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2011 Vol. 41, No. 8
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2011, 41(8): 1-3,29.
doi: 10.13204/j.gyjz201108001
Abstract:
It was compared different economic growth models from the views of industrial planning and spatial construction under the background of ecological civilization.Taking Zizhao Environmental Industry Park in Weinan as a case,it was explored the industrial planning and spatial construction methods of environmental industry park.
It was compared different economic growth models from the views of industrial planning and spatial construction under the background of ecological civilization.Taking Zizhao Environmental Industry Park in Weinan as a case,it was explored the industrial planning and spatial construction methods of environmental industry park.
2011, 41(8): 4-7.
doi: 10.13204/j.gyjz201108002
Abstract:
In the light of the rapid progress of industrial parks,it is analysed the problems in the building process of industrial parks,and summed up the vitality moulding of industrial parks by using the research achievements in vitality moulding.It is put forward seven effective ways about the vitality moulding,which may provide reference for the healthy,high-efficient and orderly advance of industrial parks in some extent.
In the light of the rapid progress of industrial parks,it is analysed the problems in the building process of industrial parks,and summed up the vitality moulding of industrial parks by using the research achievements in vitality moulding.It is put forward seven effective ways about the vitality moulding,which may provide reference for the healthy,high-efficient and orderly advance of industrial parks in some extent.
2011, 41(8): 8-10.
doi: 10.13204/j.gyjz201108003
Abstract:
As the space carriers of industry,industrial park achieves mutual cooperation between industries by the full use of assembling effect of architecture.Taking Yantai GIS Industrial Park planning and design practice for example,this paper proposes the idea of community model to build industrial park space form and advocates the adoption of community-based organizations,space and transportation,as well as the variety of architecture and environmental design and other aspects,which are suitable for exploration and research on the planning strategy of green spirit;it is also pursued the integration and harmonious between people and the environment and shared resources in order to create sustainable development direction of modern industrial parks.
As the space carriers of industry,industrial park achieves mutual cooperation between industries by the full use of assembling effect of architecture.Taking Yantai GIS Industrial Park planning and design practice for example,this paper proposes the idea of community model to build industrial park space form and advocates the adoption of community-based organizations,space and transportation,as well as the variety of architecture and environmental design and other aspects,which are suitable for exploration and research on the planning strategy of green spirit;it is also pursued the integration and harmonious between people and the environment and shared resources in order to create sustainable development direction of modern industrial parks.
2011, 41(8): 11-13.
doi: 10.13204/j.gyjz201108004
Abstract:
The important significance of constructing Digital Caofeidian International Ecocity is firstly discussed.It is analysed the construction content of Digital Caofeidian.The implementation of the 1258 project completes the core of three levels of infrastructure,resource management and application services.Then it is also studied the construction mode of Digital Caofeidian,that is the one of integrating top-down government promotion model with bottom-up public participation model,thus forming its own characteristic interactive construction mode.Specialized organization ensures the smooth implementation of strategies and models.
The important significance of constructing Digital Caofeidian International Ecocity is firstly discussed.It is analysed the construction content of Digital Caofeidian.The implementation of the 1258 project completes the core of three levels of infrastructure,resource management and application services.Then it is also studied the construction mode of Digital Caofeidian,that is the one of integrating top-down government promotion model with bottom-up public participation model,thus forming its own characteristic interactive construction mode.Specialized organization ensures the smooth implementation of strategies and models.
2011, 41(8): 14-17.
doi: 10.13204/j.gyjz201108005
Abstract:
The industrial land couldn't be arranged dogmatically by wind rose,down the main wind-direction or up the minimum wind-frequency.The industrial land layout should lay vertically and occupy windward wind in the areas with only one rotate direction of wind.It should conform wind axis horizontally in the areas with two rotate directions of wind.It should consider wind speed in the areas that hasn't one rotate direction of wind.It should focus on distribution and keep the residential area away from the industrial land in the areas with no rotate direction of wind.
The industrial land couldn't be arranged dogmatically by wind rose,down the main wind-direction or up the minimum wind-frequency.The industrial land layout should lay vertically and occupy windward wind in the areas with only one rotate direction of wind.It should conform wind axis horizontally in the areas with two rotate directions of wind.It should consider wind speed in the areas that hasn't one rotate direction of wind.It should focus on distribution and keep the residential area away from the industrial land in the areas with no rotate direction of wind.
