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2006 Vol. 36, No. 11
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2006, 36(11): 1-5,10.
doi: 10.13204/j.gyjz200611001
Abstract:
The technology of recycled concrete restores the original performance of waste concrete by re-processing of the waste concrete and forms new building material through reasonable design of mix proportions,thus reuses the waste resource and solves the problem of environment protection.This technology is one of effective steps to develop green concrete and can achieve sustainable development of building,resource and environment.It is briefly introduced the developments of the recycled concrete and the preliminary achievements of axially loaded stub columns,beams and beam-columns are presented generally.Finally,the need for further research on mechanical behavior and design method of recycled concrete-filled steel tubular members is discussed.
The technology of recycled concrete restores the original performance of waste concrete by re-processing of the waste concrete and forms new building material through reasonable design of mix proportions,thus reuses the waste resource and solves the problem of environment protection.This technology is one of effective steps to develop green concrete and can achieve sustainable development of building,resource and environment.It is briefly introduced the developments of the recycled concrete and the preliminary achievements of axially loaded stub columns,beams and beam-columns are presented generally.Finally,the need for further research on mechanical behavior and design method of recycled concrete-filled steel tubular members is discussed.
2006, 36(11): 6-10.
doi: 10.13204/j.gyjz200611002
Abstract:
Based on theoretical analysis results,the indexes of the axial compression and flexural bearing capacities of concrete filled steel tube after exposure to fire are discussed.The simplified formulae for the calculation of the post-fire axial compression and bending bearing capacities are provided by regression.The simplified results are in good agreement with test results.The post-fire behaviors and charaterestics of the axial and flexural load versus deformation relations were analysed,and the post-fire simplified models of axial load versus deformation and moment versus curvature are presented.Comparisons of calculated results using simplified method show a good agreement with test results.The simplified method can provide a basis for concrete filled steel tubular structural analysis after exposure to fire.
Based on theoretical analysis results,the indexes of the axial compression and flexural bearing capacities of concrete filled steel tube after exposure to fire are discussed.The simplified formulae for the calculation of the post-fire axial compression and bending bearing capacities are provided by regression.The simplified results are in good agreement with test results.The post-fire behaviors and charaterestics of the axial and flexural load versus deformation relations were analysed,and the post-fire simplified models of axial load versus deformation and moment versus curvature are presented.Comparisons of calculated results using simplified method show a good agreement with test results.The simplified method can provide a basis for concrete filled steel tubular structural analysis after exposure to fire.
2006, 36(11): 11-14,36.
doi: 10.13204/j.gyjz200611003
Abstract:
Load-deformation relationship curves of concrete filled double-skin steel tubes(CFDST) subjected to axial compression are analyzed by finite element analysis(using ABAQUS software).The outer steel tubes and the inner steel tubes are circular hollow sections(CHS).The predicted load versus deformation relationship curves are in good agreement with those of tests.Based on the finite element analysis,loads carried by the inner steel tubes,outer steel tubes and concrete respectively during the loading process,as well as interactions between them are analyzed.Finally,influences of hollow section ratio,nominal steel ratio and strength of the materials on the interactions between steel tubes and concrete are investigated.
Load-deformation relationship curves of concrete filled double-skin steel tubes(CFDST) subjected to axial compression are analyzed by finite element analysis(using ABAQUS software).The outer steel tubes and the inner steel tubes are circular hollow sections(CHS).The predicted load versus deformation relationship curves are in good agreement with those of tests.Based on the finite element analysis,loads carried by the inner steel tubes,outer steel tubes and concrete respectively during the loading process,as well as interactions between them are analyzed.Finally,influences of hollow section ratio,nominal steel ratio and strength of the materials on the interactions between steel tubes and concrete are investigated.
2006, 36(11): 15-18,61.
doi: 10.13204/j.gyjz200611004
Abstract:
A total of five specimens were tested under pure bending to investigate the behavior of concrete filled double-skin steel tubular(CFDST) beams.The specimens were fabricated with circular hollow section(CHS) as outer and inner skins.The parameters varied in the tests were hollow section ratio.Utilizing the stress-strain relations of steel and concrete presented in concrete filled circular steel tubes,a numerical method is used for the analysis of load-deformation curves of the double-skin composite members subjected to pure bending.The calculated results agree well with those of tests.A simplified model is also developed for calculating the bearing capacities of the CFDST beams.
