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2005 Vol. 35, No. 6
Display Method:
2005, 35(6): 1-5,34.
doi: 10.13204/j.gyjz200506001
Abstract:
The corresponding predictive methods of seismic damages to buildings are summarized systematically byclassifying the existing building structures, in the light of the forced characteristcs and failure mechanism of different types ofstructures subjected to earthquakes, as well as combining with the provisions of the current codes. The research may be auseful reference for aseismic and disaster preventing plans and the prediction of seismic damages.
The corresponding predictive methods of seismic damages to buildings are summarized systematically byclassifying the existing building structures, in the light of the forced characteristcs and failure mechanism of different types ofstructures subjected to earthquakes, as well as combining with the provisions of the current codes. The research may be auseful reference for aseismic and disaster preventing plans and the prediction of seismic damages.
2005, 35(6): 6-10.
doi: 10.13204/j.gyjz200506002
Abstract:
A method of intelligent optimal design based on seismic damage performance and energy analysis is presented onthe base of the performance- based seismic control design based on energy analysis developed in reference [2] and animproved genetic algorithm. The programs of genetic algorithm and the improved genetics algorithm are developed. Thefeasibility and accuration of the method of intelligent optimal design are verified through an example. And the convergence ofthe improved genetic algorithm is better than that of genetic algorithm.
A method of intelligent optimal design based on seismic damage performance and energy analysis is presented onthe base of the performance- based seismic control design based on energy analysis developed in reference [2] and animproved genetic algorithm. The programs of genetic algorithm and the improved genetics algorithm are developed. Thefeasibility and accuration of the method of intelligent optimal design are verified through an example. And the convergence ofthe improved genetic algorithm is better than that of genetic algorithm.
2005, 35(6): 11-13,20.
doi: 10.13204/j.gyjz200506003
Abstract:
It is expounded that the basic theory of pushover and the selection principle of lateral load. Besides it is alsostudied the effect of core region of node on analytic result which gained under different load patterns. Therefore it can offerthe reference for the development of structural software.
It is expounded that the basic theory of pushover and the selection principle of lateral load. Besides it is alsostudied the effect of core region of node on analytic result which gained under different load patterns. Therefore it can offerthe reference for the development of structural software.
2005, 35(6): 14-16.
doi: 10.13204/j.gyjz200506004
Abstract:
Due to the high-strength steel and prestress, the ductility of section of prestressed concrete frame becomes small. The ductility can be improved by adopting partial prestressed concrete section. In order to improve aseismic level of prestressed concrete frame, the prestress degree and reinforcement percentage will be limited. To form a beam hinging collapse mechanism, the limit strength of beam should be controlled. In the light of this thought, the codes of foreign countries have contained the requirement of aseismic design in the end section of frame beam. This requirement is incompatible with the crack resistance requirement, which results in the increase in beam height.This paper puts forward the design thought of a beam hinging collapse mechanism with non- end- section plastic hinges under strong earthquake and the aseismic capability of a prestressed concrete frame by this design thought is also demonstrated by an example.
Due to the high-strength steel and prestress, the ductility of section of prestressed concrete frame becomes small. The ductility can be improved by adopting partial prestressed concrete section. In order to improve aseismic level of prestressed concrete frame, the prestress degree and reinforcement percentage will be limited. To form a beam hinging collapse mechanism, the limit strength of beam should be controlled. In the light of this thought, the codes of foreign countries have contained the requirement of aseismic design in the end section of frame beam. This requirement is incompatible with the crack resistance requirement, which results in the increase in beam height.This paper puts forward the design thought of a beam hinging collapse mechanism with non- end- section plastic hinges under strong earthquake and the aseismic capability of a prestressed concrete frame by this design thought is also demonstrated by an example.
2005, 35(6): 17-20.
doi: 10.13204/j.gyjz200506005
Abstract:
With finite element method, time- history dynamic analysis has been used to study and to demonstrate how much effect the concrete shear wall with friction- damped joints does compared with that without friction- damped joints during seism. It has been improved that when the joints slip, they soften the otherwise rigid wall and educe the seismic response, so it enhances the ductility and the ability of energy dissipation.