2011, 41(8): 18-21.
doi: 10.13204/j.gyjz201108006
Abstract:
Guangzhou which is an important industrial city of China played an important role in the history of modern industrial civilization.Through the pectination of industrial landscape heritage in Guangzhou,and based on the successful experience in protecting and reusing the domestic and foreign industrial architectural landscape heritages,it was analyzed the the current situation and existing problems of protecting and reusing industrial architecture landscape heritage in Guangzhou,and also proposed the countermeasures for reuse and protection of industrial architecture and landscape heritages in Guangzhou.
Guangzhou which is an important industrial city of China played an important role in the history of modern industrial civilization.Through the pectination of industrial landscape heritage in Guangzhou,and based on the successful experience in protecting and reusing the domestic and foreign industrial architectural landscape heritages,it was analyzed the the current situation and existing problems of protecting and reusing industrial architecture landscape heritage in Guangzhou,and also proposed the countermeasures for reuse and protection of industrial architecture and landscape heritages in Guangzhou.
2011, 41(8): 22-23,33.
doi: 10.13204/j.gyjz201108007
Abstract:
This paper takes Changsha North Railway Station in Hunan Province for example and launches the research by the qualitative and quantitative method.The research was carried on the investigation and survey on the field,the surveying drawings of present condition were drawn and many kinds of information were collected.Based on which the historic architectural heritages were analyzed scientifically;the countermeasures of preserving and development were researched.A conception planning and rejuvenation design for this example was carried out,in order to explore a mode of conservation and renovation for historic and industrial architectural heritages.
This paper takes Changsha North Railway Station in Hunan Province for example and launches the research by the qualitative and quantitative method.The research was carried on the investigation and survey on the field,the surveying drawings of present condition were drawn and many kinds of information were collected.Based on which the historic architectural heritages were analyzed scientifically;the countermeasures of preserving and development were researched.A conception planning and rejuvenation design for this example was carried out,in order to explore a mode of conservation and renovation for historic and industrial architectural heritages.
2011, 41(8): 24-29.
doi: 10.13204/j.gyjz201108008
Abstract:
Harbin is the important industrial base in China.Today,the city is facing the structural adjustment of the economical industry,as well as the renovation,transformation and development of period.In the period of the study and design for preservation,renovation and reutillization,the history background can not be ignored.Based on industrial building's actual conditions and history in Harbin,it is carried out a more detailed study and examination.So it is analysed the renovation and reutillization of industrial buildings,to search for their solutions to protection and reutillization methods.
Harbin is the important industrial base in China.Today,the city is facing the structural adjustment of the economical industry,as well as the renovation,transformation and development of period.In the period of the study and design for preservation,renovation and reutillization,the history background can not be ignored.Based on industrial building's actual conditions and history in Harbin,it is carried out a more detailed study and examination.So it is analysed the renovation and reutillization of industrial buildings,to search for their solutions to protection and reutillization methods.
2011, 41(8): 30-33.
doi: 10.13204/j.gyjz201108009
Abstract:
Through analyzing the distribution of economic structure,it is indicated the possibility and the importance of the energy-saving reform for the old coal-mining industrial buildings in Jixi and makes pointed out the practical significance in the process of reforming the surface of mining area.It is classified the old coal-mining industrial buildings and put forward specific techniques for energy-saving reform,which provides useful references for the energy-saving reform of the old coal-mining industrial buildings of old industrial base in Northeast China.
Through analyzing the distribution of economic structure,it is indicated the possibility and the importance of the energy-saving reform for the old coal-mining industrial buildings in Jixi and makes pointed out the practical significance in the process of reforming the surface of mining area.It is classified the old coal-mining industrial buildings and put forward specific techniques for energy-saving reform,which provides useful references for the energy-saving reform of the old coal-mining industrial buildings of old industrial base in Northeast China.
2011, 41(8): 34-37.
doi: 10.13204/j.gyjz201108010
Abstract:
To study anti-bending properties of self-compacting concrete dual-way slabs,six self-compacting and two corresponding ordinary concrete dual-way slabs of two different strength grade are made.The results show that:1) the experimental data of limit load of self-compacting concrete dual-way slabs are close to those of the ordinary concrete dual-way slab with same strength grade,and are obviously higher than their theoretical value;2) the load-deflection curves,the crack development and the broken shapes of the two kinds of dual-way slabs are basically the same;3) compared with ordinary concrete dual-way slabs,the cracks in self-compacting concrete dual-way slabs appear to be with smaller width and spread more evenly.Therefore,it is safe to design the self-compacting concrete dual-way slab according to the theory of ordinary concrete.