A total of five specimens were tested under pure bending to investigate the behavior of concrete filled double-skin steel tubular(CFDST) beams.The specimens were fabricated with circular hollow section(CHS) as outer and inner skins.The parameters varied in the tests were hollow section ratio.Utilizing the stress-strain relations of steel and concrete presented in concrete filled circular steel tubes,a numerical method is used for the analysis of load-deformation curves of the double-skin composite members subjected to pure bending.The calculated results agree well with those of tests.A simplified model is also developed for calculating the bearing capacities of the CFDST beams.
2006, 36(11): 19-22.
doi: 10.13204/j.gyjz200611005
Abstract:
By considering the effect of initial imperfection,ABAQUS software is used to perform nonlinear finite element analysis of behaviour of square concrete-filled thin-walled steel tubes under axial compression.The calculated load-deformation curves are in good agreement with those of tests.The effects of imperfection under different conditions on the behaviour of thin-walled composite columns are analyzed.
By considering the effect of initial imperfection,ABAQUS software is used to perform nonlinear finite element analysis of behaviour of square concrete-filled thin-walled steel tubes under axial compression.The calculated load-deformation curves are in good agreement with those of tests.The effects of imperfection under different conditions on the behaviour of thin-walled composite columns are analyzed.
2006, 36(11): 23-26,41.
doi: 10.13204/j.gyjz200611006
Abstract:
It is attempted to study the compressive behavior of curved concrete-filled circular steel tubular struts.Nonlinear finite element analysis softwareABAQUS is used for the analysis of load versus deformation relations of the strut members.The calculated results show generally good agreement with the test results.The failure mode of curved concrete-filled steel tubular struts is compared with that of empty curved steel tubes.The behavior of the curved composite members are analyzed and discussed.
It is attempted to study the compressive behavior of curved concrete-filled circular steel tubular struts.Nonlinear finite element analysis softwareABAQUS is used for the analysis of load versus deformation relations of the strut members.The calculated results show generally good agreement with the test results.The failure mode of curved concrete-filled steel tubular struts is compared with that of empty curved steel tubes.The behavior of the curved composite members are analyzed and discussed.
2006, 36(11): 27-31,22.
doi: 10.13204/j.gyjz200611007
Abstract:
Tests on eight concrete filled steel tubular(CFST) column-reinforced concrete (RC) beam joints enclosed by rebars under reversed loading were carried out.The failure patterns,hysteretic characteristics,shear transformation,rebar and steel bracket deformations,ductility and energy dissipation under different axial load levels for joints with circular or square columns are discussed in details.The results indicated that all the joints failed in shear failure pattern.Generally,the hysteretic curves for joints with circular columns were plumper than those with square columns,and the seismic performance of all joints can satisfy current Chinese seismic code requirements.
Tests on eight concrete filled steel tubular(CFST) column-reinforced concrete (RC) beam joints enclosed by rebars under reversed loading were carried out.The failure patterns,hysteretic characteristics,shear transformation,rebar and steel bracket deformations,ductility and energy dissipation under different axial load levels for joints with circular or square columns are discussed in details.The results indicated that all the joints failed in shear failure pattern.Generally,the hysteretic curves for joints with circular columns were plumper than those with square columns,and the seismic performance of all joints can satisfy current Chinese seismic code requirements.
2006, 36(11): 32-36.
doi: 10.13204/j.gyjz200611008
Abstract:
The bond behavior between steel tube and core concrete of concrete filled steel tubes under loading is one of the focal points that are concerned by the designers and researchersd.It is an important basis for the design of the connection in concrete filled steel tubular structures to confirm the bond strengths between steel tube and core concrete.Experimental studies on bond behavior of self-compacting concrete filled rectangular steel tubular member are performed,and the differences of bond behavior between normal concrete filled steel tubes and selfcompacting concrete filled steel tube are compared.The results show that the self-concrete can improve the bond strength between the steel tube and core concrete.Finally,the simplified formulas for the bond strength and the simplified model for bond stress versus relative slip relationship are suggested based on the analysis of the test results.
