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2006 Vol. 36, No. 4
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2006, 36(4): 1-4.
doi: 10.13204/j.gyjz200604001
Abstract:
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique with a bright future.In this technique,the stress distribution on releasing CFRP sheet is very complicated.It is presented the concept of prestressed CFRP sheets' transferable area according to prestressed concrete theory.A total of 7 specimens were tested to investigate in detail CFRP sheet's strain distribution,prestressed CFRP sheets' transferable area,and concrete's strain distribution.Formula of calculating prestressed CFRP sheets' transferable area were given.All the work gives some supports to found the system of design theory of this technique.
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique with a bright future.In this technique,the stress distribution on releasing CFRP sheet is very complicated.It is presented the concept of prestressed CFRP sheets' transferable area according to prestressed concrete theory.A total of 7 specimens were tested to investigate in detail CFRP sheet's strain distribution,prestressed CFRP sheets' transferable area,and concrete's strain distribution.Formula of calculating prestressed CFRP sheets' transferable area were given.All the work gives some supports to found the system of design theory of this technique.
2006, 36(4): 5-8,18.
doi: 10.13204/j.gyjz200604002
Abstract:
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique with a bright future.Prestress loss is an important problem in this technique.It is analyzed the production mechanism of long loss because of deformation of drawing machine,pasting CFRP sheet,releasing CFRP sheet,and the material's property.In the experiment the prestress loss of releasing CFRP sheet is discussed in detail,relevant factors including prestressed degree,anchorage treatments,and layers of CFRP sheets are analyzed.Finally it is also given the equation of calculating effective prestress and some advice of decreasing the prestress loss.
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique with a bright future.Prestress loss is an important problem in this technique.It is analyzed the production mechanism of long loss because of deformation of drawing machine,pasting CFRP sheet,releasing CFRP sheet,and the material's property.In the experiment the prestress loss of releasing CFRP sheet is discussed in detail,relevant factors including prestressed degree,anchorage treatments,and layers of CFRP sheets are analyzed.Finally it is also given the equation of calculating effective prestress and some advice of decreasing the prestress loss.
2006, 36(4): 9-11,39.
doi: 10.13204/j.gyjz200604003
Abstract:
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique anchorage method is an important problem in this technique.The anchorage effect of different layout of U-shaped CFRP sheets is given by load-testing 7 concrete beams.The principles of placing U-shaped CFRP sheets are proposed,which may benefit the design and construction of this technique.
The technique of concrete structure strengthened with prestressed CFRP sheet is an effective technique anchorage method is an important problem in this technique.The anchorage effect of different layout of U-shaped CFRP sheets is given by load-testing 7 concrete beams.The principles of placing U-shaped CFRP sheets are proposed,which may benefit the design and construction of this technique.
2006, 36(4): 12-14.
doi: 10.13204/j.gyjz200604004
Abstract:
The new method using CFRP laminates to strengthen concrete beams has several disadvantages: the strength of CFRP laminates could not be thoroughly utilized and the serviceability of strengthened concrete beams could not be significantly improved.The applied prestressing in CFRP laminates could not only make full use of the strength of the CFRP laminates but also effectively enhance the forced properties of the strengthened beams,thus preventing development of the deformations and cracks.Present investigations on prestressed CFRP laminates mainly focus on anchorage system,experimental and theoretical studies as well as nonlinear element analysis of strengthened concrete beams.This paper summarizes the upto-date achievements of concrete beams strengthened with prestressed CFRP laminates.Furthermore,the future of CFRP laminates is prospected.
The new method using CFRP laminates to strengthen concrete beams has several disadvantages: the strength of CFRP laminates could not be thoroughly utilized and the serviceability of strengthened concrete beams could not be significantly improved.The applied prestressing in CFRP laminates could not only make full use of the strength of the CFRP laminates but also effectively enhance the forced properties of the strengthened beams,thus preventing development of the deformations and cracks.Present investigations on prestressed CFRP laminates mainly focus on anchorage system,experimental and theoretical studies as well as nonlinear element analysis of strengthened concrete beams.This paper summarizes the upto-date achievements of concrete beams strengthened with prestressed CFRP laminates.Furthermore,the future of CFRP laminates is prospected.