To study anti-bending properties of self-compacting concrete dual-way slabs,six self-compacting and two corresponding ordinary concrete dual-way slabs of two different strength grade are made.The results show that:1) the experimental data of limit load of self-compacting concrete dual-way slabs are close to those of the ordinary concrete dual-way slab with same strength grade,and are obviously higher than their theoretical value;2) the load-deflection curves,the crack development and the broken shapes of the two kinds of dual-way slabs are basically the same;3) compared with ordinary concrete dual-way slabs,the cracks in self-compacting concrete dual-way slabs appear to be with smaller width and spread more evenly.Therefore,it is safe to design the self-compacting concrete dual-way slab according to the theory of ordinary concrete.
2011, 41(8): 38-41,100.
doi: 10.13204/j.gyjz201108011
Abstract:
It is carried out the experiment of 4 different types of fly ash aeroconcrete blocks wall with restricting constructional columns under the cyclic loading,and the mechanical behaviors of this system such as failure characters,hysteretic behaviors and the data of the ductility are analyzed.It is shown that fly ash aeroconcrete blocks wall with restricting constructional columns at the boundary have good mechanical behaviors.
It is carried out the experiment of 4 different types of fly ash aeroconcrete blocks wall with restricting constructional columns under the cyclic loading,and the mechanical behaviors of this system such as failure characters,hysteretic behaviors and the data of the ductility are analyzed.It is shown that fly ash aeroconcrete blocks wall with restricting constructional columns at the boundary have good mechanical behaviors.
2011, 41(8): 42-45.
doi: 10.13204/j.gyjz201108012
Abstract:
Twelve concrete simple beams are made,the test of static load of the third point until failure being experienced and analysed,performances of the steels with different reinforcement ratios and reinforced concrete beams are studied.The results show that: load-deflection curve of BFRP reinforced concrete beam is almost a straight line,but still performs a better ductility at the late loading stage.Cracking load and ultimate load have not been significantly improved,but crack width can be controlled within 2.5 mm,and the crack spacing is decreased with the increase in reinforcement ratio.So better non-peeling BFRP rebars should be made to ensure adequate bond strength with the concrete.
Twelve concrete simple beams are made,the test of static load of the third point until failure being experienced and analysed,performances of the steels with different reinforcement ratios and reinforced concrete beams are studied.The results show that: load-deflection curve of BFRP reinforced concrete beam is almost a straight line,but still performs a better ductility at the late loading stage.Cracking load and ultimate load have not been significantly improved,but crack width can be controlled within 2.5 mm,and the crack spacing is decreased with the increase in reinforcement ratio.So better non-peeling BFRP rebars should be made to ensure adequate bond strength with the concrete.
2011, 41(8): 46-48.
doi: 10.13204/j.gyjz201108013
Abstract:
Taking the roof of the palace timber structure as the study object,it is studied the dynamic response of the roof by shaking table test and ANSYS numerical simulation,and obtained the maximal acceleration response under different conditions and the seismic amplification coefficient of the whole structure;at last,it is compared the results by shaking table test with those of the numerical simulation.Research shows that with the increase in action of earthquakes,the peak acceleration of the roof is growing and the seismic amplification coefficient of the whole structure is decreased,the seismic amplification coefficient by test is smaller than that by ANSYS simulation.The results reached provide a theoretical foundation and technical reference for seismic performance study of the ancient timber structure.
Taking the roof of the palace timber structure as the study object,it is studied the dynamic response of the roof by shaking table test and ANSYS numerical simulation,and obtained the maximal acceleration response under different conditions and the seismic amplification coefficient of the whole structure;at last,it is compared the results by shaking table test with those of the numerical simulation.Research shows that with the increase in action of earthquakes,the peak acceleration of the roof is growing and the seismic amplification coefficient of the whole structure is decreased,the seismic amplification coefficient by test is smaller than that by ANSYS simulation.The results reached provide a theoretical foundation and technical reference for seismic performance study of the ancient timber structure.
2011, 41(8): 49-54,73.
doi: 10.13204/j.gyjz201108014
Abstract:
Based on the study of seismic design of viscous dampers short-leg shear walls structure,it is summarized and improved the installment location and traditional calculation methods.It is put forward the method of distributing damping coefficient according to the direct ratio of damping force and floor shear,and also adopted the idea of accumulation to realize more accurate calculation of additional damping ratio needed in the structure.Combining real cases,and through comparison of designs,the paper has built finite element models and performed time-history analysis for common shear wall structure,short-leg shear wall structure,short-leg shear walls + viscous damper structure.It is proved that viscous dampers performs better in energy consumption,which makes the structure components maintain the safe state of elastic deformation,makes up shortcomings existing in the short-leg shear wall structure,and secures the building is more economical.Additionally,through simulated destruction test on the vibration table,it is further verified the outstanding shock absorption effect of viscous dampers in short-leg shear wall structures.