The bond behavior between steel tube and core concrete of concrete filled steel tubes under loading is one of the focal points that are concerned by the designers and researchersd.It is an important basis for the design of the connection in concrete filled steel tubular structures to confirm the bond strengths between steel tube and core concrete.Experimental studies on bond behavior of self-compacting concrete filled rectangular steel tubular member are performed,and the differences of bond behavior between normal concrete filled steel tubes and selfcompacting concrete filled steel tube are compared.The results show that the self-concrete can improve the bond strength between the steel tube and core concrete.Finally,the simplified formulas for the bond strength and the simplified model for bond stress versus relative slip relationship are suggested based on the analysis of the test results.
2006, 36(11): 37-41.
doi: 10.13204/j.gyjz200611009
Abstract:
Used of the theoretical model for the analysis of fire resistance of bar-reinforced concrete filled square steel tubes,factors affecting the fire resistance,such as sectional dimension;slenderness ratio;steel ratio;strength of materials;eccentricity;bar-reinforced ratio and strength of bar-reinforcement,are analyzed.On the basis of that,fire resistance formula is proposed according to ISO-834 and GB 9978-88.
Used of the theoretical model for the analysis of fire resistance of bar-reinforced concrete filled square steel tubes,factors affecting the fire resistance,such as sectional dimension;slenderness ratio;steel ratio;strength of materials;eccentricity;bar-reinforced ratio and strength of bar-reinforcement,are analyzed.On the basis of that,fire resistance formula is proposed according to ISO-834 and GB 9978-88.
2006, 36(11): 42-44.
doi: 10.13204/j.gyjz200611010
Abstract:
Based on the general analysis of high-tech architecture,it is found out that the trend of high-tech design of modern industrial architectures should lay an emphasis on building services as well as space,structure and envelope.It is also pointed out modern industrial architecture design should stress the genuine technical application rather than formal beauty.
Based on the general analysis of high-tech architecture,it is found out that the trend of high-tech design of modern industrial architectures should lay an emphasis on building services as well as space,structure and envelope.It is also pointed out modern industrial architecture design should stress the genuine technical application rather than formal beauty.
2006, 36(11): 45-47,55.
doi: 10.13204/j.gyjz200611011
Abstract:
Confronting the weakening and disappearance of leading consciousness of industry architectural design in the domain of bringing forth new ideas of architectural design,it is analysed the puzzled problems in architectural design creation and traced back the historical contribution of the industry architectural creation to the development of the architectural design creation;it is pointed out that industrial architecture is the assigned topic of original exploration of solving basic problems of architecture and explained the meaning of reality and future in the return of the industry architectural creation for original ecology,original power of technology of designing creative environment.
Confronting the weakening and disappearance of leading consciousness of industry architectural design in the domain of bringing forth new ideas of architectural design,it is analysed the puzzled problems in architectural design creation and traced back the historical contribution of the industry architectural creation to the development of the architectural design creation;it is pointed out that industrial architecture is the assigned topic of original exploration of solving basic problems of architecture and explained the meaning of reality and future in the return of the industry architectural creation for original ecology,original power of technology of designing creative environment.
2006, 36(11): 48-51,66.
doi: 10.13204/j.gyjz200611012
Abstract:
Based on analyzing the situation of the culture of traditional vernacular dwellings,it is put forward the concept of `ecological culture of the rural settlements',and relevant theories such as ecology,landscape,and building physics are applied to a further study on their basic characteristics,forming mechanism,landscape values,spatial features,as well as social and economic benefits.Further more,it is pointed out that the importance of integrating the development of the culture of rural settlements with technique,it is also commented on the design principles and relevant policies with the planning,exploiting,utilizing and protecting the settlement environment,such views of analyzing could have an aggressive insfruction function to the current development of touring with ecological culture of rural settlements and the sustainable development.
Based on analyzing the situation of the culture of traditional vernacular dwellings,it is put forward the concept of `ecological culture of the rural settlements',and relevant theories such as ecology,landscape,and building physics are applied to a further study on their basic characteristics,forming mechanism,landscape values,spatial features,as well as social and economic benefits.Further more,it is pointed out that the importance of integrating the development of the culture of rural settlements with technique,it is also commented on the design principles and relevant policies with the planning,exploiting,utilizing and protecting the settlement environment,such views of analyzing could have an aggressive insfruction function to the current development of touring with ecological culture of rural settlements and the sustainable development.
