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2006 Vol. 36, No. 7
Display Method:
2006, 36(7): 1-6.
doi: 10.13204/j.gyjz200607001
Abstract:
Based on theoretical analysis and experimental research, a structure formation model of stabilized soil is verified.The model shows that: 1) structure of the stabilized soil from silt is formed by hydrates, which are generated by hardening agent hydration, wrapping and cementing soil particles and filling pores among the particles; 2) structure of the stabilized soil formed from clayey soil is formed by the hydrates wrapping and cementing clay particle groups, filling pores among the groups, and squeezing and filling pores in the groups. By the model, the relationship between dosage and varieties of hardening agent and the strength increasing law of stabilized soil can be interpreted reasonably. The model revealed that different kinds of hydrates should be generated by hardening agent for different kind of soil, which is of important guiding significance for optimization design of hardening agent
Based on theoretical analysis and experimental research, a structure formation model of stabilized soil is verified.The model shows that: 1) structure of the stabilized soil from silt is formed by hydrates, which are generated by hardening agent hydration, wrapping and cementing soil particles and filling pores among the particles; 2) structure of the stabilized soil formed from clayey soil is formed by the hydrates wrapping and cementing clay particle groups, filling pores among the groups, and squeezing and filling pores in the groups. By the model, the relationship between dosage and varieties of hardening agent and the strength increasing law of stabilized soil can be interpreted reasonably. The model revealed that different kinds of hydrates should be generated by hardening agent for different kind of soil, which is of important guiding significance for optimization design of hardening agent
2006, 36(7): 7-12,18.
doi: 10.13204/j.gyjz200607002
Abstract:
A stabilized-soil structure formation model is proposed. Based on the model, hydrates varieties required to form optimum structure of the stabilized soil are suggested. Also the influence of some chemical factors in soils on hydrates growing in the stabilized soil is discussed and the resolvent is given. Based on the above research, an optimization design method is proposed, with which stabilizer can be designed according to characteristics of soil samples
A stabilized-soil structure formation model is proposed. Based on the model, hydrates varieties required to form optimum structure of the stabilized soil are suggested. Also the influence of some chemical factors in soils on hydrates growing in the stabilized soil is discussed and the resolvent is given. Based on the above research, an optimization design method is proposed, with which stabilizer can be designed according to characteristics of soil samples
A METHOD OF DESIGNING HARDENING AGENT FOR SOFT SOIL ACCORDING TO CHARACTERISTICS OF THE SOIL SAMPLES
2006, 36(7): 13-18.
doi: 10.13204/j.gyjz200607003
Abstract:
According to the structure formation model of stabilized soil, it is proposed that the hardening agent for stabilizing soft soil should generate cementitious hydrates to bind soil particles and expanding hydrates to fill pores in the stabilized soil; calculation formulas are developed, by which dosage of components constituting hardening agent can becalculated according to characteristics of the soil. The experiment results proved that the dosages of optimal hardening agent components obtained from the experiment were close to those calculated with the formulas, and the effect of the stabilized soil stabilized by the hardening agent designed by this method were much higher than that stabilized by cement.
According to the structure formation model of stabilized soil, it is proposed that the hardening agent for stabilizing soft soil should generate cementitious hydrates to bind soil particles and expanding hydrates to fill pores in the stabilized soil; calculation formulas are developed, by which dosage of components constituting hardening agent can becalculated according to characteristics of the soil. The experiment results proved that the dosages of optimal hardening agent components obtained from the experiment were close to those calculated with the formulas, and the effect of the stabilized soil stabilized by the hardening agent designed by this method were much higher than that stabilized by cement.
2006, 36(7): 19-24.
doi: 10.13204/j.gyjz200607004
Abstract:
At same cement content, strength difference between stabilized soil samples prepared from different soil samples with similar physical characteristics obviously. Pore solution were squeezed from the stabilized soil samples with various cement contents, concentration of ions in the solution and strength of the stabilized soil samples were measured. The result shows that due to soil absorbing of Ca( OH) 2, the concentration of Ca( OH) 2in the pore solution may not reach to saturation, in turn the CSH gel generated by cement hydration may decrease; the higher the amount of Ca( OH)2absorbedby soil, the less CSH gel generated by same dosage of cement, so the poorer the strength of the stabilized soil sample. The influence of various chemical characteristics of soil on the strength of the stabilized soil is boiled down to the influence on the concentration of Ca( OH) 2in the pore solution. The strength of stabilized soil samples made from different soil samples with similar physical characteristics are almost the same when the concentration of Ca( OH) 22in the pore solution reach to saturation.