With finite element method, time- history dynamic analysis has been used to study and to demonstrate how much effect the concrete shear wall with friction- damped joints does compared with that without friction- damped joints during seism. It has been improved that when the joints slip, they soften the otherwise rigid wall and educe the seismic response, so it enhances the ductility and the ability of energy dissipation.
2005, 35(6): 21-25.
doi: 10.13204/j.gyjz200506006
Abstract:
It is explored that the effect of varying the damping ratio and stiffness of engineering structure on earthquakeaction. The analytic result shows that the increased damping ratio can effectively reduce the structural dynamic response. Theenhanced stiffness can mitigate the structural displacement response. But it can not effectively control the structuralacceleration response. Based on the analysis and conclusion of the recent research results, and then combined with theseismic code, the modified formula for seismic coefficient of engineering structure using the viscoelastic damper is given atlast.
It is explored that the effect of varying the damping ratio and stiffness of engineering structure on earthquakeaction. The analytic result shows that the increased damping ratio can effectively reduce the structural dynamic response. Theenhanced stiffness can mitigate the structural displacement response. But it can not effectively control the structuralacceleration response. Based on the analysis and conclusion of the recent research results, and then combined with theseismic code, the modified formula for seismic coefficient of engineering structure using the viscoelastic damper is given atlast.
2005, 35(6): 26-28.
doi: 10.13204/j.gyjz200506007
Abstract:
Random characteristic of structural damping is discussed. A kinetic differential equation is set up. The effects of damping variability on the seismic response of structural systems are examined with a second- order perturbation method. It is shown that damping uncertainty shouldnct be ignored.
Random characteristic of structural damping is discussed. A kinetic differential equation is set up. The effects of damping variability on the seismic response of structural systems are examined with a second- order perturbation method. It is shown that damping uncertainty shouldnct be ignored.
2005, 35(6): 29-31,63.
doi: 10.13204/j.gyjz200506008
Abstract:
Some shortages in design of staggered masonry dwelling are put forward. The torsional analysis and aseismiccalculation of this dewelling are also introduced. Some suggestions on aseismic measures and structural plan layout are putforward at the end of this paper.
Some shortages in design of staggered masonry dwelling are put forward. The torsional analysis and aseismiccalculation of this dewelling are also introduced. Some suggestions on aseismic measures and structural plan layout are putforward at the end of this paper.
2005, 35(6): 32-34.
doi: 10.13204/j.gyjz200506009
Abstract:
During the adjustment of the city structure, more and more industrial buildings are abandoned.How to adaptively treat and reuse these city heritages is an important problem to all of the cities.The ecological, social and economic values of the renewing and reusing of old industrial buildings are analyzed from the angle of ecology .
During the adjustment of the city structure, more and more industrial buildings are abandoned.How to adaptively treat and reuse these city heritages is an important problem to all of the cities.The ecological, social and economic values of the renewing and reusing of old industrial buildings are analyzed from the angle of ecology .
2005, 35(6): 35-38.
doi: 10.13204/j.gyjz200506010
Abstract:
The types and the characteristics of old industrial buildings are introduced. The superiorities and restrictive factors of the renovation of old industrial buildings are also analyzed. It is pointed out that it cann' t be protected that all aimsof the renovationof old building to be realized, until the scattered tactics of the renovation of old building have been integrated, and the overall and perfect mechanism has been set up.
The types and the characteristics of old industrial buildings are introduced. The superiorities and restrictive factors of the renovation of old industrial buildings are also analyzed. It is pointed out that it cann' t be protected that all aimsof the renovationof old building to be realized, until the scattered tactics of the renovation of old building have been integrated, and the overall and perfect mechanism has been set up.
2005, 35(6): 39-40,44.
doi: 10.13204/j.gyjz200506011
Abstract:
The office building for Yinzhou Bank is the building with one storey below the ground and 22 storeys of concrete frame-shear wall structure above the ground, whose total height is 8515m. It is introduced briefly that the structural lectotype, calculation analysis, foundation design, treatment of model and configuration of this project, which provides a reference for the design of similar structures.
