Login
Register
E-alert
2009 Vol. 39, No. 10
Display Method:
2009, 39(10): 1-2.
doi: 10.13204/j.gyjz200910001
Abstract:
The development of industrial architecture incorporates the productivity of the society.The appearance and development of the industrial architectures are accompanied with the changes of ages.The article reviewed the development of the industrial architectures and also briefly described the trends of thoughts in industrial architectures in modern times,and then the architects being engaged in the design of industrial architectures are expected to.
The development of industrial architecture incorporates the productivity of the society.The appearance and development of the industrial architectures are accompanied with the changes of ages.The article reviewed the development of the industrial architectures and also briefly described the trends of thoughts in industrial architectures in modern times,and then the architects being engaged in the design of industrial architectures are expected to.
2009, 39(10): 3-4.
doi: 10.13204/j.gyjz200910002
Abstract:
The design of an industrial architectural must follow after the modern architectural design conception,going all out to make a durable and high-quality architecture.The project of Zongshen Motorcycle Engine Plant is designed with a bold innovation,which embodies fully the essence of people-oriented,sustainable development and ecological protection.Based on the idea of ecological design,architectural technology is developed and by means of industrial design,the level of architecture art is improved,to explore the embodying of modern industrial architectures in the 21st century.
The design of an industrial architectural must follow after the modern architectural design conception,going all out to make a durable and high-quality architecture.The project of Zongshen Motorcycle Engine Plant is designed with a bold innovation,which embodies fully the essence of people-oriented,sustainable development and ecological protection.Based on the idea of ecological design,architectural technology is developed and by means of industrial design,the level of architecture art is improved,to explore the embodying of modern industrial architectures in the 21st century.
2009, 39(10): 5-8.
doi: 10.13204/j.gyjz200910003
Abstract:
According to the realities of coexistence of many enterprises in an industrial park,taking a building group as the basic module,and combined with the characteristics of its use and examples of grid-planned structures in the industrial parks,the paper discussed the eco-control measures for the combination of architectural group and ecological elements,and further strengthened the designing concepts based on the control of ecological elements over the structures of industrial parks.
According to the realities of coexistence of many enterprises in an industrial park,taking a building group as the basic module,and combined with the characteristics of its use and examples of grid-planned structures in the industrial parks,the paper discussed the eco-control measures for the combination of architectural group and ecological elements,and further strengthened the designing concepts based on the control of ecological elements over the structures of industrial parks.
2009, 39(10): 9-12.
doi: 10.13204/j.gyjz200910004
Abstract:
This article introduced the definition of an architectural sun-shading system and also put forward the problems and design methods that should be considered in the sun-shading design of industrial buildings,by combining with examples of designing the buildings,sun-shading in some large cigarette factories.
This article introduced the definition of an architectural sun-shading system and also put forward the problems and design methods that should be considered in the sun-shading design of industrial buildings,by combining with examples of designing the buildings,sun-shading in some large cigarette factories.
2009, 39(10): 13-16.
doi: 10.13204/j.gyjz200910005
Abstract:
Great attention must be paid to euterprise culture in an international well-known enterprise.Just as the spirit of a person,the enterprise culture is penetrated into all aspects of an enterprise.How to inject the spirit in the carrier(i.e.the building) of an enterprise should be the target pursued by architects.By means of the design and practice of new factory areas of Beijing ABB High-Pressure Switch Equiprmerct Co.,Ltd,it is expounded how to fuse enterprise culture into the design of buildings.
Great attention must be paid to euterprise culture in an international well-known enterprise.Just as the spirit of a person,the enterprise culture is penetrated into all aspects of an enterprise.How to inject the spirit in the carrier(i.e.the building) of an enterprise should be the target pursued by architects.By means of the design and practice of new factory areas of Beijing ABB High-Pressure Switch Equiprmerct Co.,Ltd,it is expounded how to fuse enterprise culture into the design of buildings.
2009, 39(10): 17-19.
doi: 10.13204/j.gyjz200910006
Abstract:
The continual development of the types of the industrial buildings reveals the amalgamation of the industry and correlative industries obviously,and many industrial gardens integrate the functions of research development,production,marketing,management,living and etc frequently.In this paper,with the illustration of the programming of Donghai Movie and Television Creation Garden of Zhejiang Radio Television Group,it is discussed the realization of the space identifiability,compartmentalization suitability,inner intercommunity,and group stability in the industrial garden in the light of the certain steps of water managing,hill stacking and garden-constructing.
The continual development of the types of the industrial buildings reveals the amalgamation of the industry and correlative industries obviously,and many industrial gardens integrate the functions of research development,production,marketing,management,living and etc frequently.In this paper,with the illustration of the programming of Donghai Movie and Television Creation Garden of Zhejiang Radio Television Group,it is discussed the realization of the space identifiability,compartmentalization suitability,inner intercommunity,and group stability in the industrial garden in the light of the certain steps of water managing,hill stacking and garden-constructing.