At same cement content, strength difference between stabilized soil samples prepared from different soil samples with similar physical characteristics obviously. Pore solution were squeezed from the stabilized soil samples with various cement contents, concentration of ions in the solution and strength of the stabilized soil samples were measured. The result shows that due to soil absorbing of Ca( OH) 2, the concentration of Ca( OH) 2in the pore solution may not reach to saturation, in turn the CSH gel generated by cement hydration may decrease; the higher the amount of Ca( OH)2absorbedby soil, the less CSH gel generated by same dosage of cement, so the poorer the strength of the stabilized soil sample. The influence of various chemical characteristics of soil on the strength of the stabilized soil is boiled down to the influence on the concentration of Ca( OH) 2in the pore solution. The strength of stabilized soil samples made from different soil samples with similar physical characteristics are almost the same when the concentration of Ca( OH) 22in the pore solution reach to saturation.
2006, 36(7): 25-28,40.
doi: 10.13204/j.gyjz200607005
Abstract:
As cement contents increase,the stronger the strength of cement-loess becomes. Wherever,incremental extent of strength of cement-loess with cement contents increment becomes bigger when cement contents are little and vice versa.Latter-day strength of cement-loess is worthy of being expected when cement contents are big or dropping energy is big.The effect of side-stress to improve cement-loess axial compressive strength is little.The effect of cement content to the optimization water-ratio and the biggest dry-density of cement-loess is also little.Water-stability of cement-loess(especially cement contents are big) is good.There are many new crystal-substances which are created in the cement-loess.The factors to affect cement-loess strength include ingredients of every crystal-substance content.From the constitutive relation of cement-loess,cement-loess has a critical cement content(about 12%).When cement contents are higher than the critical cement content,cement-loess becomes a brittle material through destruction-strain and distortion-module of cement-loess.
As cement contents increase,the stronger the strength of cement-loess becomes. Wherever,incremental extent of strength of cement-loess with cement contents increment becomes bigger when cement contents are little and vice versa.Latter-day strength of cement-loess is worthy of being expected when cement contents are big or dropping energy is big.The effect of side-stress to improve cement-loess axial compressive strength is little.The effect of cement content to the optimization water-ratio and the biggest dry-density of cement-loess is also little.Water-stability of cement-loess(especially cement contents are big) is good.There are many new crystal-substances which are created in the cement-loess.The factors to affect cement-loess strength include ingredients of every crystal-substance content.From the constitutive relation of cement-loess,cement-loess has a critical cement content(about 12%).When cement contents are higher than the critical cement content,cement-loess becomes a brittle material through destruction-strain and distortion-module of cement-loess.
2006, 36(7): 29-31,24.
doi: 10.13204/j.gyjz200607006
Abstract:
There are some questions of stabilizing some red clay foundations with only cement.The method of utilizing cement and additional flyash is considered to stabilize red clay.Through the laboratory experiment compressive strength of red clay sample with different mixing ratio of cement and flyash is tested at different ages,and the reinforced mechanism of cement and flyash on red clay is analyzed and probed.The results show that the strength of stabilized soil is increased with the increase of cement and flyash mixing ratio and curing age.Furthermore,cement and flyash affect the sample strength differently at early,middle and later curing ages.
There are some questions of stabilizing some red clay foundations with only cement.The method of utilizing cement and additional flyash is considered to stabilize red clay.Through the laboratory experiment compressive strength of red clay sample with different mixing ratio of cement and flyash is tested at different ages,and the reinforced mechanism of cement and flyash on red clay is analyzed and probed.The results show that the strength of stabilized soil is increased with the increase of cement and flyash mixing ratio and curing age.Furthermore,cement and flyash affect the sample strength differently at early,middle and later curing ages.
