was done with analysis of ANSYS on the basis of measured data,the conclusions were drawn that bearing capacity was obviously insufficient at the bottom and security surplus was small in the upper part.And further the cause of disease was explained from the theoretical point of view． Reliability of the chimney was evaluated by the reliability factors.In view of existing security problems a reinforcement program of gluing flat steel reinforcement was made.And modal analysis was studied by ANSYS before and after reinforcement,so the difference of mechanical behavior was compared and analyzed.The results showed easy construction and low cost of the reinforcement method.Although the strengthened brick chimney had worked normally for 2 years,each performance was generally satisfactory．
2012, 42(10): 159-161.
doi: 10.13204/j.gyjz201210033
Abstract:
A building was framed structure consisting of one undergound floor and three surface floors,whose total height was 15. 90 m,and total floor area being 7 800 m2 .An overall rising of its basement was produced and different degrees of damages occurred on partial concrete members due to continuous heavy rain after the completion of the basement．
A building was framed structure consisting of one undergound floor and three surface floors,whose total height was 15. 90 m,and total floor area being 7 800 m2 .An overall rising of its basement was produced and different degrees of damages occurred on partial concrete members due to continuous heavy rain after the completion of the basement．
2012, 42(10): 162-165.
doi: 10.13204/j.gyjz201210034
Abstract:
Design of industrial architecture should apply new theory,new technology and new material to create novel style under the precondition of fulfilling process requirements and presenting nature of an enterprise.Nowadays, design of architecture is developing from function focusing to aesthetic concentrating.The purpose of this paper is to provide reference for architecture design of iron and steel industry in China through analyzing and summarizing the building design of a 2 230 mm automobile plate cold rolling mill．
Design of industrial architecture should apply new theory,new technology and new material to create novel style under the precondition of fulfilling process requirements and presenting nature of an enterprise.Nowadays, design of architecture is developing from function focusing to aesthetic concentrating.The purpose of this paper is to provide reference for architecture design of iron and steel industry in China through analyzing and summarizing the building design of a 2 230 mm automobile plate cold rolling mill．
2012, 42(10): 166-170.
doi: 10.13204/j.gyjz201210035
Abstract:
Taking a project in Dalian for example,it was analyzed the characteristics and difficulties of the ground improvement in newly reclaimed complex karst areas,i t was proposed a the workable,more innovative composite foundation improvement method: composite foundation combined vibro replacement stone colunmn and plain concrete pile.The paper also introduced its application in a newly redaimed area with complex cavity．
Taking a project in Dalian for example,it was analyzed the characteristics and difficulties of the ground improvement in newly reclaimed complex karst areas,i t was proposed a the workable,more innovative composite foundation improvement method: composite foundation combined vibro replacement stone colunmn and plain concrete pile.The paper also introduced its application in a newly redaimed area with complex cavity．
2012, 42(10): 171-174,170.
doi: 10.13204/j.gyjz201210036
Abstract:
National ethnic minority villages in the Northwest Guangxi hardest hit by the fire,there are often a major fire and it is difficult to control.Lacking fire prevention of the suspended wooden building is one of the main reasons, this article describes the fire characteristics of the suspended wooden building,and other wood construction technology building fire measures,analysis the major restraining factors of setting routine fire prevention construction with the suspended wooden building,and proposed some fire prevention strategies of the fire reconstruction which adapt to the local suspended wooden building．
National ethnic minority villages in the Northwest Guangxi hardest hit by the fire,there are often a major fire and it is difficult to control.Lacking fire prevention of the suspended wooden building is one of the main reasons, this article describes the fire characteristics of the suspended wooden building,and other wood construction technology building fire measures,analysis the major restraining factors of setting routine fire prevention construction with the suspended wooden building,and proposed some fire prevention strategies of the fire reconstruction which adapt to the local suspended wooden building．
2012, 42(10): 175-179.
doi: 10.13204/j.gyjz201210037
Abstract:
When dealing with the complex structural model, the commercial finite element software is usually considered inefficient and can not be able to represent the engineering concepts well.According to BIM technology and its principles of information integration,as well as the data features of the complex structural model,a basic framework of the complex structural information model and its information integration process was built and analyzed respectively.Based on the collaborative computation concept of BIM technology and the representation format of IFC data model,a universal conversion platform was designed for the complex structural analysis model.Considering the features such as easy modeling and incorporating engineering concepts,the SATWE (a professional finite element analysis software focusing on tall-building with complex structural system) was selected to compare with ABAQUS (a commercial finite element analysis software) ,and a conversion program for structural analysis model between SATWE and ABAQUS was developed.Two projects in Shanghai including an international design center and a hotel expansion were used for the case study.The periods of four mode shapes of the conversion analysis model from SATWE to ABAQUS were calculated and compared with the test data,which show that the conversion program based on BIM technology can improve the modeling efficiency of complex structures of ABAQUS,and have the practicability and validity on the collaborative computation of the complex structures．
When dealing with the complex structural model, the commercial finite element software is usually considered inefficient and can not be able to represent the engineering concepts well.According to BIM technology and its principles of information integration,as well as the data features of the complex structural model,a basic framework of the complex structural information model and its information integration process was built and analyzed respectively.Based on the collaborative computation concept of BIM technology and the representation format of IFC data model,a universal conversion platform was designed for the complex structural analysis model.Considering the features such as easy modeling and incorporating engineering concepts,the SATWE (a professional finite element analysis software focusing on tall-building with complex structural system) was selected to compare with ABAQUS (a commercial finite element analysis software) ,and a conversion program for structural analysis model between SATWE and ABAQUS was developed.Two projects in Shanghai including an international design center and a hotel expansion were used for the case study.The periods of four mode shapes of the conversion analysis model from SATWE to ABAQUS were calculated and compared with the test data,which show that the conversion program based on BIM technology can improve the modeling efficiency of complex structures of ABAQUS,and have the practicability and validity on the collaborative computation of the complex structures．