Based on the study of seismic design of viscous dampers short-leg shear walls structure,it is summarized and improved the installment location and traditional calculation methods.It is put forward the method of distributing damping coefficient according to the direct ratio of damping force and floor shear,and also adopted the idea of accumulation to realize more accurate calculation of additional damping ratio needed in the structure.Combining real cases,and through comparison of designs,the paper has built finite element models and performed time-history analysis for common shear wall structure,short-leg shear wall structure,short-leg shear walls + viscous damper structure.It is proved that viscous dampers performs better in energy consumption,which makes the structure components maintain the safe state of elastic deformation,makes up shortcomings existing in the short-leg shear wall structure,and secures the building is more economical.Additionally,through simulated destruction test on the vibration table,it is further verified the outstanding shock absorption effect of viscous dampers in short-leg shear wall structures.
2011, 41(8): 55-58,78.
doi: 10.13204/j.gyjz201108015
Abstract:
An electrical resistivity method was introduced into the microstructure study on stabilized expansive soils and evaluated its effectiveness.The expansive soils were stabilized with lime and flyash,the horizontal and vertical electrical resistivity were measured at the same time during curing.The electrical formation parameters,such as the average formation factor,the electrical anisotropy index and the average shape factor were then calculated and studied.The changes in microstructure of lime or flyash stabilized expansive soils during curing were analyzed.The physicochemical process in lime or flyash stabilized expansive soils was discussed.Experimental results show the effectiveness of electrical resistivity method in quantitative study on the microstructure change of the additives stabilized expansive soils during curing.
An electrical resistivity method was introduced into the microstructure study on stabilized expansive soils and evaluated its effectiveness.The expansive soils were stabilized with lime and flyash,the horizontal and vertical electrical resistivity were measured at the same time during curing.The electrical formation parameters,such as the average formation factor,the electrical anisotropy index and the average shape factor were then calculated and studied.The changes in microstructure of lime or flyash stabilized expansive soils during curing were analyzed.The physicochemical process in lime or flyash stabilized expansive soils was discussed.Experimental results show the effectiveness of electrical resistivity method in quantitative study on the microstructure change of the additives stabilized expansive soils during curing.
2011, 41(8): 59-63.
doi: 10.13204/j.gyjz201108016
Abstract:
In order to study the generation mechanism and propagation rule of Rayleigh waves in complex media,and to understand the collected results correctly and improve the inversion precision,it was used the 410 high-order finite difference method with staggered grids to simulate full-wave-fields in elastic media.Synthetic single-shot records and snaps of a homogeneous half-space,a layered media in which shear wave velocity increasing with depth and a layered media with a low velocity interlayer were got by the above simulation.According to the results of model simulation,the past low-order finite difference method is not suitable to study the dispersion characteristics of Rayleigh waves because it may cause serious numerical dispersion.The high-order finite difference method with staggered grids can suppress numerical dispersion effectively,and its modeling results of layered media are consistent with calculation results of dispersion equation.Therefore,this method can be used to study complex non-layered media,and to discuss their dispersion characteristics and instruct practical prospecting works.
In order to study the generation mechanism and propagation rule of Rayleigh waves in complex media,and to understand the collected results correctly and improve the inversion precision,it was used the 410 high-order finite difference method with staggered grids to simulate full-wave-fields in elastic media.Synthetic single-shot records and snaps of a homogeneous half-space,a layered media in which shear wave velocity increasing with depth and a layered media with a low velocity interlayer were got by the above simulation.According to the results of model simulation,the past low-order finite difference method is not suitable to study the dispersion characteristics of Rayleigh waves because it may cause serious numerical dispersion.The high-order finite difference method with staggered grids can suppress numerical dispersion effectively,and its modeling results of layered media are consistent with calculation results of dispersion equation.Therefore,this method can be used to study complex non-layered media,and to discuss their dispersion characteristics and instruct practical prospecting works.