The office building for Yinzhou Bank is the building with one storey below the ground and 22 storeys of concrete frame-shear wall structure above the ground, whose total height is 8515m. It is introduced briefly that the structural lectotype, calculation analysis, foundation design, treatment of model and configuration of this project, which provides a reference for the design of similar structures.
2005, 35(6): 41-44.
doi: 10.13204/j.gyjz200506012
Abstract:
Since reform and open to the outside world in China, with the rapid development of economy, the problem of housing shortage is settled step by step.Then, the housing need of resident develops from the substance to the amenity and the expression. In housing development, people begin to attend the comprehensive quality lifting. Therefore, the designing conceptions of the comprehensive quality lifting of housing are analyzed.
Since reform and open to the outside world in China, with the rapid development of economy, the problem of housing shortage is settled step by step.Then, the housing need of resident develops from the substance to the amenity and the expression. In housing development, people begin to attend the comprehensive quality lifting. Therefore, the designing conceptions of the comprehensive quality lifting of housing are analyzed.
2005, 35(6): 45-48,10.
doi: 10.13204/j.gyjz200506013
Abstract:
Anisotropic elastic- plastic model of layered soil and composite foundation with flexible columns is established tosolve seismic response analysis of composite foundation in layered soil. The doubly asymptotic mult-i directional transmittingboundary for transversely isotropic medium is formed. Based on anisotropic elastic- plastic model of composite foundation andlayered soil, the dynamic FEM program of layered, transversely isotropic medium is developed according to the characteristicof earthquake response analysis for composite foundation. The seismic response analysis of the composite foundation inShanghai is carried out using the developed FEM program. From analysis results, it is shown that the dynamic FEM model oflayered, transversely isotropic composite foundation is feasible and applicable. And the results show that it is necessary totake account of anisotropy of composite foundation in the seismic analysis of composite foundation.
Anisotropic elastic- plastic model of layered soil and composite foundation with flexible columns is established tosolve seismic response analysis of composite foundation in layered soil. The doubly asymptotic mult-i directional transmittingboundary for transversely isotropic medium is formed. Based on anisotropic elastic- plastic model of composite foundation andlayered soil, the dynamic FEM program of layered, transversely isotropic medium is developed according to the characteristicof earthquake response analysis for composite foundation. The seismic response analysis of the composite foundation inShanghai is carried out using the developed FEM program. From analysis results, it is shown that the dynamic FEM model oflayered, transversely isotropic composite foundation is feasible and applicable. And the results show that it is necessary totake account of anisotropy of composite foundation in the seismic analysis of composite foundation.
2005, 35(6): 49-51,25.
doi: 10.13204/j.gyjz200506014
Abstract:
Since piles are set into a composite foundation under an embankment, it can not be directly analyzed in the plane strain way . To analyze the factors influencing its settlement, a representative segment method is developed and 3-D analysis of composite foundation settlement under embankment is done. Compared with the traditional plane strain method that needs to unreasonably suppose the piles as walls, the representative segment method is more reasonable. The changing law of the normalized compressive deformation of stabilized layer and sub- layer of a composite foundation under an embankment is finally analyzed by FEM and ABAQUS program.
Since piles are set into a composite foundation under an embankment, it can not be directly analyzed in the plane strain way . To analyze the factors influencing its settlement, a representative segment method is developed and 3-D analysis of composite foundation settlement under embankment is done. Compared with the traditional plane strain method that needs to unreasonably suppose the piles as walls, the representative segment method is more reasonable. The changing law of the normalized compressive deformation of stabilized layer and sub- layer of a composite foundation under an embankment is finally analyzed by FEM and ABAQUS program.