2006, 36(4): 15-18.
doi: 10.13204/j.gyjz200604005
Abstract:
It is presented a primary study of strengthening reinforced concrete beam using prestressing CFRP sheets and its processing technology of strengthening in laboratory.It was studied that the cohering properties of CFRP sheets and concrete,the measured effective prestress which could be applied to the reinforced concrete beam.By studying and adopting a new anchoring measure,prestress can be effectively transferred to the reinforced concrete beam,and the effective prestress applied to the reinforced concrete beam is 70%～80%of the total prestress.The experimental results are valuable for applying in engineerings.
It is presented a primary study of strengthening reinforced concrete beam using prestressing CFRP sheets and its processing technology of strengthening in laboratory.It was studied that the cohering properties of CFRP sheets and concrete,the measured effective prestress which could be applied to the reinforced concrete beam.By studying and adopting a new anchoring measure,prestress can be effectively transferred to the reinforced concrete beam,and the effective prestress applied to the reinforced concrete beam is 70%～80%of the total prestress.The experimental results are valuable for applying in engineerings.
2006, 36(4): 19-22.
doi: 10.13204/j.gyjz200604006
Abstract:
Based upon the experimental study on shear bearing capacity of seven strengthening RC beams using aramid fiber reinforced plastic(AFRP) sheets,the effects of different prestress levels and different shear strengthening measures on shear bearing capacity of RC strengthening beams were researched.The experimental results show that as compared with the beams strengthened with non-prestressed AFRP sheets,the initial cracking load of the beam strengthened with prestressed AFRP sheets is increased significantly,at the same time,the yield load and ultimate load are increased significantly;when the prestressed level of AFRP sheet is gradually increased,the shear bearing capacity of the strengthened beams is also gradually increased.
Based upon the experimental study on shear bearing capacity of seven strengthening RC beams using aramid fiber reinforced plastic(AFRP) sheets,the effects of different prestress levels and different shear strengthening measures on shear bearing capacity of RC strengthening beams were researched.The experimental results show that as compared with the beams strengthened with non-prestressed AFRP sheets,the initial cracking load of the beam strengthened with prestressed AFRP sheets is increased significantly,at the same time,the yield load and ultimate load are increased significantly;when the prestressed level of AFRP sheet is gradually increased,the shear bearing capacity of the strengthened beams is also gradually increased.
2006, 36(4): 23-25.
doi: 10.13204/j.gyjz200604007
Abstract:
Six concrete beams prestressed with bonded CFRP tendons under static monotonous loadings are tested.Combined with relevant test results at home and abroad,the calculation methods on prestressing loss of bonded CFRP tendons are studied,and the corresponding design suggestions are proposed.
Six concrete beams prestressed with bonded CFRP tendons under static monotonous loadings are tested.Combined with relevant test results at home and abroad,the calculation methods on prestressing loss of bonded CFRP tendons are studied,and the corresponding design suggestions are proposed.
2006, 36(4): 26-29.
doi: 10.13204/j.gyjz200604008
Abstract:
By analyzing the problems of today's architecture design and comparing the obvious environment of architecture with the recessive environment,it is shown that recessive environment of architecture has an important effect on people's health.And it is also pointed out that the only target of architecture design is to respect and have considerations for people's life.
By analyzing the problems of today's architecture design and comparing the obvious environment of architecture with the recessive environment,it is shown that recessive environment of architecture has an important effect on people's health.And it is also pointed out that the only target of architecture design is to respect and have considerations for people's life.
2006, 36(4): 30-33.
doi: 10.13204/j.gyjz200604009
Abstract:
Strategies of sustainable development must be implemented in the life cycle of the architecture for the realization of sustainable architectures. And it is also necessary to develop green technologies of construction and improve the laws and regulations for the government.
Strategies of sustainable development must be implemented in the life cycle of the architecture for the realization of sustainable architectures. And it is also necessary to develop green technologies of construction and improve the laws and regulations for the government.
2006, 36(4): 34-35,22.
doi: 10.13204/j.gyjz200604010
Abstract:
The functions of the enclosures for an industrial building are much higher than those of the outline,thermal insulation etc.They should also provide the functions and inter-face actions,such as landscape,ventilation,lighting heat insulation,space-separating and protection etc.It is pointed out that the designed enclosure should be adapted to the climate and external environment with a minimum energy consumption;and it does not rely on too much the region and climate.The suitable indoor space,production and living environments should also be realized by the enclosures designed through modern high-tech means.
The functions of the enclosures for an industrial building are much higher than those of the outline,thermal insulation etc.They should also provide the functions and inter-face actions,such as landscape,ventilation,lighting heat insulation,space-separating and protection etc.It is pointed out that the designed enclosure should be adapted to the climate and external environment with a minimum energy consumption;and it does not rely on too much the region and climate.The suitable indoor space,production and living environments should also be realized by the enclosures designed through modern high-tech means.