2009, 39(10): 20-23.
doi: 10.13204/j.gyjz200910007
Abstract:
The article summarizes the main mode of Qingdao old industrial buildings' reuse through analyzing the examples of Qingdao several successful old industrial buildings that have been updated and used,with a view of getting a wide range of attention and practice for the transformation of old industrial buildings,so the memory of gray space in the city can be retained.
The article summarizes the main mode of Qingdao old industrial buildings' reuse through analyzing the examples of Qingdao several successful old industrial buildings that have been updated and used,with a view of getting a wide range of attention and practice for the transformation of old industrial buildings,so the memory of gray space in the city can be retained.
2009, 39(10): 24-26.
doi: 10.13204/j.gyjz200910008
Abstract:
Based on the theoretical thinking of several cases of building design,the thesis analyzes and summarizes the start point and basic thinking of the creative ideas of images in the design of the industrial buildings.
Based on the theoretical thinking of several cases of building design,the thesis analyzes and summarizes the start point and basic thinking of the creative ideas of images in the design of the industrial buildings.
2009, 39(10): 27-29.
doi: 10.13204/j.gyjz200910009
Abstract:
Reforming and using hte original resources as well as promoting a sustainable development of economy are the new issues that are faced with modern architects.According to the design of reforming the old factory areas of Yizheng Branch of Shanghai Automobile Co.,Ltd,it is summarized that the architectural technology of reforming old factory areas,the design of spatial environment and architectural images,which embodies the important significance of renewing and reforming old buildings.
Reforming and using hte original resources as well as promoting a sustainable development of economy are the new issues that are faced with modern architects.According to the design of reforming the old factory areas of Yizheng Branch of Shanghai Automobile Co.,Ltd,it is summarized that the architectural technology of reforming old factory areas,the design of spatial environment and architectural images,which embodies the important significance of renewing and reforming old buildings.
2009, 39(10): 30-34.
doi: 10.13204/j.gyjz200910010
Abstract:
Six specimens of abnormal interior joints were tested under reversed cyclic loading.Experimental studies were carried out to investigate the effect of joint core dimensions and axial compression ratio on seismic behaviour of abnormal joints.Test results indicated that column section abrupt had little effect on seismic behavior of the specimen.When the reduced height of column section was less than 1/6 column section height,that is h_ch_c/6,the negative effect of that could be neglected.The test results also indicated that beam section abrupt had an obvious effect on seismic behavior of the beam-column subassemblage. When h_b was between h_c/6 and 2h_(bl)/5,the seismic behavior improved gradually with the increase of h_b;When h_b was between 2h_(bl)/5 and h_(bl)/2,the seismic behavior deteriorated with the increase of h_b;When h_b was greater than 1/2 high beam section depth,a exterior joint model would be better for this case analysis.In addition,the axial load level of the column had a negative effect on seismic behavior of abnormal joints after the beam-column subassemblage reached to critical crack stage,it was suggested that the axial compression ratio shoulds be less than 0.3 for the seismic design of this sort of abnormal joint.
Six specimens of abnormal interior joints were tested under reversed cyclic loading.Experimental studies were carried out to investigate the effect of joint core dimensions and axial compression ratio on seismic behaviour of abnormal joints.Test results indicated that column section abrupt had little effect on seismic behavior of the specimen.When the reduced height of column section was less than 1/6 column section height,that is h_ch_c/6,the negative effect of that could be neglected.The test results also indicated that beam section abrupt had an obvious effect on seismic behavior of the beam-column subassemblage. When h_b was between h_c/6 and 2h_(bl)/5,the seismic behavior improved gradually with the increase of h_b;When h_b was between 2h_(bl)/5 and h_(bl)/2,the seismic behavior deteriorated with the increase of h_b;When h_b was greater than 1/2 high beam section depth,a exterior joint model would be better for this case analysis.In addition,the axial load level of the column had a negative effect on seismic behavior of abnormal joints after the beam-column subassemblage reached to critical crack stage,it was suggested that the axial compression ratio shoulds be less than 0.3 for the seismic design of this sort of abnormal joint.
2009, 39(10): 35-39.
doi: 10.13204/j.gyjz200910011
Abstract:
Horizontal Strengthened stories can effectively reduce the lateral displacement of the high-rise tubular structures under lateral load.But the high-rise tubular structures with horizontal strengthened stories displayed the extremely complex response characteristic under the earthquake action.The static elastic-plastic analysis(push-over analysis) of various structures is presented with horizontal strengthened stories,the plastic yield mechanism and ductility performance of these structures under earthquake action have been discussed in this paper.It is pointed out that weak stories will be formed nearby the horizontal strengthened stories.Corresponding design measures to ensure the deformability of the structures under rare earthquake action are put forward.