2006, 36(11): 52-55.
doi: 10.13204/j.gyjz200611013
Abstract:
In view of the outstanding problem that the stiffness formula of the flexural member in the currentCode for Design of Concrete Structures(GB 50010-2002) can only be used for one-way flexural member,the two-way slab strip superposition method for calculating deflection in the panel center of flat plate supported by column(FPSC) is presented.The calculation formulas of ratio M-(max)/ of the maximum moment(M-(max)) to the average moment() at the critical section of support of FPSC is given by finite element analysis and curvefitting.Based on the method and formula,recommendatory method on crack check for FPSC is presented.
In view of the outstanding problem that the stiffness formula of the flexural member in the currentCode for Design of Concrete Structures(GB 50010-2002) can only be used for one-way flexural member,the two-way slab strip superposition method for calculating deflection in the panel center of flat plate supported by column(FPSC) is presented.The calculation formulas of ratio M-(max)/ of the maximum moment(M-(max)) to the average moment() at the critical section of support of FPSC is given by finite element analysis and curvefitting.Based on the method and formula,recommendatory method on crack check for FPSC is presented.
2006, 36(11): 56-58.
doi: 10.13204/j.gyjz200611014
Abstract:
Full-size specimens of the double-ball anchorage system used in prestressed concrete structures were tested to investigate its behavior under sustained loads,its maximum load-carrying capacity and the influence of stress levels of sustained loads on its performance.The formula for estimating its deformation related to sustained loads is proposed.
Full-size specimens of the double-ball anchorage system used in prestressed concrete structures were tested to investigate its behavior under sustained loads,its maximum load-carrying capacity and the influence of stress levels of sustained loads on its performance.The formula for estimating its deformation related to sustained loads is proposed.
2006, 36(11): 59-61.
doi: 10.13204/j.gyjz200611015
Abstract:
The stress distribution and variation regularity of continuous wall beam with portal are analyzed by finite element method and figures,as well as tables,then interaction between continuous wall beam and trimmer beam,and stress distribution can be calculated.The stress variation regularity can be verified,the regularities that can not be found by tests can also be obtained.The computation will provide a precise theoretical basis for the design of a wall beam.
The stress distribution and variation regularity of continuous wall beam with portal are analyzed by finite element method and figures,as well as tables,then interaction between continuous wall beam and trimmer beam,and stress distribution can be calculated.The stress variation regularity can be verified,the regularities that can not be found by tests can also be obtained.The computation will provide a precise theoretical basis for the design of a wall beam.
2006, 36(11): 62-66.
doi: 10.13204/j.gyjz200611016
Abstract:
Utilizing finite element method,it is made the performance analysis of contribution of in-filled block in composite wall to anti-compression,distribution feature and law of axial force under vertical load.Using cross-section shape and size of frame column and ribbed-column,arrangement of ribbed-column and height of blind beam as parameters,the influencing factors of distribution coefficient of axial force are discussed and its calculation value is given,it provides a basis for calculating axial force of frame column and ribbed-column.
Utilizing finite element method,it is made the performance analysis of contribution of in-filled block in composite wall to anti-compression,distribution feature and law of axial force under vertical load.Using cross-section shape and size of frame column and ribbed-column,arrangement of ribbed-column and height of blind beam as parameters,the influencing factors of distribution coefficient of axial force are discussed and its calculation value is given,it provides a basis for calculating axial force of frame column and ribbed-column.
2006, 36(11): 67-71,108.
doi: 10.13204/j.gyjz200611017
Abstract:
It is Simulated the elastoplastic response of the reinforced concrete single-storey industrial mill buildings subjected to the artificial earthquake wave by simulating the time and the intensity of an earthquake.Combining with structural safety,durability and economical result,then the age distribution of the structures in service can be simulated when the accumulated damage,the natural deterioration of the structure,durable,erosive damage and repair decision are considered.
It is Simulated the elastoplastic response of the reinforced concrete single-storey industrial mill buildings subjected to the artificial earthquake wave by simulating the time and the intensity of an earthquake.Combining with structural safety,durability and economical result,then the age distribution of the structures in service can be simulated when the accumulated damage,the natural deterioration of the structure,durable,erosive damage and repair decision are considered.