2006, 36(7): 32-34.
doi: 10.13204/j.gyjz200607007
Abstract:
HAS stabilizer is a slag cementitious material,which is mainly composed of slag and slag composite(over 80%),as well a proper dosage of active agent.It is introduced in detail that the basic properties of HAS stabilizer and its use in ash dam project,water presources and hydro power project and foundation project treatment etc.The applicability of HAS stabilizer is further indicated by laboratory test and analysis of project use,which provides a basis for developing soil stabilization technology.
HAS stabilizer is a slag cementitious material,which is mainly composed of slag and slag composite(over 80%),as well a proper dosage of active agent.It is introduced in detail that the basic properties of HAS stabilizer and its use in ash dam project,water presources and hydro power project and foundation project treatment etc.The applicability of HAS stabilizer is further indicated by laboratory test and analysis of project use,which provides a basis for developing soil stabilization technology.
2006, 36(7): 35-37,44.
doi: 10.13204/j.gyjz200607008
Abstract:
In order to discuss the stabilization effect of useing HAS stabilizer to reinforce the Pearl River channel dredged sediments,the tests on the compaction,unconfined compressive strength and impermeability of stabilized sediment have been made.The results indicate that adding HAS stabilizer can improve the physico-mechanical performances of the dreged sediment.The compactibility, impermeability and strength are improve notably.A prediction equation is developed to calculate the strength of stabilized sediment by analyzing the experimental data.It can be used for reference in engineering practice.
In order to discuss the stabilization effect of useing HAS stabilizer to reinforce the Pearl River channel dredged sediments,the tests on the compaction,unconfined compressive strength and impermeability of stabilized sediment have been made.The results indicate that adding HAS stabilizer can improve the physico-mechanical performances of the dreged sediment.The compactibility, impermeability and strength are improve notably.A prediction equation is developed to calculate the strength of stabilized sediment by analyzing the experimental data.It can be used for reference in engineering practice.
2006, 36(7): 38-40.
doi: 10.13204/j.gyjz200607009
Abstract:
Overwetted soil is mixed with 3%,4% by HAS soil stabilizer,mechanical indexes of stabilized soil such as,the compaction,CBR and unconfined compressive strength were measured.Results show that the mechanical behaviors of stabilized overwetted soil meet completely the requirements of filling materials in road bed.Besides,the chemical mechanism of stabilized overwetted soil by HAS stabilizer was explored with the XRD analysis.
Overwetted soil is mixed with 3%,4% by HAS soil stabilizer,mechanical indexes of stabilized soil such as,the compaction,CBR and unconfined compressive strength were measured.Results show that the mechanical behaviors of stabilized overwetted soil meet completely the requirements of filling materials in road bed.Besides,the chemical mechanism of stabilized overwetted soil by HAS stabilizer was explored with the XRD analysis.
2006, 36(7): 41-44.
doi: 10.13204/j.gyjz200607010
Abstract:
The principles of saving energy and heat transfer procedure of ventilation double-skin glass curtain wall are analyzed emphatically.A CFD fluid model is used for simulating heat transfer procedure of ventilation double-skin glass curtain wall.Based on which the principles of saving energy are verified and the thermal transfer coefficient for whole curtain wall,which provide a calculation foundation for thermal design,is educed by the simulation.Finally some corresponding suggestions are put forward.
The principles of saving energy and heat transfer procedure of ventilation double-skin glass curtain wall are analyzed emphatically.A CFD fluid model is used for simulating heat transfer procedure of ventilation double-skin glass curtain wall.Based on which the principles of saving energy are verified and the thermal transfer coefficient for whole curtain wall,which provide a calculation foundation for thermal design,is educed by the simulation.Finally some corresponding suggestions are put forward.
2006, 36(7): 45-48,102.
doi: 10.13204/j.gyjz200607011
Abstract:
The usual capacity spectrum method of structural seismic performance evaluation can only consider the first response mode of structures,and the influence of high modes can not be taken into account,so the error is introduced.A new type of equivalent single-degree-of-freedom(SDOF) is set up using the equivalent mode and equivalent mode participation coefficient.Then the capacity spectrum method is used to evaluate the seismic performance of structures.The method can avoid the nonlinear dynamic time-history analysis,and can get more seismic information on structures comparing with the latter.The example analysis shows that the high modes have little influence on the structural response in the elastic stage but have major influence in the inelastic stage,and the example also shows that the response obtained using the usual capacity method is smaller than the actual response of structures,so it biases toward the insecurity,while the rational result can be got by the improved capacity spectrum method aseismic.