Horizontal Strengthened stories can effectively reduce the lateral displacement of the high-rise tubular structures under lateral load.But the high-rise tubular structures with horizontal strengthened stories displayed the extremely complex response characteristic under the earthquake action.The static elastic-plastic analysis(push-over analysis) of various structures is presented with horizontal strengthened stories,the plastic yield mechanism and ductility performance of these structures under earthquake action have been discussed in this paper.It is pointed out that weak stories will be formed nearby the horizontal strengthened stories.Corresponding design measures to ensure the deformability of the structures under rare earthquake action are put forward.
2009, 39(10): 40-47.
doi: 10.13204/j.gyjz200910012
Abstract:
Through cyclic loading tests,it is researched the seismic behavior of one simple frame specimen,four brick infilled frame specimens and seven frame specimens infilled with brick walls strengthened with steel-meshed cement mortar or carbon fiber sheet.All of these specimens are one-storey one-span reinforced concrete frames.Failure process,failure modes,load carrying capacity,ultimate deformation,hysteretic curves,skeleton curves,ductility,energy-dissipation capacity and strain of carbon fiber sheet are compared among these specimens.Test results show that shear failure always happens for infilled frames and strengthened infilled frames,and this is very different with flexural failure at column bottoms and beam ends for simple frames;the load carrying capacity of infilled frames is much higher than simple frames,and it can be increased by strengthening the infilled walls with steel-meshed cement mortar or X-shaped carbon fiber sheet,but the strengthening with horizontal carbon fiber sheet has no distinct effect on the load carrying capacity of the infilled frames.The ultimate deformation of infilled frames is much less than simple frames,and the ultimate interstory deformation of infilled frames can reach 1/50,but the ultimate interstory deformation of strengthened infilled frame can only reach 1/80.
Through cyclic loading tests,it is researched the seismic behavior of one simple frame specimen,four brick infilled frame specimens and seven frame specimens infilled with brick walls strengthened with steel-meshed cement mortar or carbon fiber sheet.All of these specimens are one-storey one-span reinforced concrete frames.Failure process,failure modes,load carrying capacity,ultimate deformation,hysteretic curves,skeleton curves,ductility,energy-dissipation capacity and strain of carbon fiber sheet are compared among these specimens.Test results show that shear failure always happens for infilled frames and strengthened infilled frames,and this is very different with flexural failure at column bottoms and beam ends for simple frames;the load carrying capacity of infilled frames is much higher than simple frames,and it can be increased by strengthening the infilled walls with steel-meshed cement mortar or X-shaped carbon fiber sheet,but the strengthening with horizontal carbon fiber sheet has no distinct effect on the load carrying capacity of the infilled frames.The ultimate deformation of infilled frames is much less than simple frames,and the ultimate interstory deformation of infilled frames can reach 1/50,but the ultimate interstory deformation of strengthened infilled frame can only reach 1/80.
2009, 39(10): 48-51.
doi: 10.13204/j.gyjz200910013
Abstract:
Multi-ribbed composite wall is the main load-bearing member in the multi-ribbed slab structure(MRSS).The study on the optimization design method of the wall is an important part of the design theory for the structural system.It is discussed the multi-objective optimization design method of the multiribbed composite wall.The multi-objective optimization design mathematical model which takes both the security(shear resistance of the wall) and economy(cost of the wall) into consideration is established.Then the genetic algorithm(GA) is employed to solve the proposed model.At the same time,a case of optimization design is given.Theoretical analysis and calculated results show that applying the multi-objective optimization design method to the optimization design of the multi-ribbed composite wall can make every objective satisfactory and give consideration to both the security and economy of the wall,and this method was found to be reasonable,practicable and have some meaning to the practical engineering.
Multi-ribbed composite wall is the main load-bearing member in the multi-ribbed slab structure(MRSS).The study on the optimization design method of the wall is an important part of the design theory for the structural system.It is discussed the multi-objective optimization design method of the multiribbed composite wall.The multi-objective optimization design mathematical model which takes both the security(shear resistance of the wall) and economy(cost of the wall) into consideration is established.Then the genetic algorithm(GA) is employed to solve the proposed model.At the same time,a case of optimization design is given.Theoretical analysis and calculated results show that applying the multi-objective optimization design method to the optimization design of the multi-ribbed composite wall can make every objective satisfactory and give consideration to both the security and economy of the wall,and this method was found to be reasonable,practicable and have some meaning to the practical engineering.
2009, 39(10): 52-56.
doi: 10.13204/j.gyjz200910014
Abstract:
It is analyzed the bearing load characteristic of squeezed branch and plate pile group foundation under lateral load by 3D elastic-plasticity finite element model.It is obtained the bending moment of piles,relative displacement between pile and soil,and the change curve of reaction of soil in different position,different load and different depth.The results show that the plate affects the bending moment of pile,which generates saltation in the position of plate,and is reduced greatly under the branch and plate;relative displacement of back pile is bigger than the front pile;pile foundation bears the lateral load by the working of the front soil.The great reaction of soil takes place in the head of the first plate,and which affects the soil under the place by off-loading.