2006, 36(11): 72-75,86.
doi: 10.13204/j.gyjz200611018
Abstract:
The dynamic response of a saturated foundation,due to an axisymmetric load,is investigated theoretically by developing the coupling thermo-hydro-mechanical governing equations.The material of foundation,obeying Biot's dynamic poroelastic theory,is idealized as a uniform,fully saturated poroelastic half-space stratum.The analytical solutions of stress,displacement and pore pressure are derived using the Hankel transform and the inverse Hankel transform.Numerical results are obtained and used to analyze the distribution of temperature increment,stress,displacement and pore pressure on the condition of thermo-hydro-mechanical coupling.Further more,the results of hydro-mechanical coupling are compared with those of this paper.
The dynamic response of a saturated foundation,due to an axisymmetric load,is investigated theoretically by developing the coupling thermo-hydro-mechanical governing equations.The material of foundation,obeying Biot's dynamic poroelastic theory,is idealized as a uniform,fully saturated poroelastic half-space stratum.The analytical solutions of stress,displacement and pore pressure are derived using the Hankel transform and the inverse Hankel transform.Numerical results are obtained and used to analyze the distribution of temperature increment,stress,displacement and pore pressure on the condition of thermo-hydro-mechanical coupling.Further more,the results of hydro-mechanical coupling are compared with those of this paper.
2006, 36(11): 76-82,97.
doi: 10.13204/j.gyjz200611019
Abstract:
By considering consolidation and rheological characteristics of Shanghai saturated soils and three soil layers calculated model in which the compressible strata of pile toe is sand,the numerical simulation of settlement characteristics of bored pile and driven pile foundation is carried out by FEM software package(ABAQUS) and the effects of sand layer surrounding the pile in shallow depth on both kinds of pile foundations are analyzed.The effects of piling effect on pile foundation settlement are effectively verified in accordance with the usage of cylinder expansion theory to simulate the excess pore water pressure induced by pile driving.Finally,based on the displaced soil effect in shallow sand layer surrounding the pile induced by pile driving,numerical simulation of positive action of shallow sand strata surrounding the pile to reduce the driven pile foundation settlement is also presented.
By considering consolidation and rheological characteristics of Shanghai saturated soils and three soil layers calculated model in which the compressible strata of pile toe is sand,the numerical simulation of settlement characteristics of bored pile and driven pile foundation is carried out by FEM software package(ABAQUS) and the effects of sand layer surrounding the pile in shallow depth on both kinds of pile foundations are analyzed.The effects of piling effect on pile foundation settlement are effectively verified in accordance with the usage of cylinder expansion theory to simulate the excess pore water pressure induced by pile driving.Finally,based on the displaced soil effect in shallow sand layer surrounding the pile induced by pile driving,numerical simulation of positive action of shallow sand strata surrounding the pile to reduce the driven pile foundation settlement is also presented.
2006, 36(11): 83-86.
doi: 10.13204/j.gyjz200611020
Abstract:
Deformation monitoring plays important role in excavation-engineering work.As to different monitoring spots,some relevant monitoring targets are selected.MGM(1,n) model,used to proceed a synthesizing prediction,embodies the inner relationship of the deformation data,so it must be much more veracious and credible.It is combined the settlement of nearby-buildings and the displacement of adjacent inclined holes.And the result of prediction is good.
Deformation monitoring plays important role in excavation-engineering work.As to different monitoring spots,some relevant monitoring targets are selected.MGM(1,n) model,used to proceed a synthesizing prediction,embodies the inner relationship of the deformation data,so it must be much more veracious and credible.It is combined the settlement of nearby-buildings and the displacement of adjacent inclined holes.And the result of prediction is good.
2006, 36(11): 87-89.
doi: 10.13204/j.gyjz200611021
Abstract:
Bonding behaviour is one of the important performances of waterpoofing material,which plays an important role in layer stability for concrete bridge decks.The bonding performance is studied by the pull-out testing.The testing results show that there are different bonding strengths for different materials,and the weakness surface lies between waterproofing layer and bridge concrete.At the same time,with the temperature rising,the bonding strength decreases significantly with the exponential function.In addition,the bonding strength changes with the surface condition of concrete and the function is multinomial.Finally the heal-up ability after being destroyed is only half strength for prepared waterproofing sheet,and almost zero for broken paint films.