2011, 41(8): 64-68.
doi: 10.13204/j.gyjz201108017
Abstract:
In this paper,high vacuum densification method reinforced saturated dredger fill foundation in coastal land was introduced.Test results show: Firstly,powerful well-point dewatering can quickly decrease the groundwater table and static pore water pressure before ramming,which can effectively limit growth of super static pore water pressure in the process of ramming.Secondly,dynamic stress caused by different ramming point produces overlapping effect along the depth and the most significant soil strength appear about depth of double to treble hammer diameter.The smaller the ramming point spacing is,the better the reinforcement effect will be.While the ramming point spacing takes little impact on effective reinforcement depth.Thirdly,soil strength and foundation bearing capacity increase greatly,effective reinforcement depth is about 8 m;all these are satisfied for design requirements.It is useful and good to improve to saturated dredger fill foundation with high vacuum densification method in the practice.
In this paper,high vacuum densification method reinforced saturated dredger fill foundation in coastal land was introduced.Test results show: Firstly,powerful well-point dewatering can quickly decrease the groundwater table and static pore water pressure before ramming,which can effectively limit growth of super static pore water pressure in the process of ramming.Secondly,dynamic stress caused by different ramming point produces overlapping effect along the depth and the most significant soil strength appear about depth of double to treble hammer diameter.The smaller the ramming point spacing is,the better the reinforcement effect will be.While the ramming point spacing takes little impact on effective reinforcement depth.Thirdly,soil strength and foundation bearing capacity increase greatly,effective reinforcement depth is about 8 m;all these are satisfied for design requirements.It is useful and good to improve to saturated dredger fill foundation with high vacuum densification method in the practice.
2011, 41(8): 69-73.
doi: 10.13204/j.gyjz201108018
Abstract:
This paper presents the experimental research on splitting tensile behavior of adhesion between high performance cement-mortar and concrete to understand the effect type of interface treatment,high performance cement-mortar and grade of concrete strength on the bonding property.The results indicate that the splitting tensile strength increases with the raise of concrete strength and high performance cement-mortar strength,and proper surface roughness of old concrete contributes to the adhesive behavior of high performance cement-mortar and concrete.Prominent property analysis of influential factors of splitting tensile strength shows cement-mortar strength is more prominent than the process of adhesion section and concrete strength is less.The model of the relationship between the splitting tensile strength and cement-mortar strength is set up according to the test results.
This paper presents the experimental research on splitting tensile behavior of adhesion between high performance cement-mortar and concrete to understand the effect type of interface treatment,high performance cement-mortar and grade of concrete strength on the bonding property.The results indicate that the splitting tensile strength increases with the raise of concrete strength and high performance cement-mortar strength,and proper surface roughness of old concrete contributes to the adhesive behavior of high performance cement-mortar and concrete.Prominent property analysis of influential factors of splitting tensile strength shows cement-mortar strength is more prominent than the process of adhesion section and concrete strength is less.The model of the relationship between the splitting tensile strength and cement-mortar strength is set up according to the test results.
2011, 41(8): 74-78.
doi: 10.13204/j.gyjz201108019
Abstract:
Gymnasium of Ningxia University is Unique in its shape construction technology is complex,the steel truss roof is made of stage and audience area system,and its installation has no continuity.Aiming at construction difficult point of truss structure of steel pipe,some key technologies of steel pipe truss are mainly discussed,including the erection of stage area steel truss temporary support and installation of audience area support of transform truss,high-level assembly,and integral lift of radial main truss so on.Using the scheme of erecting steel platform,under transform truss,the construction is speeded up and the economic benefit is also improved.The lifting scheme is far superior to the full scaffolding installing scheme,which may be a reference for the construction of similar projects.
Gymnasium of Ningxia University is Unique in its shape construction technology is complex,the steel truss roof is made of stage and audience area system,and its installation has no continuity.Aiming at construction difficult point of truss structure of steel pipe,some key technologies of steel pipe truss are mainly discussed,including the erection of stage area steel truss temporary support and installation of audience area support of transform truss,high-level assembly,and integral lift of radial main truss so on.Using the scheme of erecting steel platform,under transform truss,the construction is speeded up and the economic benefit is also improved.The lifting scheme is far superior to the full scaffolding installing scheme,which may be a reference for the construction of similar projects.
2011, 41(8): 79-84,125.
doi: 10.13204/j.gyjz201108020
Abstract:
Seven bracing forms in braced frame structures are reviewed and compared,including concentrical brace,eccentric brace,knee brace,buckling restrained brace,extra damper brace,self-centering brace and cable brace.Fundamental principle,state-of-the-art of study and existing problems of each kind of the braces are introduced.Mutual relationship and range of application of the braces are summarized.
Seven bracing forms in braced frame structures are reviewed and compared,including concentrical brace,eccentric brace,knee brace,buckling restrained brace,extra damper brace,self-centering brace and cable brace.Fundamental principle,state-of-the-art of study and existing problems of each kind of the braces are introduced.Mutual relationship and range of application of the braces are summarized.