2006, 36(4): 36-39.
doi: 10.13204/j.gyjz200604011
Abstract:
Based on the experimental results of 16 steel reinforced concrete(SRC) short-columns,bond behavior between shaped steel and concrete is analyzed.It is also explored that the effects of concrete strength,the thickness of concrete cover,and the ratio of lateral stirrup on the bond behavior and ultimate bearing capacity of the short column subjected axial loads.Finite element model is set-up to further study bond-slip behavior between shaped steel and concrete,which would be a reference to calculate bond strength and ultimate bearing capacity of SRC columns subjected axial loads.
Based on the experimental results of 16 steel reinforced concrete(SRC) short-columns,bond behavior between shaped steel and concrete is analyzed.It is also explored that the effects of concrete strength,the thickness of concrete cover,and the ratio of lateral stirrup on the bond behavior and ultimate bearing capacity of the short column subjected axial loads.Finite element model is set-up to further study bond-slip behavior between shaped steel and concrete,which would be a reference to calculate bond strength and ultimate bearing capacity of SRC columns subjected axial loads.
2006, 36(4): 40-42,25.
doi: 10.13204/j.gyjz200604012
Abstract:
Aimed at the dynamical analysis of multifunctional vibration-absorption megaframe structure,this paper presented a bar-layer model of rigidity matrix easy to apply in the main frame.Moreover,this model is appropriately simplified.This study seems to indicate that this model has been relatively simple in calculation,and may be a practical method for computing the rigidity matrix of the main frame.
Aimed at the dynamical analysis of multifunctional vibration-absorption megaframe structure,this paper presented a bar-layer model of rigidity matrix easy to apply in the main frame.Moreover,this model is appropriately simplified.This study seems to indicate that this model has been relatively simple in calculation,and may be a practical method for computing the rigidity matrix of the main frame.
2006, 36(4): 43-45,29.
doi: 10.13204/j.gyjz200604013
Abstract:
Three schemes of core column,constructional column and constructional column combined with core column are applied to a 12-storeyed concrete small-size hollow block building in seismic regions of intensity 8,and each structure is computed,According to comparing and analyzing corresponding 6~(th)～11~(th) floor masonry building,the applicable bound of different structural designs is discussed,and some advices on core column and constructional column designs of using concrete small-size hollow blocks in seismic regions of intensity 8 are pointed out.
Three schemes of core column,constructional column and constructional column combined with core column are applied to a 12-storeyed concrete small-size hollow block building in seismic regions of intensity 8,and each structure is computed,According to comparing and analyzing corresponding 6~(th)～11~(th) floor masonry building,the applicable bound of different structural designs is discussed,and some advices on core column and constructional column designs of using concrete small-size hollow blocks in seismic regions of intensity 8 are pointed out.
2006, 36(4): 46-49.
doi: 10.13204/j.gyjz200604014
Abstract:
The temperature effects of a super-long building under the seasonal descending temperature action are studied.Having selected the Second Long-Distance Telecom Hinge in Zhengzhou as the calculating example,the finite element method is used for calculation and analysis to the whole structural temperature effects.The characteristics of the whole structural deformation,the scope and the distribution of the internal force or stress of each kind components under such a seasonal descending temperature case have been provided.It has been demonstrated that the seasonal descending action is a kind of more disadvantageous temperature load.These results offer some references for engineers and designers to take the temperature action into reasonable structural disposal.
The temperature effects of a super-long building under the seasonal descending temperature action are studied.Having selected the Second Long-Distance Telecom Hinge in Zhengzhou as the calculating example,the finite element method is used for calculation and analysis to the whole structural temperature effects.The characteristics of the whole structural deformation,the scope and the distribution of the internal force or stress of each kind components under such a seasonal descending temperature case have been provided.It has been demonstrated that the seasonal descending action is a kind of more disadvantageous temperature load.These results offer some references for engineers and designers to take the temperature action into reasonable structural disposal.
2006, 36(4): 50-51.
doi: 10.13204/j.gyjz200604015
Abstract:
The consolidation equation for saturation soil is solved by means of increment-dimensional precise integration method.A state equation expressed in displacement is deduced in detail,and the formula of displacement and pore fluid pressure are given.In the end,the results of one-dimensional consolidation settlement show that both its computational preciseness and computational effectiveness are very high.