It is analyzed the bearing load characteristic of squeezed branch and plate pile group foundation under lateral load by 3D elastic-plasticity finite element model.It is obtained the bending moment of piles,relative displacement between pile and soil,and the change curve of reaction of soil in different position,different load and different depth.The results show that the plate affects the bending moment of pile,which generates saltation in the position of plate,and is reduced greatly under the branch and plate;relative displacement of back pile is bigger than the front pile;pile foundation bears the lateral load by the working of the front soil.The great reaction of soil takes place in the head of the first plate,and which affects the soil under the place by off-loading.
2009, 39(10): 57-61.
doi: 10.13204/j.gyjz200910015
Abstract:
Based on the viscoelasticity theory,the general partially differential vibration equation is deduced for the viscoelastic beam on the viscoelastic foundation at first.Then,the method to analyze the free vibration of the foundation beam is put forward under circumstances neglected to the viscosity of the beam,but considering the viscosity of the foundation.This method adapts to the general linear foundation which is composed of N-standard linearity by means of series connection or/and parallel connection,and can be used more widely to analyze complicated structures,such as underground railway tunnel,whose compelled vibration induced by moving train.After this,the results are deduced in detail of an elastic beam on a 3-parameter standard linear foundation subjected to arbitrary boundary conditions and to arbitrary initial conditions.In the end,a numerical analyatic example is given to illustrate the validity of this method.The example shows that with the technique which separating one variable into two,the sequence converges so rapidly that,in ordinary cases,only two series should be taken to meet the requirements of a project.
Based on the viscoelasticity theory,the general partially differential vibration equation is deduced for the viscoelastic beam on the viscoelastic foundation at first.Then,the method to analyze the free vibration of the foundation beam is put forward under circumstances neglected to the viscosity of the beam,but considering the viscosity of the foundation.This method adapts to the general linear foundation which is composed of N-standard linearity by means of series connection or/and parallel connection,and can be used more widely to analyze complicated structures,such as underground railway tunnel,whose compelled vibration induced by moving train.After this,the results are deduced in detail of an elastic beam on a 3-parameter standard linear foundation subjected to arbitrary boundary conditions and to arbitrary initial conditions.In the end,a numerical analyatic example is given to illustrate the validity of this method.The example shows that with the technique which separating one variable into two,the sequence converges so rapidly that,in ordinary cases,only two series should be taken to meet the requirements of a project.
2009, 39(10): 62-66.
doi: 10.13204/j.gyjz200910016
Abstract:
In order to determine the capacity of composite foundation,the computational model for composite foundation reinforced by stone columns is founded according to load transfer characteristics and failure pattern.The expression of pile-soil stress ratio considering lateral bulging deformation is obtained according to spatial axisymmetric elastic theory and basic assumptions,which includes deformation compatibility and the equilibrium of radial stress on the interface between stone column and soil.The calculation method of the critical edge load and the critical load of composite foundations reinforced by stone columns is provided by the application of Mohr-Coulomb's failure criterion to soil between stone columns.The critical load is approximate to the results of the classical methods for ultimate capacity of composite foundation.
In order to determine the capacity of composite foundation,the computational model for composite foundation reinforced by stone columns is founded according to load transfer characteristics and failure pattern.The expression of pile-soil stress ratio considering lateral bulging deformation is obtained according to spatial axisymmetric elastic theory and basic assumptions,which includes deformation compatibility and the equilibrium of radial stress on the interface between stone column and soil.The calculation method of the critical edge load and the critical load of composite foundations reinforced by stone columns is provided by the application of Mohr-Coulomb's failure criterion to soil between stone columns.The critical load is approximate to the results of the classical methods for ultimate capacity of composite foundation.
2009, 39(10): 67-71.
doi: 10.13204/j.gyjz200910017
Abstract:
Excavation braced by cantilever double-row piles is simulated by ABAQUS.Duncan-Chang constitutive model is used for the soil and the tangential module is settled to increase with the depth.Horizontal displacement of the pile and the earth pressure are studied.The influences of pile spacing,pile length,beam height,the reinforcement of the passive area and the soils between the piles on the piles behavior are analyzed.The results show that reinforcing the passive area has an obvious effect on decreasing displacement,while the pile length and beam height have little effect.Results are also compared when the piles are simulated by plane strain element and beam element in order to study the effect of the surface contact calculation.