2005, 35(6): 52-55,60.
doi: 10.13204/j.gyjz200506015
Abstract:
The resistance of tension DX pile consists of the frictional resistance of pile shaft and the resistance of loadcarryingplate. In comparison with the frictional resistance in tension pile, the latter is studied very little both in theory and inexperiment. Several calculation methods of tension resistance of the plate are proposed or identified. The compressive endresistance and tensile resistances of the plate are compared with each other. A few experimental results are analyzed on thebasis of the above calculations. It is found that the failure mode and the resistance of the plate of tension DX pile are relatedwith soil property, the size and depth of the plate. Generally, tensile resistance of the plate is less than compressive oneconsiderably, and the reduction factor is about 0.3~ 0.4.
The resistance of tension DX pile consists of the frictional resistance of pile shaft and the resistance of loadcarryingplate. In comparison with the frictional resistance in tension pile, the latter is studied very little both in theory and inexperiment. Several calculation methods of tension resistance of the plate are proposed or identified. The compressive endresistance and tensile resistances of the plate are compared with each other. A few experimental results are analyzed on thebasis of the above calculations. It is found that the failure mode and the resistance of the plate of tension DX pile are relatedwith soil property, the size and depth of the plate. Generally, tensile resistance of the plate is less than compressive oneconsiderably, and the reduction factor is about 0.3~ 0.4.
2005, 35(6): 56-60.
doi: 10.13204/j.gyjz200506016
Abstract:
The applicability of PTC pile composite foundation is introduced in expressway profundity soft soil groundtreatment. The construction technology of PTC pile is also introduced, the spot monitoring of pore water pressure has beendone in process of the PTC pile construction, the chang ing regularity of pore water pressure has been analysed, and thecompaction effect of the squashing PTC pile has also disscussed, some measures have been put forward in order to eliminatethe effect of pore water pressure.
The applicability of PTC pile composite foundation is introduced in expressway profundity soft soil groundtreatment. The construction technology of PTC pile is also introduced, the spot monitoring of pore water pressure has beendone in process of the PTC pile construction, the chang ing regularity of pore water pressure has been analysed, and thecompaction effect of the squashing PTC pile has also disscussed, some measures have been put forward in order to eliminatethe effect of pore water pressure.
2005, 35(6): 61-63.
doi: 10.13204/j.gyjz200506017
Abstract:
In order to discuss the effect of steel fiber on the mechanical performance of RPC, based on standard curing andhot water curing the effect of proportion of steel fiber on the strength and the impact resistance performance of RPC withdifferent WPB was studied. The results of testing indicated that the strengths and the toughness of RPC with certain steelfiber can be improved greatly, the strengths of RPC were upmost while the WPB was 0118, hot water curing was in favor ofenhancing the compressive strengths of RPC, but it has little effect on the toughness of RPC.
In order to discuss the effect of steel fiber on the mechanical performance of RPC, based on standard curing andhot water curing the effect of proportion of steel fiber on the strength and the impact resistance performance of RPC withdifferent WPB was studied. The results of testing indicated that the strengths and the toughness of RPC with certain steelfiber can be improved greatly, the strengths of RPC were upmost while the WPB was 0118, hot water curing was in favor ofenhancing the compressive strengths of RPC, but it has little effect on the toughness of RPC.
2005, 35(6): 64-65,75.
doi: 10.13204/j.gyjz200506018
Abstract:
Based on the data of pul-l out force and cube strength of commercial concrete specimens, the pul-l out forcecompressive strength curve in Shenzhen was set up. A method was adopted to control the dimension of the center hole simply and effectively and the precision of the curve is consequently ensured. The curve has been applied in many engineering projects to test the strength of commercial concrete in Shenzhen.
Based on the data of pul-l out force and cube strength of commercial concrete specimens, the pul-l out forcecompressive strength curve in Shenzhen was set up. A method was adopted to control the dimension of the center hole simply and effectively and the precision of the curve is consequently ensured. The curve has been applied in many engineering projects to test the strength of commercial concrete in Shenzhen.
2005, 35(6): 66-67,28.
doi: 10.13204/j.gyjz200506019
Abstract:
In this paper, immersion time ( t ) and evaluation parameter ( $GPV ) which are parameters evaluatingpermeability of concrete by dichloromethanewere set up. At the same time, ASTM C1202- 97 was used for the comparison ofrelativity of evaluation parameters. The experimental results show that these two kinds of evaluation parameters meetexponential function.