The consolidation equation for saturation soil is solved by means of increment-dimensional precise integration method.A state equation expressed in displacement is deduced in detail,and the formula of displacement and pore fluid pressure are given.In the end,the results of one-dimensional consolidation settlement show that both its computational preciseness and computational effectiveness are very high.
2006, 36(4): 52-56.
doi: 10.13204/j.gyjz200604016
Abstract:
Taking some factors influencing mechanical behavior rules of a composite foundation of control settlement and sparse piles with caps into consideration,the mechanical behaviors have been analyzed by means of nonlinear finite element method(FEM),some basic rules of mechanical behaviors have been obtaind.The results can provide the useful guidance for the theory research,engineering design and construction.
Taking some factors influencing mechanical behavior rules of a composite foundation of control settlement and sparse piles with caps into consideration,the mechanical behaviors have been analyzed by means of nonlinear finite element method(FEM),some basic rules of mechanical behaviors have been obtaind.The results can provide the useful guidance for the theory research,engineering design and construction.
2006, 36(4): 57-60,84.
doi: 10.13204/j.gyjz200604017
Abstract:
Applying 2D elastoplastic numerical calculation method and under the conditions of surrounding rock from Grade Ⅲto Ⅴ,it is studied that the characteristics of stress and deformation of middle rock wall in parallelly laid twin tunnel.The research show that stress and deformation of middle rock wall are adverse to parallel tunnel with smaller interval and these locations are very critical for design,construction and monitoring measurements.At the same time,it is also studied that the effects of different buried depth and different reinforcing measures of rock wall on stress and deformation of the tunnels with small interval,which provides guidance to design of support,selection of excavation method,reinforcing method of rock wall and monitoring plans.
Applying 2D elastoplastic numerical calculation method and under the conditions of surrounding rock from Grade Ⅲto Ⅴ,it is studied that the characteristics of stress and deformation of middle rock wall in parallelly laid twin tunnel.The research show that stress and deformation of middle rock wall are adverse to parallel tunnel with smaller interval and these locations are very critical for design,construction and monitoring measurements.At the same time,it is also studied that the effects of different buried depth and different reinforcing measures of rock wall on stress and deformation of the tunnels with small interval,which provides guidance to design of support,selection of excavation method,reinforcing method of rock wall and monitoring plans.
2006, 36(4): 61-64.
doi: 10.13204/j.gyjz200604018
Abstract:
On the basis of the experimental study of the relevant relation of the intensity of concrete and resilience value of Yueyang Area,it is conducted that the test and comparison of the results of regression equation of various kinds of the regression of function models and precision as well as error,etc.The local curve for measuring strength of the regression method of exponential function is set up and its superiority is proved,the relevant relations under the influence of several kinds of factors between concrete intensity and resilience value are described.
On the basis of the experimental study of the relevant relation of the intensity of concrete and resilience value of Yueyang Area,it is conducted that the test and comparison of the results of regression equation of various kinds of the regression of function models and precision as well as error,etc.The local curve for measuring strength of the regression method of exponential function is set up and its superiority is proved,the relevant relations under the influence of several kinds of factors between concrete intensity and resilience value are described.
2006, 36(4): 65-67,92.
doi: 10.13204/j.gyjz200604019
Abstract:
The carbonation character and mechanism of cover concrete of reinforced concrete bridges in northwestern arid regions are discussed.Based on the data of concrete strength and depth of carbonation acquired from inspection in-site,the formula of life forecasting is put foreward.The accelerating carbonation of concrete test specimen was also done in the lab.The reasonable depth of concrete cover and concrete strength of railway bridges suitable for arid regions is given through regressive analysis
The carbonation character and mechanism of cover concrete of reinforced concrete bridges in northwestern arid regions are discussed.Based on the data of concrete strength and depth of carbonation acquired from inspection in-site,the formula of life forecasting is put foreward.The accelerating carbonation of concrete test specimen was also done in the lab.The reasonable depth of concrete cover and concrete strength of railway bridges suitable for arid regions is given through regressive analysis
2006, 36(4): 68-69,100.
doi: 10.13204/j.gyjz200604020
Abstract:
The thickness of concrete cover is related to bearing resistance capacity,endurance and fireproof property of concrete structures.The standard stipulates that structure test must include the thickness of concrete cover.It is done the testing and analyzing of the performance and precision of KON-RBL concrete cover tester,the regression equations are abtained,which are verifed in engineering practice.