2011, 41(8): 85-90.
doi: 10.13204/j.gyjz201108021
Abstract:
Four groups(12 in total) of welded hollow spherical joints with ribbed stiffener were tested under uniaxial loads in this paper.With the adoption of elasto-plastic model and consideration of geometric and material nonlinearity,the whole loading process of the specimens was simulated with the help of ABAQUS FEM software.Through combining the test data and computing results,two recommendations used to quantitatively determinate the ultimate bearing capacity of a tested spherical joint were proposed.The relationships between bearing capacity and various influence factors,which include the thickness and diameter of hollow sphere,the diameter of steel tube and the multi-directional axial force,were analyzed and illustrated at the end of this paper.
Four groups(12 in total) of welded hollow spherical joints with ribbed stiffener were tested under uniaxial loads in this paper.With the adoption of elasto-plastic model and consideration of geometric and material nonlinearity,the whole loading process of the specimens was simulated with the help of ABAQUS FEM software.Through combining the test data and computing results,two recommendations used to quantitatively determinate the ultimate bearing capacity of a tested spherical joint were proposed.The relationships between bearing capacity and various influence factors,which include the thickness and diameter of hollow sphere,the diameter of steel tube and the multi-directional axial force,were analyzed and illustrated at the end of this paper.
2011, 41(8): 91-95.
doi: 10.13204/j.gyjz201108022
Abstract:
In order to consider the vibration characteristics of spatial variation of long-span structure seismic response,equation of motion for the multi-point input of long-span structure is studied,seismic response of the long-span structures is analyzed by the principle of pseudo-excitation method.In general software ANSYS,multi-point input is considered as static calculations and harmonious response calculation.As the example analysis,the 80m single-layer reticulated spherical shell structure is analyzed,the vertical seismic response of the long-span spherical shell structure is obtained,statistical analysis of multi-point input and uniform earthquake are compared.Results show that multi-point input considering the travelling wave effect,the node displacement and internal force distribution of long-span spherical shell structure is more complex than unifirm earthquake.So,it is very necessary to fully consider multi-point input motion.
In order to consider the vibration characteristics of spatial variation of long-span structure seismic response,equation of motion for the multi-point input of long-span structure is studied,seismic response of the long-span structures is analyzed by the principle of pseudo-excitation method.In general software ANSYS,multi-point input is considered as static calculations and harmonious response calculation.As the example analysis,the 80m single-layer reticulated spherical shell structure is analyzed,the vertical seismic response of the long-span spherical shell structure is obtained,statistical analysis of multi-point input and uniform earthquake are compared.Results show that multi-point input considering the travelling wave effect,the node displacement and internal force distribution of long-span spherical shell structure is more complex than unifirm earthquake.So,it is very necessary to fully consider multi-point input motion.
2011, 41(8): 96-100.
doi: 10.13204/j.gyjz201108023
Abstract:
Based on the Direct Strength Method(DSM),the applied calculation formulas fitting for the local and distortional bucklings of cold-formed lipped channel columns under axial pressure is carried out.The minima of local,distortional and global bucklings are the buckling carrying capacity calculation results.A comparative study is made between the calculation results and experimental ones.It shows that in applicable scope the results of applied calculation formulas agree well with those of the experiments.The applied calculation formulas are simple,practical and independent of the dedicated computer program.
Based on the Direct Strength Method(DSM),the applied calculation formulas fitting for the local and distortional bucklings of cold-formed lipped channel columns under axial pressure is carried out.The minima of local,distortional and global bucklings are the buckling carrying capacity calculation results.A comparative study is made between the calculation results and experimental ones.It shows that in applicable scope the results of applied calculation formulas agree well with those of the experiments.The applied calculation formulas are simple,practical and independent of the dedicated computer program.
2011, 41(8): 101-104.
doi: 10.13204/j.gyjz201108024
Abstract:
Due to the complexity of large span double-arched roof structure,Chinese load codes are not enough for the design.Other method should be used to ascertain the wind load on the roof structure.The distribution of wind pressure and wind environment on the roofs of large span double-arched structure were computed based on ANSYS-CFX12 software platform with Reynolds stress model(RSM).By the simulation,the unfavorable wind shape coefficient is obtained,which help the designer to enhance the key component for the safety of the serviceability performance when computing the wind load on the surface of a structure.