Bonding behaviour is one of the important performances of waterpoofing material,which plays an important role in layer stability for concrete bridge decks.The bonding performance is studied by the pull-out testing.The testing results show that there are different bonding strengths for different materials,and the weakness surface lies between waterproofing layer and bridge concrete.At the same time,with the temperature rising,the bonding strength decreases significantly with the exponential function.In addition,the bonding strength changes with the surface condition of concrete and the function is multinomial.Finally the heal-up ability after being destroyed is only half strength for prepared waterproofing sheet,and almost zero for broken paint films.
2006, 36(11): 90-93.
doi: 10.13204/j.gyjz200611022
Abstract:
The high performance concrete's impermeability to chloride ions is studied using the method in ASTM C1202.The result shows that the decrease of W/C ratio can reduce the penetration of chloride ions into the concrete,but the impermeability of the concrete can not be improved effectively by decreasing W/C ratio.When fly ash and silica fume are added into the concrete,penetration of chloride ions is on the decline.The resistance to penetration of chloride ions into the concrete can be further improved by combining silica fume with fly ash added into the concrete,and concrete combining silica fume with fly ash is one of the effective methods to get HPC with high impermeability to chloride ions.
The high performance concrete's impermeability to chloride ions is studied using the method in ASTM C1202.The result shows that the decrease of W/C ratio can reduce the penetration of chloride ions into the concrete,but the impermeability of the concrete can not be improved effectively by decreasing W/C ratio.When fly ash and silica fume are added into the concrete,penetration of chloride ions is on the decline.The resistance to penetration of chloride ions into the concrete can be further improved by combining silica fume with fly ash added into the concrete,and concrete combining silica fume with fly ash is one of the effective methods to get HPC with high impermeability to chloride ions.
2006, 36(11): 94-97.
doi: 10.13204/j.gyjz200611023
Abstract:
The compressive and flexural strengths of three types of synthetic structural fiber reinforced concretes are researched and the load-deformation curves are recorded.By JSCE the beding toughness and bending toughness coefficient are calculated.By pull-out experiments the interfacial bond behaviour between fiber and concrete matrix are researched and the pull-out load-displacement curves are recorded.The mechanisms of fiber reinforced concretes are analyzed.Results show that the interfacial bond behavior is excellent and concretes are reinforced and toughened with these fibers.
The compressive and flexural strengths of three types of synthetic structural fiber reinforced concretes are researched and the load-deformation curves are recorded.By JSCE the beding toughness and bending toughness coefficient are calculated.By pull-out experiments the interfacial bond behaviour between fiber and concrete matrix are researched and the pull-out load-displacement curves are recorded.The mechanisms of fiber reinforced concretes are analyzed.Results show that the interfacial bond behavior is excellent and concretes are reinforced and toughened with these fibers.
2006, 36(11): 98-101,105.
doi: 10.13204/j.gyjz200611024
Abstract:
If a tower crane is located at the top of a frame structure,the steel beams will be installed under the crane to undertake its weight.The body of the crane shall be connected with the original beams and slabs of the roof.The overturning moment of the crane will be counteracted.The internal force of the steel beams will be analyzed by exact mechanical method.By the results the correct type of steel beams will be chosen.At the same time the correct connection between the framework columns and the steel becuns will be ensured.Furthermore,the influence of this crane on the original building is also considered and calculated.
If a tower crane is located at the top of a frame structure,the steel beams will be installed under the crane to undertake its weight.The body of the crane shall be connected with the original beams and slabs of the roof.The overturning moment of the crane will be counteracted.The internal force of the steel beams will be analyzed by exact mechanical method.By the results the correct type of steel beams will be chosen.At the same time the correct connection between the framework columns and the steel becuns will be ensured.Furthermore,the influence of this crane on the original building is also considered and calculated.
2006, 36(11): 102-105.
doi: 10.13204/j.gyjz200611025
Abstract:
The requirements for allowable stress design of masonry were retained and strength design provisions were first included in the American Building Code Requirements for Masonry Structures(ACI 530-02/ASCE 5-02/TMS 402-02) in the 2002 edition.Allowable stress and strength design method for bending member are briefly compared and introduced.The purpose is knowing more about building code for masonry structures in the United States.This will be helpful to compile new design code for masonry and enhance development of building code of masonry structures in China.