The usual capacity spectrum method of structural seismic performance evaluation can only consider the first response mode of structures,and the influence of high modes can not be taken into account,so the error is introduced.A new type of equivalent single-degree-of-freedom(SDOF) is set up using the equivalent mode and equivalent mode participation coefficient.Then the capacity spectrum method is used to evaluate the seismic performance of structures.The method can avoid the nonlinear dynamic time-history analysis,and can get more seismic information on structures comparing with the latter.The example analysis shows that the high modes have little influence on the structural response in the elastic stage but have major influence in the inelastic stage,and the example also shows that the response obtained using the usual capacity method is smaller than the actual response of structures,so it biases toward the insecurity,while the rational result can be got by the improved capacity spectrum method aseismic.
2006, 36(7): 49-52.
doi: 10.13204/j.gyjz200607012
Abstract:
Based on studying the earthquake disaster prediction of building structures and combined with their past earthquake disaster data and seismic design experience,seismic behavior of building structures is evaluated and compared also.In accordance with the particular characteristics of multi-story residence buildings of different structures,their seimic disasters in the future are studied and some suggestions on seismic design are given at last.Which could provide reference for designers.
Based on studying the earthquake disaster prediction of building structures and combined with their past earthquake disaster data and seismic design experience,seismic behavior of building structures is evaluated and compared also.In accordance with the particular characteristics of multi-story residence buildings of different structures,their seimic disasters in the future are studied and some suggestions on seismic design are given at last.Which could provide reference for designers.
2006, 36(7): 53-56.
doi: 10.13204/j.gyjz200607013
Abstract:
Based on the experimental study of 4 high strength concrete(HSC) shear walls(normal and vertical seams' shear walls) subjected to vertical force and low-cyclic load,the effects of the vertical seams on horizontal bearing capacity of wall are analyzed.On the basis of its forced features and experimental results,the bearing capacity' calculating model of the vertical seams shear walls is presented,the practical formula is deduced and the design method is proposed, this offers the reference for engineering design and research.
Based on the experimental study of 4 high strength concrete(HSC) shear walls(normal and vertical seams' shear walls) subjected to vertical force and low-cyclic load,the effects of the vertical seams on horizontal bearing capacity of wall are analyzed.On the basis of its forced features and experimental results,the bearing capacity' calculating model of the vertical seams shear walls is presented,the practical formula is deduced and the design method is proposed, this offers the reference for engineering design and research.
2006, 36(7): 57-58.
doi: 10.13204/j.gyjz200607014
Abstract:
Starting from the mechanism producing the secondary moment,it was analyzed the influences of the secondary moment on the ultimate load and the internal force redistribution of PPC continuous beams;and it was obtained the conclusions that the influence of the secondary moment may not be considered at lower reinforcement ratio,but can not be neglected at higer reinforcement ratio because of the poorer rotational capacity of plastic hinge.Secondary moment can improve the rotational capacity of plastic hinge in PPC continuous beams of straight rainforcement;and the moment redistribution can be improved.
Starting from the mechanism producing the secondary moment,it was analyzed the influences of the secondary moment on the ultimate load and the internal force redistribution of PPC continuous beams;and it was obtained the conclusions that the influence of the secondary moment may not be considered at lower reinforcement ratio,but can not be neglected at higer reinforcement ratio because of the poorer rotational capacity of plastic hinge.Secondary moment can improve the rotational capacity of plastic hinge in PPC continuous beams of straight rainforcement;and the moment redistribution can be improved.
2006, 36(7): 59-61,56.
doi: 10.13204/j.gyjz200607015
Abstract:
The measures of decreasing the building cost by reducing the reinforcements dosage of its structure are presented.It is advised to decrease the building cost by adopting HRB400 reinforcements in a big way and the rational structure system,as well as controlling the different aspects of structure.In addition,the method of decreasing the reinforcements dosage of floor slab by several aspects of floor slab design is put forward.