Due to the complexity of large span double-arched roof structure,Chinese load codes are not enough for the design.Other method should be used to ascertain the wind load on the roof structure.The distribution of wind pressure and wind environment on the roofs of large span double-arched structure were computed based on ANSYS-CFX12 software platform with Reynolds stress model(RSM).By the simulation,the unfavorable wind shape coefficient is obtained,which help the designer to enhance the key component for the safety of the serviceability performance when computing the wind load on the surface of a structure.
2011, 41(8): 105-109.
doi: 10.13204/j.gyjz201108025
Abstract:
The steel plate shear wall is studied with shear load considered only,which isn't accord with the engineering practice.To evaluate the elastic buckling strength of steel plate shear wall bearing shear and vertical load accurately,a finite element analysis is carried out to investigate the elastic buckling of steel plate shear wall with simply surpport on four sides,fix surpport on two vertical sides and simply surport on others and fix support on four sides under shear and pressure.Based on FEA data,the interaction equations of shear combined with vertical compression are revised.Comparisons of the calculation results with those of FEA show that the revised equations have good accuracy and can be applied to design steel plate shear wall.
The steel plate shear wall is studied with shear load considered only,which isn't accord with the engineering practice.To evaluate the elastic buckling strength of steel plate shear wall bearing shear and vertical load accurately,a finite element analysis is carried out to investigate the elastic buckling of steel plate shear wall with simply surpport on four sides,fix surpport on two vertical sides and simply surport on others and fix support on four sides under shear and pressure.Based on FEA data,the interaction equations of shear combined with vertical compression are revised.Comparisons of the calculation results with those of FEA show that the revised equations have good accuracy and can be applied to design steel plate shear wall.
2011, 41(8): 110-114,90.
doi: 10.13204/j.gyjz201108026
Abstract:
Aimed at the inclined concrete-filled steel tubular columns with circle sections in an existing skyscraper,finite element model was set up on the machanical behaviour of this structure.A set of test data was used to verify the finite element model.Generally,good agreement was achieved.Based on the finite element analysis,the interaction between steel tube and concrete,as well as failure mode was primarily analyzed.
Aimed at the inclined concrete-filled steel tubular columns with circle sections in an existing skyscraper,finite element model was set up on the machanical behaviour of this structure.A set of test data was used to verify the finite element model.Generally,good agreement was achieved.Based on the finite element analysis,the interaction between steel tube and concrete,as well as failure mode was primarily analyzed.
2011, 41(8): 115-117,104.
doi: 10.13204/j.gyjz201108027
Abstract:
STRENGTHENING AND RENOVATION IN INNER-FRAME BUILDING OF TEACHING BUILDING FOR A MIDDLE SCHOOL
STRENGTHENING AND RENOVATION IN INNER-FRAME BUILDING OF TEACHING BUILDING FOR A MIDDLE SCHOOL
2011, 41(8): 118-120.
doi: 10.13204/j.gyjz201108028
Abstract:
Stairs as the building of vertical transport and emergency evacuation under the main channel flow of a building are related directly to the normal function of the building use and safety and security of human life,whose important role in the overall structural safety should be concerned.This paper analyzes the reasons of the damages the stairs by seism and compares,on the staircase ladder beam strengthening programs,gives the design scheme of strengthening reinforced concrete ladder beam;which can provide some experience for the designers and constructors,thereby enhancing the structural resistance to natural disasters.
Stairs as the building of vertical transport and emergency evacuation under the main channel flow of a building are related directly to the normal function of the building use and safety and security of human life,whose important role in the overall structural safety should be concerned.This paper analyzes the reasons of the damages the stairs by seism and compares,on the staircase ladder beam strengthening programs,gives the design scheme of strengthening reinforced concrete ladder beam;which can provide some experience for the designers and constructors,thereby enhancing the structural resistance to natural disasters.
2011, 41(8): 121-125.
doi: 10.13204/j.gyjz201108029
Abstract:
Construction of shaft in metro tunnel will inevitably bring ground disturbance and cause settlement of adjacent buildings,then the safety and the normal use of buildings is affected.Based on the practice of a certain metro running tunnel,the deformation character,reason and movement law of the around buildings induced by shaft construction are analyzed in this paper.Thereafter,taking a dormitory building for example,the measures of full-section sealing in tunnel face,such as advanced deep-hole curtain grouting,bench excavation and timely supporting associated with backfill grouting,radius grouting and ground surface grouting,are proposed to reinforce and control the deformation of buildings.