In this paper, immersion time ( t ) and evaluation parameter ( $GPV ) which are parameters evaluatingpermeability of concrete by dichloromethanewere set up. At the same time, ASTM C1202- 97 was used for the comparison ofrelativity of evaluation parameters. The experimental results show that these two kinds of evaluation parameters meetexponential function.
2005, 35(6): 68-70,79.
doi: 10.13204/j.gyjz200506020
Abstract:
The corrosion of steel bars in concrete has become the major cause that influences the durability of concrete. Aseries of technical measures preventing the corrosion of steel bars have been or are being developed internationally , and thesteel bar inhibitor is one of them. It is summarized that the development of steel bar inhibitor and its continuously expandeduse both at home and abroad.
The corrosion of steel bars in concrete has become the major cause that influences the durability of concrete. Aseries of technical measures preventing the corrosion of steel bars have been or are being developed internationally , and thesteel bar inhibitor is one of them. It is summarized that the development of steel bar inhibitor and its continuously expandeduse both at home and abroad.
2005, 35(6): 71-75.
doi: 10.13204/j.gyjz200506021
Abstract:
The framework membrane structures are widely used nowadays. After form-finding the membrane is overlapped the framework structure to make an integral structure. The nonlinear finite element method is employed to analyze the response of the framework membrane structures subjected to the combination of deadload, pre- force, wind and snow loads; and computation results of integrality model and dividing model have been compared, and some useful conclusions are reached.
The framework membrane structures are widely used nowadays. After form-finding the membrane is overlapped the framework structure to make an integral structure. The nonlinear finite element method is employed to analyze the response of the framework membrane structures subjected to the combination of deadload, pre- force, wind and snow loads; and computation results of integrality model and dividing model have been compared, and some useful conclusions are reached.
2005, 35(6): 76-79.
doi: 10.13204/j.gyjz200506022
Abstract:
In The Code for Design of Steel Structure ( GB 50017- 2003) , there are no specifications about effective lengths of compressive web members for tubular truss with simple joints. This paper used the program of finite element method, analyzed the effective lengths of compressive web members for the tubular truss. The results indicated that the effective lengths of compressive web members mainly depend on the parameters: and , then gave the relative suggested values.
In The Code for Design of Steel Structure ( GB 50017- 2003) , there are no specifications about effective lengths of compressive web members for tubular truss with simple joints. This paper used the program of finite element method, analyzed the effective lengths of compressive web members for the tubular truss. The results indicated that the effective lengths of compressive web members mainly depend on the parameters: and , then gave the relative suggested values.
2005, 35(6): 80-83.
doi: 10.13204/j.gyjz200506023
Abstract:
Concrete- filled steel rectangular tubular( CFSR) structure combines the strong points of both common rectangularsteel tubular structure and concrete- filled circular steel tubular structure, it can be connected easily and safely. Meanwhile,as the steel tube and the filled- in concrete work together, the efficiency of the two materials can be improved and the cost ofthe construction can be reduced. In this paper, the K- joints of CFST truss is analyzed using FEM, the stress distribution ofthe filled- in concrete under normal use is educed. And their failure mode is discussed.
Concrete- filled steel rectangular tubular( CFSR) structure combines the strong points of both common rectangularsteel tubular structure and concrete- filled circular steel tubular structure, it can be connected easily and safely. Meanwhile,as the steel tube and the filled- in concrete work together, the efficiency of the two materials can be improved and the cost ofthe construction can be reduced. In this paper, the K- joints of CFST truss is analyzed using FEM, the stress distribution ofthe filled- in concrete under normal use is educed. And their failure mode is discussed.
2005, 35(6): 84-85,83.
doi: 10.13204/j.gyjz200506024
Abstract:
The stressed skin diaphragm is a structural system that consider profiled sheet of roof and metope working withframework and purline. At present, the profiled sheet is applying widely in construction. If its ability resistance isconsidered enough, it is not only reflect the working of structure but also obtain economic benefit. On the base of studyingthe experiment and checking computation by the Ansys software, static behavior of stressed skin diaphragm connected isanalyzed in this paper.