Excavation braced by cantilever double-row piles is simulated by ABAQUS.Duncan-Chang constitutive model is used for the soil and the tangential module is settled to increase with the depth.Horizontal displacement of the pile and the earth pressure are studied.The influences of pile spacing,pile length,beam height,the reinforcement of the passive area and the soils between the piles on the piles behavior are analyzed.The results show that reinforcing the passive area has an obvious effect on decreasing displacement,while the pile length and beam height have little effect.Results are also compared when the piles are simulated by plane strain element and beam element in order to study the effect of the surface contact calculation.
2009, 39(10): 72-75.
doi: 10.13204/j.gyjz200910018
Abstract:
This paper presents the experimental research of 4 GFRP tube composite columns filled with concrete subjected to axial loading to study the mechanical properties of the composite columns.The analysis program is developed,which is used to calculate the section axial stress-strain curves.As compared with experimental data of corresponding documents,the results agree well with each other.The influences of GFRP tube thickness,strength of concrete of axial loading members are analyzed.The results indicate that the bearing capacity of composite columns increased with increasing thickness of GFRP tube,increased with increasing core concrete strength.Finally,through regressive analysis of the results of numerical calculation,a practical formula is created.The calculation results agree well with text results.
This paper presents the experimental research of 4 GFRP tube composite columns filled with concrete subjected to axial loading to study the mechanical properties of the composite columns.The analysis program is developed,which is used to calculate the section axial stress-strain curves.As compared with experimental data of corresponding documents,the results agree well with each other.The influences of GFRP tube thickness,strength of concrete of axial loading members are analyzed.The results indicate that the bearing capacity of composite columns increased with increasing thickness of GFRP tube,increased with increasing core concrete strength.Finally,through regressive analysis of the results of numerical calculation,a practical formula is created.The calculation results agree well with text results.
2009, 39(10): 76-80.
doi: 10.13204/j.gyjz200910019
Abstract:
A total of 10 high-strength concrete columns confined by high-strength stirrups were tested under eccentric loading.The test parameters included the arrangement,spacing of confinement reinforcement and the eccentricities.Test results indicate that,columns confined by stirrups with small spacing and high strength show extremely ductile behavior.Also the experimental column capacities are well above the analytical capacities indicated by the interaction diagrams based on the code.The analytical moment-curvature curves obtained using confined concrete model are in good agreement with the experimental ones.
A total of 10 high-strength concrete columns confined by high-strength stirrups were tested under eccentric loading.The test parameters included the arrangement,spacing of confinement reinforcement and the eccentricities.Test results indicate that,columns confined by stirrups with small spacing and high strength show extremely ductile behavior.Also the experimental column capacities are well above the analytical capacities indicated by the interaction diagrams based on the code.The analytical moment-curvature curves obtained using confined concrete model are in good agreement with the experimental ones.
2009, 39(10): 86-89.
doi: 10.13204/j.gyjz200910021
Abstract:
It is studied that microcosmic pattern and the rules of change in mixtures' immersion,density,mortars' compressive,flexural and bond strengths,via the application of 0.005%-0.8% water-solubility polymer powders(poly6ethylene oxideNP) in the mortar.
It is studied that microcosmic pattern and the rules of change in mixtures' immersion,density,mortars' compressive,flexural and bond strengths,via the application of 0.005%-0.8% water-solubility polymer powders(poly6ethylene oxideNP) in the mortar.
2009, 39(10): 90-95.
doi: 10.13204/j.gyjz200910022
Abstract:
The Heshi Stupa of Famen Temple consists of two towers leaning 36 of verticality in one direction.The two towers have the architectural characteristics of bending shape in space and a Xuyuan Bridge joining two leaning towers at the top.During the construction process of this complex structure different construction procedures will lead to different internal force and deformation distribution.There is a great difference in internal force and deformation distribution between the designed model and the step-by-step construction process,which should be considered in the structural design and construction.It is necessary to analyze the construction procedures in order to make reasonable construction measures and guarantee the safety of structure during the construction and let the internal force and deformation of the completed structure meet the requirements by designers.It is adopted nonlinear finite element method and considered all kinds of factors during the construction to analyze the construction procedures according to the real construction process in order to find the actual internal force and deformation and determine reasonable construction measures.Lots of results have been obtained as guidelines in theory for the design and construction.
The Heshi Stupa of Famen Temple consists of two towers leaning 36 of verticality in one direction.The two towers have the architectural characteristics of bending shape in space and a Xuyuan Bridge joining two leaning towers at the top.During the construction process of this complex structure different construction procedures will lead to different internal force and deformation distribution.There is a great difference in internal force and deformation distribution between the designed model and the step-by-step construction process,which should be considered in the structural design and construction.It is necessary to analyze the construction procedures in order to make reasonable construction measures and guarantee the safety of structure during the construction and let the internal force and deformation of the completed structure meet the requirements by designers.It is adopted nonlinear finite element method and considered all kinds of factors during the construction to analyze the construction procedures according to the real construction process in order to find the actual internal force and deformation and determine reasonable construction measures.Lots of results have been obtained as guidelines in theory for the design and construction.