Construction of shaft in metro tunnel will inevitably bring ground disturbance and cause settlement of adjacent buildings,then the safety and the normal use of buildings is affected.Based on the practice of a certain metro running tunnel,the deformation character,reason and movement law of the around buildings induced by shaft construction are analyzed in this paper.Thereafter,taking a dormitory building for example,the measures of full-section sealing in tunnel face,such as advanced deep-hole curtain grouting,bench excavation and timely supporting associated with backfill grouting,radius grouting and ground surface grouting,are proposed to reinforce and control the deformation of buildings.
2011, 41(8): 126-129.
doi: 10.13204/j.gyjz201108030
Abstract:
In order to analyze the collapsing reasons,the design and construction of a rectangular RC contact oxidation tank are discussed.According to on-site detecting and design recheck,the results can be obtained as follows: the construction quality is favorable,which can satisfy the design and acceptance requirements.But there is serious shortage in design aspect.The wall's local negative moment in horizontal direction and the maximum negative moment in bottom side are too large than the calculative resistance.Under the lateral pressure of water,the plastic hinge line will occur in corresponding position of the wall,so that the support condition is changed,which leads to the collapse of the wall.
In order to analyze the collapsing reasons,the design and construction of a rectangular RC contact oxidation tank are discussed.According to on-site detecting and design recheck,the results can be obtained as follows: the construction quality is favorable,which can satisfy the design and acceptance requirements.But there is serious shortage in design aspect.The wall's local negative moment in horizontal direction and the maximum negative moment in bottom side are too large than the calculative resistance.Under the lateral pressure of water,the plastic hinge line will occur in corresponding position of the wall,so that the support condition is changed,which leads to the collapse of the wall.
2011, 41(8): 130-133.
doi: 10.13204/j.gyjz201108031
Abstract:
The overground part of an industrial pond was reinforced concrete structure.During application of the pond,cracks occurred on the concrete wall.It was carried out a detailed analysis of the project incidents,the analysis indicated that the wall cracks were caused by temperature stress.After determining the cause of accident,the original pond was reinforced.The reinforcement scheme of adhibiting carbon fiber and heat insulation of wall were used.It was suggested that heat insulation of wall should be used in the design of the overground pond.
The overground part of an industrial pond was reinforced concrete structure.During application of the pond,cracks occurred on the concrete wall.It was carried out a detailed analysis of the project incidents,the analysis indicated that the wall cracks were caused by temperature stress.After determining the cause of accident,the original pond was reinforced.The reinforcement scheme of adhibiting carbon fiber and heat insulation of wall were used.It was suggested that heat insulation of wall should be used in the design of the overground pond.
2011, 41(8): 134-137,109.
doi: 10.13204/j.gyjz201108032
Abstract:
Combining with the case of reforming Modern Industrial Museum of Hangzhou,it has been expounded the low-carbon comprehensive technical measures for renovation design of the existing buildings from the outdoor environment,energy saving and energy management,water conservation and water use,materials-saving and material resources and indoor environmental control.
Combining with the case of reforming Modern Industrial Museum of Hangzhou,it has been expounded the low-carbon comprehensive technical measures for renovation design of the existing buildings from the outdoor environment,energy saving and energy management,water conservation and water use,materials-saving and material resources and indoor environmental control.
2011, 41(8): 138-141,133.
doi: 10.13204/j.gyjz201108033
Abstract:
The inflexible response to variation of groundwater level and the adverse impact on building or environment are two main defects of the common design methods on anti-floating of structures.The water-discharging pressure relief technology on anti-floating of structures got effective approaches to dealing with them on the basis of common methods.The new technology aimed at keeping a stable groundwater level and minimizing adverse effect on environment around by dynamic control system of the combination of water-discharging pressure relief system and pressure relief security control system.Refer to the successful application of the new system in the project of Universal Studios Singapore,the new system and its design principle was introduced.The practice showed that the system in Universal Studios Singapore well adapted to the variation of groundwater level in different seasons since which was put into service,and ensured safety of the project.
The inflexible response to variation of groundwater level and the adverse impact on building or environment are two main defects of the common design methods on anti-floating of structures.The water-discharging pressure relief technology on anti-floating of structures got effective approaches to dealing with them on the basis of common methods.The new technology aimed at keeping a stable groundwater level and minimizing adverse effect on environment around by dynamic control system of the combination of water-discharging pressure relief system and pressure relief security control system.Refer to the successful application of the new system in the project of Universal Studios Singapore,the new system and its design principle was introduced.The practice showed that the system in Universal Studios Singapore well adapted to the variation of groundwater level in different seasons since which was put into service,and ensured safety of the project.