The stressed skin diaphragm is a structural system that consider profiled sheet of roof and metope working withframework and purline. At present, the profiled sheet is applying widely in construction. If its ability resistance isconsidered enough, it is not only reflect the working of structure but also obtain economic benefit. On the base of studyingthe experiment and checking computation by the Ansys software, static behavior of stressed skin diaphragm connected isanalyzed in this paper.
2005, 35(6): 86-87,97.
doi: 10.13204/j.gyjz200506025
Abstract:
According to the requirements of construction of multi-prestressed steel structures, a kind of sliding elastic baseisolated bearing is invented and the multi-prestressed anchorage which possesses clamping ring with interlaced notches is developed. They can be applied to prestressed latticed shells, cable- trusses, prestressed grid structures, cable- arch etc.
According to the requirements of construction of multi-prestressed steel structures, a kind of sliding elastic baseisolated bearing is invented and the multi-prestressed anchorage which possesses clamping ring with interlaced notches is developed. They can be applied to prestressed latticed shells, cable- trusses, prestressed grid structures, cable- arch etc.
2005, 35(6): 88-91.
doi: 10.13204/j.gyjz200506026
Abstract:
It is easier to control the deflection and crack of the RC beam strengthened with prestress than the one without prestress. In order to study the forced performance of RC beams strengthened with prestressed CFRP, it is analyzed that the effect of different prestress levels on the ultimate bearing capacity of the beam, section moment-curvature and the beam depth of relative compressive zone. And it is also discussed that all the factors influencing the strength, stiffness and failure mode of the RC beams strengthened with CFRP.
It is easier to control the deflection and crack of the RC beam strengthened with prestress than the one without prestress. In order to study the forced performance of RC beams strengthened with prestressed CFRP, it is analyzed that the effect of different prestress levels on the ultimate bearing capacity of the beam, section moment-curvature and the beam depth of relative compressive zone. And it is also discussed that all the factors influencing the strength, stiffness and failure mode of the RC beams strengthened with CFRP.
2005, 35(6): 92-94.
doi: 10.13204/j.gyjz200506027
Abstract:
The methods of detection and restoration of a building with concrete frame after fire are expounded by means ofengineering examples, which provides a reference for treating similar engineering structures after fire.
The methods of detection and restoration of a building with concrete frame after fire are expounded by means ofengineering examples, which provides a reference for treating similar engineering structures after fire.
2005, 35(6): 95-97.
doi: 10.13204/j.gyjz200506028
Abstract:
Based upon the emergence mechanism of structural weak point when high- rise building is spli-t level, the crux ofthe matter is pointed out. A point of view to distinguish architecturally spli-t level building between structurally split-levelbuilding is put forward. The idea to become non- split-level structurally for an architecturally split-level building ispresented. A design method to eliminate weak point by tectonic treatment is put forward.
Based upon the emergence mechanism of structural weak point when high- rise building is spli-t level, the crux ofthe matter is pointed out. A point of view to distinguish architecturally spli-t level building between structurally split-levelbuilding is put forward. The idea to become non- split-level structurally for an architecturally split-level building ispresented. A design method to eliminate weak point by tectonic treatment is put forward.
2005, 35(6): 98-100.
doi: 10.13204/j.gyjz200506029
Abstract:
It has very actual significance to excavate the wealthy humanism connotation in the living space shape oftraditional residence, and to make it accommodate to modern living style and simultaneously keeping local features. Thispaper anatomizes the flexibility of the development of the mode of traditional residence Liang Shuai Xiu courtyardhouse, and expatiates on the value and the approaches of the inheritance and development of the mode of traditionalresidence in contemporary housing in China.
It has very actual significance to excavate the wealthy humanism connotation in the living space shape oftraditional residence, and to make it accommodate to modern living style and simultaneously keeping local features. Thispaper anatomizes the flexibility of the development of the mode of traditional residence Liang Shuai Xiu courtyardhouse, and expatiates on the value and the approaches of the inheritance and development of the mode of traditionalresidence in contemporary housing in China.