The measures of decreasing the building cost by reducing the reinforcements dosage of its structure are presented.It is advised to decrease the building cost by adopting HRB400 reinforcements in a big way and the rational structure system,as well as controlling the different aspects of structure.In addition,the method of decreasing the reinforcements dosage of floor slab by several aspects of floor slab design is put forward.
2006, 36(7): 62-64,94.
doi: 10.13204/j.gyjz200607016
Abstract:
Based on the relaxation experiments of AFRP tendons for half a year,the variation regularities of the relaxation rate according to time of one kind of AFRP,FA11,are studied.The results indicate that the relaxation of AFRP is obvious,and the relaxation rate linearly depends on time and is in direct ratio with tension control stress.
Based on the relaxation experiments of AFRP tendons for half a year,the variation regularities of the relaxation rate according to time of one kind of AFRP,FA11,are studied.The results indicate that the relaxation of AFRP is obvious,and the relaxation rate linearly depends on time and is in direct ratio with tension control stress.
2006, 36(7): 65-67,74.
doi: 10.13204/j.gyjz200607017
Abstract:
The whole-course of autogenous shrinkage deformation of high performance cement based materials was in vestigated by stages with the combining of volume measurement and length measurement.The effects of the type of mineral admixtures,including fly ash and ground blast furnace slag,addition rate and fineness on the autogenous shrinkage were studied.The mechanism was discussed on the basis of capillary tension theory.
The whole-course of autogenous shrinkage deformation of high performance cement based materials was in vestigated by stages with the combining of volume measurement and length measurement.The effects of the type of mineral admixtures,including fly ash and ground blast furnace slag,addition rate and fineness on the autogenous shrinkage were studied.The mechanism was discussed on the basis of capillary tension theory.
2006, 36(7): 68-70,99.
doi: 10.13204/j.gyjz200607018
Abstract:
Through a great deal of experiments,the durability of HPC with artificial sand are studied systematically.Impermeability,freezing resistance and chloride ion diffusion are tested.On the basis of these tests,the correlative mechanisms are discussed.The result shows that artificial sand HPC has excellent durability,artificial sand can replace natural sand in producting HPC.
Through a great deal of experiments,the durability of HPC with artificial sand are studied systematically.Impermeability,freezing resistance and chloride ion diffusion are tested.On the basis of these tests,the correlative mechanisms are discussed.The result shows that artificial sand HPC has excellent durability,artificial sand can replace natural sand in producting HPC.
2006, 36(7): 71-74.
doi: 10.13204/j.gyjz200607019
Abstract:
It is introduced that the basic principles of study on multi_function magnestite compound wallboard,the raw materials,production technique,technical property and structural theory of such wallboard.The excellent technical property of the wallboard has a great importance to reforming the traditional wall materials,replacing the traditional sintered clay bricks,using industrial wastes,and energy_saving.
It is introduced that the basic principles of study on multi_function magnestite compound wallboard,the raw materials,production technique,technical property and structural theory of such wallboard.The excellent technical property of the wallboard has a great importance to reforming the traditional wall materials,replacing the traditional sintered clay bricks,using industrial wastes,and energy_saving.
2006, 36(7): 75-78.
doi: 10.13204/j.gyjz200607020
Abstract:
The behaviour of two H_section steel columns under fire is investigated.All columns are full scale with(3 300mm) length under axial restraint.From the test results,the regularities of lateral deflection and axial restraint force are presented.The test results show that the behaviour of steel columns under fire is influenced by restrained thermal elongation.Limit temperature decreases if steel columns are subject to fire again.Which provides a basis for further research to explore fire behaviours of steel structures.
The behaviour of two H_section steel columns under fire is investigated.All columns are full scale with(3 300mm) length under axial restraint.From the test results,the regularities of lateral deflection and axial restraint force are presented.The test results show that the behaviour of steel columns under fire is influenced by restrained thermal elongation.Limit temperature decreases if steel columns are subject to fire again.Which provides a basis for further research to explore fire behaviours of steel structures.