2009, 39(10): 96-101.
doi: 10.13204/j.gyjz200910023
Abstract:
In the present study,the fire test design of two large full-scale two-way reinforced concrete slabs being fixed at four edges and their installation under extremely narrow space were investigated.Firstly,the choosing of materials,concrete cover thickness,specimen dimensions and the calculating of internal forces and reinforced details at every working conditions were discussed;the internal forces of four-point supported slab with cantilever edges were also analyzed by ANSYS.Secondly,the process of installing the large full-scale specimen under extremely narrow space and insufficient capacity of bridge crane were illustrated in detail.Finally,the methods of simulating the slab supported at four fixed edges were introduced.The results showed that all working conditions should be taken into account while in the specimen design.The analyses by ANSYS indicated that the internal forces of the slab supported at four points were mainly focused on the four points and the lines passed them.The site and the capacity of the hoisting equipments should be considered in the design of large specimens.When there is no sufficient horizontal space in ground,the specimen can be lifted up firstly,so there is sufficient horizontal space on the lifted-up plane for installation.
In the present study,the fire test design of two large full-scale two-way reinforced concrete slabs being fixed at four edges and their installation under extremely narrow space were investigated.Firstly,the choosing of materials,concrete cover thickness,specimen dimensions and the calculating of internal forces and reinforced details at every working conditions were discussed;the internal forces of four-point supported slab with cantilever edges were also analyzed by ANSYS.Secondly,the process of installing the large full-scale specimen under extremely narrow space and insufficient capacity of bridge crane were illustrated in detail.Finally,the methods of simulating the slab supported at four fixed edges were introduced.The results showed that all working conditions should be taken into account while in the specimen design.The analyses by ANSYS indicated that the internal forces of the slab supported at four points were mainly focused on the four points and the lines passed them.The site and the capacity of the hoisting equipments should be considered in the design of large specimens.When there is no sufficient horizontal space in ground,the specimen can be lifted up firstly,so there is sufficient horizontal space on the lifted-up plane for installation.
2009, 39(10): 102-104,147.
doi: 10.13204/j.gyjz200910024
Abstract:
For controlling construction crack,delamination or subregion will be adopted normally for mass concrete construction,with no exclusion of CPR1000 nuclear plant raft,but there are many shortages of it,such as wasting time and money,which may cause more cracks as a result of improper delamination or subregion and maintaining methods.In order to acquire the temperature stress law of different pour thickness,the theoretic analysis of CPR1000 nuclear plant raft with different pour thickness is carried out to verify the feasibility of multilayer cast concrete.All these can provide a theoretic basis and practice reference for similar rafts.
For controlling construction crack,delamination or subregion will be adopted normally for mass concrete construction,with no exclusion of CPR1000 nuclear plant raft,but there are many shortages of it,such as wasting time and money,which may cause more cracks as a result of improper delamination or subregion and maintaining methods.In order to acquire the temperature stress law of different pour thickness,the theoretic analysis of CPR1000 nuclear plant raft with different pour thickness is carried out to verify the feasibility of multilayer cast concrete.All these can provide a theoretic basis and practice reference for similar rafts.
2009, 39(10): 105-113.
doi: 10.13204/j.gyjz200910025
Abstract:
Since the completion of terminal building of Shanghai Pudong International Airport(phase-Ⅰ),where the first cable-supported structure was used,the cablesupported structures(CSS) have been developed rapidly.There are about 300 papers on analyzing,test and application of CSS and about 70 projects from 1998 to 2008.In this paper the concept of CSS,including one-way CSS,two-way CSS,spacial CSS and cable-supported forming structures,was discussed.The development of one-way CSS in the last ten years was introduced.Some problems needing attention were also presented.
Since the completion of terminal building of Shanghai Pudong International Airport(phase-Ⅰ),where the first cable-supported structure was used,the cablesupported structures(CSS) have been developed rapidly.There are about 300 papers on analyzing,test and application of CSS and about 70 projects from 1998 to 2008.In this paper the concept of CSS,including one-way CSS,two-way CSS,spacial CSS and cable-supported forming structures,was discussed.The development of one-way CSS in the last ten years was introduced.Some problems needing attention were also presented.