The requirements for allowable stress design of masonry were retained and strength design provisions were first included in the American Building Code Requirements for Masonry Structures(ACI 530-02/ASCE 5-02/TMS 402-02) in the 2002 edition.Allowable stress and strength design method for bending member are briefly compared and introduced.The purpose is knowing more about building code for masonry structures in the United States.This will be helpful to compile new design code for masonry and enhance development of building code of masonry structures in China.
2006, 36(11): 106-108.
doi: 10.13204/j.gyjz200611026
Abstract:
Based on the analysis of the relation of moment and curvature of prestressed concrete hollow slabs strengthened with CFRP plate,the moment and curvature of a specified section are given,namely,the curve of M-.The computed result is compared with that of the test,which verifis the reliability of the method and the program.
Based on the analysis of the relation of moment and curvature of prestressed concrete hollow slabs strengthened with CFRP plate,the moment and curvature of a specified section are given,namely,the curve of M-.The computed result is compared with that of the test,which verifis the reliability of the method and the program.
2006, 36(11): 109-110,114.
doi: 10.13204/j.gyjz200611027
Abstract:
It is introduced that the storey-adding design and construction of an office building;it is also solved the technical problems and reduced the amount of the strengthening project using an outer frame structural system,unbonded prestressed underpinned beams and end-bearing pile foundation.
It is introduced that the storey-adding design and construction of an office building;it is also solved the technical problems and reduced the amount of the strengthening project using an outer frame structural system,unbonded prestressed underpinned beams and end-bearing pile foundation.
2006, 36(11): 111-114.
doi: 10.13204/j.gyjz200611028
Abstract:
Early transformer substation outdoor trusses are all structured in reinforced concrete.Du to the structure feature of the concrete,technical limit and construction quality in the old days,with years' operation,corrosion of craze and peeling wildly appears on the surface concrete of these trusses which seriously affects transformer substation's operation and safety.A research on this corrosion is done and pointed out that the machanism of the corrosion is the overall effect of concrete's carbonization,alkaline aggregate reaction,corrosive media corrosion,and reinforcing steel bar corrosion.It also gives the method about how to clean and patch those corrosive positions and shows us wrapped anticorrosive treatment.Specific engineering practice has proved the correctness of the research on the corrosive mechanism as well as the feasibility and validity of the anticorrosive treatment.
Early transformer substation outdoor trusses are all structured in reinforced concrete.Du to the structure feature of the concrete,technical limit and construction quality in the old days,with years' operation,corrosion of craze and peeling wildly appears on the surface concrete of these trusses which seriously affects transformer substation's operation and safety.A research on this corrosion is done and pointed out that the machanism of the corrosion is the overall effect of concrete's carbonization,alkaline aggregate reaction,corrosive media corrosion,and reinforcing steel bar corrosion.It also gives the method about how to clean and patch those corrosive positions and shows us wrapped anticorrosive treatment.Specific engineering practice has proved the correctness of the research on the corrosive mechanism as well as the feasibility and validity of the anticorrosive treatment.
2006, 36(11): 115-118.
doi: 10.13204/j.gyjz200611029
Abstract:
Based on the analysis of functional structure and landsacpe elements,and combining with project practice of Yonger West Production Base,it is proposed the aims of landscape design of factories,and discussed design points of landscape boundaries,landscape areas and landscape joints,and design methods to construct a unified factory environment.
Based on the analysis of functional structure and landsacpe elements,and combining with project practice of Yonger West Production Base,it is proposed the aims of landscape design of factories,and discussed design points of landscape boundaries,landscape areas and landscape joints,and design methods to construct a unified factory environment.
2006, 36(11): 119-122.
doi: 10.13204/j.gyjz200611030
Abstract:
Based on the presentation Structural Design of the Burj Dubai Tower by William F.Baker on the International Seminar of Design and Construction Technologies of Super High-Rise Buildings,which has been held in Shanghai on May 15～16,2006,a brief introduction to the skyscraper is given from several aspects:structural design,wind engineering and foundation.By comparing with other super high-rise buildings,some conclusions and suggestions are offered.
Based on the presentation Structural Design of the Burj Dubai Tower by William F.Baker on the International Seminar of Design and Construction Technologies of Super High-Rise Buildings,which has been held in Shanghai on May 15～16,2006,a brief introduction to the skyscraper is given from several aspects:structural design,wind engineering and foundation.By comparing with other super high-rise buildings,some conclusions and suggestions are offered.