THE EFFECT OF FACTURE AND FIXING ERROR ON BEARING CAPACITY OF COLD-FORMED THIN-WALLED C STEEL COLUMN
2006, 36(7): 79-82,78.
doi: 10.13204/j.gyjz200607021
Abstract:
Based on the column deflection curve method(CDC method),it was analyzed the effect of facture and fixing error(initial bend and initial eccentricity) on the bearing capactiy of cold_formed thin_walled C steel column.Considering the effect of effective section and using mutable rigid member as model,it was calculated the change of column curves when the initial bend and eccentricity was H/1000,H/750 and H/500 respectively.According to the result,it was also advised to relax the limit of the facture and fixing error of cold_formed thin_walled steel member.
Based on the column deflection curve method(CDC method),it was analyzed the effect of facture and fixing error(initial bend and initial eccentricity) on the bearing capactiy of cold_formed thin_walled C steel column.Considering the effect of effective section and using mutable rigid member as model,it was calculated the change of column curves when the initial bend and eccentricity was H/1000,H/750 and H/500 respectively.According to the result,it was also advised to relax the limit of the facture and fixing error of cold_formed thin_walled steel member.
2006, 36(7): 83-86.
doi: 10.13204/j.gyjz200607022
Abstract:
WEB light_gauge steel joist system(WEB Steel) is a new type of light steel structure.Because the current structural software in China can't be directly used to design and analyze this kind of structure,the Finite Element Method is the suitable method for the structural analysis of WEB Steel.The structural composition and construction of WEB Steel are introduced and the building technique of finite element model is provided.Taking a five-storey classroom building as an example,the horizontal displacement of the building under the wind load and earthquake was analyzed using ABAQUS 6.4 software,which was compared with the code value.Based on the simplified building method of finite element model,the inter-storey and top horizontal displacement can be smaller than the code values for the five-storey WEB steel building under the wind load and earthquake.
WEB light_gauge steel joist system(WEB Steel) is a new type of light steel structure.Because the current structural software in China can't be directly used to design and analyze this kind of structure,the Finite Element Method is the suitable method for the structural analysis of WEB Steel.The structural composition and construction of WEB Steel are introduced and the building technique of finite element model is provided.Taking a five-storey classroom building as an example,the horizontal displacement of the building under the wind load and earthquake was analyzed using ABAQUS 6.4 software,which was compared with the code value.Based on the simplified building method of finite element model,the inter-storey and top horizontal displacement can be smaller than the code values for the five-storey WEB steel building under the wind load and earthquake.
2006, 36(7): 87-88,91.
doi: 10.13204/j.gyjz200607023
Abstract:
It is proposed a method to estimate the section features of a curves structural member mainly based on the relevant curve of the bearing capacity of the curved member.It can increase the accuracy of the selected section and reduce the trial calculating number of times.This simplified the calculation of the curved member.
It is proposed a method to estimate the section features of a curves structural member mainly based on the relevant curve of the bearing capacity of the curved member.It can increase the accuracy of the selected section and reduce the trial calculating number of times.This simplified the calculation of the curved member.
2006, 36(7): 89-91.
doi: 10.13204/j.gyjz200607024
Abstract:
In accordance with the characteristics of Near-Surface Mounted(NSM) method,four beams are experimented strengthened with NSM Concrete Fiber Reinforced Polymer(CFRP) laminates.The results show that NSM CFRP can remarkably improve the bearing-capacity and stiffness of RC beams,it can also effectively restrict the crack,and CFRP laminates also share force with concrete and steel bar.NSM CFRP is more effective than EBR CFRP,and the use of the CFRP laminates is more effective strengthened with NSM.NSM method is a new way of strengthening,and it has a wide apply.
In accordance with the characteristics of Near-Surface Mounted(NSM) method,four beams are experimented strengthened with NSM Concrete Fiber Reinforced Polymer(CFRP) laminates.The results show that NSM CFRP can remarkably improve the bearing-capacity and stiffness of RC beams,it can also effectively restrict the crack,and CFRP laminates also share force with concrete and steel bar.NSM CFRP is more effective than EBR CFRP,and the use of the CFRP laminates is more effective strengthened with NSM.NSM method is a new way of strengthening,and it has a wide apply.