The thickness of concrete cover is related to bearing resistance capacity,endurance and fireproof property of concrete structures.The standard stipulates that structure test must include the thickness of concrete cover.It is done the testing and analyzing of the performance and precision of KON-RBL concrete cover tester,the regression equations are abtained,which are verifed in engineering practice.
2006, 36(4): 70-72,90.
doi: 10.13204/j.gyjz200604021
Abstract:
It was tried to explain the significant influence of curing on cement hydration of concrete.The temperature and humidity of curing were the key factor that effected cement hydration.A good early curing could reduce autogenous shrinkage of high performance concrete.It was analysed structural characteristics of composition of high performance concrete and explained the curing features of this concrete.Thus one of the critical aspects for the successful usage of high performance concrete would be knowing how to cure it to achieve its full performance.It had long been recognized that adequate curing was to obtain the desired strength and durability properties of concrete.
It was tried to explain the significant influence of curing on cement hydration of concrete.The temperature and humidity of curing were the key factor that effected cement hydration.A good early curing could reduce autogenous shrinkage of high performance concrete.It was analysed structural characteristics of composition of high performance concrete and explained the curing features of this concrete.Thus one of the critical aspects for the successful usage of high performance concrete would be knowing how to cure it to achieve its full performance.It had long been recognized that adequate curing was to obtain the desired strength and durability properties of concrete.
2006, 36(4): 73-74.
doi: 10.13204/j.gyjz200604022
Abstract:
Research achievements of seismic behavior of anchors at home and abroad are presented.Experimental results show that the tensile or shear capacity of anchors under dynamic loading increases as compared with static loading.The effect of cracked concrete and reinforcements on the earthquake-resistance capability of anchor is discussed,the seismic behavior of anchor in cracked concrete is reduced and close reinforcements significantly increase the seismic behavior of anchor.At last some advices are given for further research.
Research achievements of seismic behavior of anchors at home and abroad are presented.Experimental results show that the tensile or shear capacity of anchors under dynamic loading increases as compared with static loading.The effect of cracked concrete and reinforcements on the earthquake-resistance capability of anchor is discussed,the seismic behavior of anchor in cracked concrete is reduced and close reinforcements significantly increase the seismic behavior of anchor.At last some advices are given for further research.
2006, 36(4): 75-77,87.
doi: 10.13204/j.gyjz200604023
Abstract:
The general situation of earthquake-resistant behavior experiments of high concrete columns reinforced with concrete filled steel tube is presented.Based on the experimental results,the numerical analysis of load-moment interaction diagram for the columns is completed using strip finite element analysis method.The calculation results are in basic agreement with those of the experimental values,so the numerical analysis method can be used to determine the ultimate bearing capacity of the columns under eccentric compression.
The general situation of earthquake-resistant behavior experiments of high concrete columns reinforced with concrete filled steel tube is presented.Based on the experimental results,the numerical analysis of load-moment interaction diagram for the columns is completed using strip finite element analysis method.The calculation results are in basic agreement with those of the experimental values,so the numerical analysis method can be used to determine the ultimate bearing capacity of the columns under eccentric compression.
2006, 36(4): 78-80.
doi: 10.13204/j.gyjz200604024
Abstract:
In order to study the behavior of shear bond at the interface of Concrete-Filled Steel Tubes(CFST),and the influence of section types on the behavior,11 repeated push-out tests were carried out,including 5 circular and 6 square CFST specimens.Based on tests results,the composing of shear bond force,failure mode and the factors of effect on the shear bond strength are analyzed.Tests results indicate that the shear bond force-slip curves of circular CFST specimens are similar to the square one.The shear bond strength of circular CFST is great than the square one,and is not considerably affected by the concrete strength.
In order to study the behavior of shear bond at the interface of Concrete-Filled Steel Tubes(CFST),and the influence of section types on the behavior,11 repeated push-out tests were carried out,including 5 circular and 6 square CFST specimens.Based on tests results,the composing of shear bond force,failure mode and the factors of effect on the shear bond strength are analyzed.Tests results indicate that the shear bond force-slip curves of circular CFST specimens are similar to the square one.The shear bond strength of circular CFST is great than the square one,and is not considerably affected by the concrete strength.
2006, 36(4): 81-84.
doi: 10.13204/j.gyjz200604025
Abstract:
Based on the second-order analysis of elastic element stiffness matrix considering connection's flexibility and second-order effect,a finite element method is used to study free vibration of semi-rigid steel frame.Through the comparison of examples' natural frequency,different factors influencing free vibration analysis are discussed.