2009, 39(10): 114-119.
doi: 10.13204/j.gyjz200910026
Abstract:
A seismic response analysis is carried out in order to compare the aseismic performance of three buckling-restrained braced frames(BRBFs).The effects of the two factors,including overstrength of the postyield buckling-restrained brace (BRB) due to the strain-hardening effect and the vertical support for the braced beam by this brace,on the aseismic performance of the beam braced by the chevron unbonded steel plate brace encased in reinforced concrete panel(socalled chevron BRB) are discussed.The analysis reveals that the beams in the three structures remain elasticity under frequent earthquake.The maximum vertical deflection of the beam connected by the chevron braces occurs in the segments of beam between the column and braced points before the brace yielding.Under severe earthquake,the maximum vertical deflection of the braced beams occurs at braced points. The beams designed by taking account of support action of braces but omitting the overstrength of braces develop large plastic deformation,resulting in the slightly larger deflection of the connected beams and the larger vertical gravity forces supported by the chevron BRBs,which make axial plastic deformation of the brace in compression be larger than that of the brace in tension.Whereas,little plastic deformation occurs in the beams designed by taking account of the overstrength but omitting the support action of the braces.
A seismic response analysis is carried out in order to compare the aseismic performance of three buckling-restrained braced frames(BRBFs).The effects of the two factors,including overstrength of the postyield buckling-restrained brace (BRB) due to the strain-hardening effect and the vertical support for the braced beam by this brace,on the aseismic performance of the beam braced by the chevron unbonded steel plate brace encased in reinforced concrete panel(socalled chevron BRB) are discussed.The analysis reveals that the beams in the three structures remain elasticity under frequent earthquake.The maximum vertical deflection of the beam connected by the chevron braces occurs in the segments of beam between the column and braced points before the brace yielding.Under severe earthquake,the maximum vertical deflection of the braced beams occurs at braced points. The beams designed by taking account of support action of braces but omitting the overstrength of braces develop large plastic deformation,resulting in the slightly larger deflection of the connected beams and the larger vertical gravity forces supported by the chevron BRBs,which make axial plastic deformation of the brace in compression be larger than that of the brace in tension.Whereas,little plastic deformation occurs in the beams designed by taking account of the overstrength but omitting the support action of the braces.
2009, 39(10): 120-125.
doi: 10.13204/j.gyjz200910027
Abstract:
The south China suffered a disaster of severe ice and snow in 2008,which caused many steel structures to fail.The large-scale thin-walled steel cylindrical shells widely used in the chemical or electric power engineering as the key facilities in the system are always located some beams internally to support the equipments.Consequently,the shell wall is subjected to local axial compression from the beam and the circumferentially uniformly distributed overall axial compression resulting from the self-weight of the upper part and the roof.The structure has accumulated some stress and deformation under the combined loads. Once it suffers the severe disaster of ice and snow additionally,there will be great load of snow quickly accumulating on the roof with large area and the connecting pipes,which causes the failure.Based on the process of construction and service and in consideration of loading path,the overall uniformly distributed axial compression is firstly applied then the local axial compression,thirdly the uniform axial compression is applied which simulates the great load of ice and snow.The nonlinear stability analyses of 112 cylinders with the initial weld imperfection are conducted.The investigation indicates that the buckling bearing capacity of the cylinder decreases as the initial overall load magnitude increases;the ratio of cylinder buckling bearing capacity under snow against the buckling design bearing capacity under overall uniform compression increases as the amplitude of the imperfection increases,and the post-buckling bearing capacity increases.The bearing capacity against snow increases slightly when the cylindrical shell stores slurry in the lower part.Based on numerous computation results,the design recommendation of the cylindrical shells subjected to the significant load of snow is proposed in consideration of loading history.
The south China suffered a disaster of severe ice and snow in 2008,which caused many steel structures to fail.The large-scale thin-walled steel cylindrical shells widely used in the chemical or electric power engineering as the key facilities in the system are always located some beams internally to support the equipments.Consequently,the shell wall is subjected to local axial compression from the beam and the circumferentially uniformly distributed overall axial compression resulting from the self-weight of the upper part and the roof.The structure has accumulated some stress and deformation under the combined loads. Once it suffers the severe disaster of ice and snow additionally,there will be great load of snow quickly accumulating on the roof with large area and the connecting pipes,which causes the failure.Based on the process of construction and service and in consideration of loading path,the overall uniformly distributed axial compression is firstly applied then the local axial compression,thirdly the uniform axial compression is applied which simulates the great load of ice and snow.The nonlinear stability analyses of 112 cylinders with the initial weld imperfection are conducted.The investigation indicates that the buckling bearing capacity of the cylinder decreases as the initial overall load magnitude increases;the ratio of cylinder buckling bearing capacity under snow against the buckling design bearing capacity under overall uniform compression increases as the amplitude of the imperfection increases,and the post-buckling bearing capacity increases.The bearing capacity against snow increases slightly when the cylindrical shell stores slurry in the lower part.Based on numerous computation results,the design recommendation of the cylindrical shells subjected to the significant load of snow is proposed in consideration of loading history.
2009, 39(10): 126-130,71.
doi: 10.13204/j.gyjz200910028
Abstract:
The experiments of seven rectangular CFT stub columns with binding bars and two without binding bars eccentrically loaded in compression were carried out with the main parameters such as eccentricity ratio and binding bar horizontal spacing.Experimental results indicate that binding bars increase the ductility of rectangular columns under eccentric load and delay the local buckling of steel tubes.The ultimate capacity decreases with load eccentricity ratios increasing.When load eccentricity ratios are the same,the ductility increases with binding bar horizontal spacing decreasing.