2006, 36(7): 92-94.
doi: 10.13204/j.gyjz200607025
Abstract:
A steel factory building has been used for over forty years and the crane system was damaged seriously.The renovation of the factory leads to raising the carrying capacity of the crane and their girders.The crane system was inspected and dynamic test was performed on the crane girders to obtain their deflection and stress.The load bearing capacities and deflection of the steel crane girders were calculated.Based on the inspection,dynamic test in site and calculation results,reinforcement measures for the crane system were proposed.Two strengthening methods of the steel crane girders by adding steel truss and I-shaped steel beam underneath the existing girders were presented.
A steel factory building has been used for over forty years and the crane system was damaged seriously.The renovation of the factory leads to raising the carrying capacity of the crane and their girders.The crane system was inspected and dynamic test was performed on the crane girders to obtain their deflection and stress.The load bearing capacities and deflection of the steel crane girders were calculated.Based on the inspection,dynamic test in site and calculation results,reinforcement measures for the crane system were proposed.Two strengthening methods of the steel crane girders by adding steel truss and I-shaped steel beam underneath the existing girders were presented.
2006, 36(7): 95-96,104.
doi: 10.13204/j.gyjz200607026
Abstract:
Concrete structure strengthened with carbon fiber reinforced plastic is a new retrofit method in the field of civil engineering.A 110kV transformer substation capacitor exploded,which resulted in damages to frame beams by fire.The safety of the structure was endangered.By analyzing many schemes, as a result carbon fiber reinforced plastic was used to strengthen the frame beams.
Concrete structure strengthened with carbon fiber reinforced plastic is a new retrofit method in the field of civil engineering.A 110kV transformer substation capacitor exploded,which resulted in damages to frame beams by fire.The safety of the structure was endangered.By analyzing many schemes, as a result carbon fiber reinforced plastic was used to strengthen the frame beams.
2006, 36(7): 97-99.
doi: 10.13204/j.gyjz200607027
Abstract:
The sustainable idea of industry,live and the ecosystem integrated in the whole turn is developed in the planning of Fuma Industrial Districts;at the time of meeting the modern industrial function demands,it also pays attention to the protection and usage of the natural environment,the consummation of city function,the construction of landscape under an ecological way.
The sustainable idea of industry,live and the ecosystem integrated in the whole turn is developed in the planning of Fuma Industrial Districts;at the time of meeting the modern industrial function demands,it also pays attention to the protection and usage of the natural environment,the consummation of city function,the construction of landscape under an ecological way.
2006, 36(7): 100-102.
doi: 10.13204/j.gyjz200607028
Abstract:
Through the planning for First Affiliated Hospital of Nantong Medical College,rebuilding and expansion of urban hospitals were considered rationally.With the aim to build a modern hospital and establish an environment which focues on patients and is convenient for medical workers,complicated functions and layout of a hospital,treamline and traffic organization,as well as environmental space were all perfected ceaselessly.
Through the planning for First Affiliated Hospital of Nantong Medical College,rebuilding and expansion of urban hospitals were considered rationally.With the aim to build a modern hospital and establish an environment which focues on patients and is convenient for medical workers,complicated functions and layout of a hospital,treamline and traffic organization,as well as environmental space were all perfected ceaselessly.
2006, 36(7): 103-104.
doi: 10.13204/j.gyjz200607029
Abstract:
It is conducted a scheme comparison between prestressed concrete floor and plain concrete floor for an underground garage.It has been found out that using a prestressed concrete flat slab floor can decrease the thickness of the floor slab,improve forced property and service functions of the structure,and so as to save materials,reduce cost and prevent the cracks of shrinkage and temperature.
It is conducted a scheme comparison between prestressed concrete floor and plain concrete floor for an underground garage.It has been found out that using a prestressed concrete flat slab floor can decrease the thickness of the floor slab,improve forced property and service functions of the structure,and so as to save materials,reduce cost and prevent the cracks of shrinkage and temperature.
2006, 36(7): 105-107.
doi: 10.13204/j.gyjz200607030
Abstract:
It is analysed the method and main points of architectural design in expressway serving area,from use of ecological technology,the requirements of function streamline and creation of marking form,it is also explored the sustainable developing direction of the buildings in the expressway serving areas in the future.
It is analysed the method and main points of architectural design in expressway serving area,from use of ecological technology,the requirements of function streamline and creation of marking form,it is also explored the sustainable developing direction of the buildings in the expressway serving areas in the future.