Based on the second-order analysis of elastic element stiffness matrix considering connection's flexibility and second-order effect,a finite element method is used to study free vibration of semi-rigid steel frame.Through the comparison of examples' natural frequency,different factors influencing free vibration analysis are discussed.
2006, 36(4): 85-87.
doi: 10.13204/j.gyjz200604026
Abstract:
The stress and deflection of the continuous main-beam in a light steel structure floors are studied,by means of structure test methods and theory a three-span method.The actual deflection formulas for the middle section of a three-span continuous steel beam are obtained.Making use of standard FEM programs,the theoretical and testing formulas are verified.The causes of differences by two researching methods are also revealed.This research has valuable information on designing new structures and supervising old structures in service.
The stress and deflection of the continuous main-beam in a light steel structure floors are studied,by means of structure test methods and theory a three-span method.The actual deflection formulas for the middle section of a three-span continuous steel beam are obtained.Making use of standard FEM programs,the theoretical and testing formulas are verified.The causes of differences by two researching methods are also revealed.This research has valuable information on designing new structures and supervising old structures in service.
2006, 36(4): 88-90.
doi: 10.13204/j.gyjz200604027
Abstract:
The concrete-replacing method is often used for concrete structures,whose grade of concrete strength is on the low side.It is especially suitable for the structures with the grade of concrete strength being less than(C10),where it is very difficult for other strengthening methods to be used.This method can solve the problem of low strength concrete in the compression zone of bearing members.It is mainly introduced the use of the concrete-replacing method in strengthening frame-column projects.
The concrete-replacing method is often used for concrete structures,whose grade of concrete strength is on the low side.It is especially suitable for the structures with the grade of concrete strength being less than(C10),where it is very difficult for other strengthening methods to be used.This method can solve the problem of low strength concrete in the compression zone of bearing members.It is mainly introduced the use of the concrete-replacing method in strengthening frame-column projects.
2006, 36(4): 91-92.
doi: 10.13204/j.gyjz200604028
Abstract:
A new way of imposing power is introduced through describing several common methods of imposing power for translational motion of integral buildings and their existing disadvantages.
A new way of imposing power is introduced through describing several common methods of imposing power for translational motion of integral buildings and their existing disadvantages.
2006, 36(4): 93-94.
doi: 10.13204/j.gyjz200604029
Abstract:
The sudden collapse of a single-floor factory building with steel-wood roof was studied.According to the structural inspection and theoretical analysis of the steel-wood roof and masonry wall,the reason was given at last,which may be a reference for the design and construction of similar projects.
The sudden collapse of a single-floor factory building with steel-wood roof was studied.According to the structural inspection and theoretical analysis of the steel-wood roof and masonry wall,the reason was given at last,which may be a reference for the design and construction of similar projects.
2006, 36(4): 95-98.
doi: 10.13204/j.gyjz200604030
Abstract:
Deep excavation in a city faces the strict environmental demands and unconventional excavated sections.And the files for the underground of the surroundings are often absent.A case study in Beijing is introduced.During excavation,the retaining structure was modified two times based on the original design and construction conditions.Three schemes of the retaining structure are calculated by plane finite element method.The monitoring records of horizontal deformation are compared with the results of FEM.It is emphasized that more attention should be paid to the files of the underground engineering.Meanwhile,the design of the retaining structure must be corresponded with the surroundings of the construction.
Deep excavation in a city faces the strict environmental demands and unconventional excavated sections.And the files for the underground of the surroundings are often absent.A case study in Beijing is introduced.During excavation,the retaining structure was modified two times based on the original design and construction conditions.Three schemes of the retaining structure are calculated by plane finite element method.The monitoring records of horizontal deformation are compared with the results of FEM.It is emphasized that more attention should be paid to the files of the underground engineering.Meanwhile,the design of the retaining structure must be corresponded with the surroundings of the construction.
2006, 36(4): 99-100.
doi: 10.13204/j.gyjz200604031
Abstract:
Based on the observations of participating in Guangzhou's Top Housing Layout Competition,this paper points out in the light of the social attributes the well-sold housing complexes do not necessarily have good layouts.The misconceptions of in the design of housing layout in China have also been analyzed according to the advanced model,national and local residence style in the developed countries.
Based on the observations of participating in Guangzhou's Top Housing Layout Competition,this paper points out in the light of the social attributes the well-sold housing complexes do not necessarily have good layouts.The misconceptions of in the design of housing layout in China have also been analyzed according to the advanced model,national and local residence style in the developed countries.