The experiments of seven rectangular CFT stub columns with binding bars and two without binding bars eccentrically loaded in compression were carried out with the main parameters such as eccentricity ratio and binding bar horizontal spacing.Experimental results indicate that binding bars increase the ductility of rectangular columns under eccentric load and delay the local buckling of steel tubes.The ultimate capacity decreases with load eccentricity ratios increasing.When load eccentricity ratios are the same,the ductility increases with binding bar horizontal spacing decreasing.
2009, 39(10): 131-135.
doi: 10.13204/j.gyjz200910029
Abstract:
To protect an in service limestone crusher at the quarry side from damage due to impact of the flying rocks,a protecting structure needs to be designed and constructed.Concrete-filled square steel tube columns and steel braces were used as the vertical structure system for the protecting structure.A two-way steel-concrete composite slab-on-girder system was used as the roof structure.After performing comparison analyses,a layer composed of(soil-steel plate-soil) was used to absorb the impact energy of the flying rocks and to act as a buffer layer and a protecting layer on the roof top.Simulation analyses of responses for the roof impacted by the flying rocks were performed using the general software ANSYS/LS-DYNA and the analysis of the whole structure was performed using the software SAP 2000.The results show that the proposed structure achieves the requirement of resisting the impact of the flying rocks with the maximum volume of 1 m~3 and the maximum falling height of 160 m.The proposed protecting structure in this paper can be a reference for common industrial buildings and civil buildings to resist the falling objects from high altitude.
To protect an in service limestone crusher at the quarry side from damage due to impact of the flying rocks,a protecting structure needs to be designed and constructed.Concrete-filled square steel tube columns and steel braces were used as the vertical structure system for the protecting structure.A two-way steel-concrete composite slab-on-girder system was used as the roof structure.After performing comparison analyses,a layer composed of(soil-steel plate-soil) was used to absorb the impact energy of the flying rocks and to act as a buffer layer and a protecting layer on the roof top.Simulation analyses of responses for the roof impacted by the flying rocks were performed using the general software ANSYS/LS-DYNA and the analysis of the whole structure was performed using the software SAP 2000.The results show that the proposed structure achieves the requirement of resisting the impact of the flying rocks with the maximum volume of 1 m~3 and the maximum falling height of 160 m.The proposed protecting structure in this paper can be a reference for common industrial buildings and civil buildings to resist the falling objects from high altitude.
2009, 39(10): 136-140.
doi: 10.13204/j.gyjz200910030
Abstract:
According to the actual seismic damages caused by 2008 Wen Chuan Earthquake,and combined with the regulation of The Code for Aseismic Design of Buildings(2008 edition),it is discussed that the conceptions of aseismic design of buildings,as well as some problems needing attention in the design of building structures,which may be favorable for the aseismic design of buildings in the future.
According to the actual seismic damages caused by 2008 Wen Chuan Earthquake,and combined with the regulation of The Code for Aseismic Design of Buildings(2008 edition),it is discussed that the conceptions of aseismic design of buildings,as well as some problems needing attention in the design of building structures,which may be favorable for the aseismic design of buildings in the future.
2009, 39(10): 141-144.
doi: 10.13204/j.gyjz200910031
Abstract:
The media building of Shandong Broadcast and Television Center is the one with new architectural modelling and complicated spatial structures,which is composed of framed structure,frame-tube structure,prestressed and multiribbed slabs,steel structure etc.The construction of this building is very difficult.The key joints are treated by computer simulation technique.It is presented that the schemes of the constructions as well as the measures for treating the detailed joints.
The media building of Shandong Broadcast and Television Center is the one with new architectural modelling and complicated spatial structures,which is composed of framed structure,frame-tube structure,prestressed and multiribbed slabs,steel structure etc.The construction of this building is very difficult.The key joints are treated by computer simulation technique.It is presented that the schemes of the constructions as well as the measures for treating the detailed joints.
2009, 39(10): 145-147.
doi: 10.13204/j.gyjz200910032
Abstract:
Rem Koolhass is one of the superstar architects in the modern architecture field.His unique architecture theories and avant-garde design concepts are the focuses of architecture field.The industrial rationality of modernism is obviously inherited in his design.However,when studying his masterpieces, it was found that he went beyond the rationality and human concern was reflected in every detail.
Rem Koolhass is one of the superstar architects in the modern architecture field.His unique architecture theories and avant-garde design concepts are the focuses of architecture field.The industrial rationality of modernism is obviously inherited in his design.However,when studying his masterpieces, it was found that he went beyond the rationality and human concern was reflected in every detail.
