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2009 Vol. 39, No. 3
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2009, 39(3): 1-3.
doi: 10.13204/j.gyjz200903001
Abstract:
On the basis of researching the planning and construction of a high??tech industrial park in BDA in recent years, summarized that the new features of a modern high-tech industrial park planning, and is explored the developing trend of its planning and design, combined with the recent corresponding park planning and construction of related projects, the above aspects are also summatrized.
On the basis of researching the planning and construction of a high??tech industrial park in BDA in recent years, summarized that the new features of a modern high-tech industrial park planning, and is explored the developing trend of its planning and design, combined with the recent corresponding park planning and construction of related projects, the above aspects are also summatrized.
2009, 39(3): 4-8.
doi: 10.13204/j.gyjz200903002
Abstract:
A suitable planning for an enterprise industrial park is important, which may influence the products and future development of the enlerprise. By studying some design projects of industrial park, it is summarised that four design principles, including to follow the technic flow for production, clear zoning for manufacture function, the shortcut principle and sustainable development.
A suitable planning for an enterprise industrial park is important, which may influence the products and future development of the enlerprise. By studying some design projects of industrial park, it is summarised that four design principles, including to follow the technic flow for production, clear zoning for manufacture function, the shortcut principle and sustainable development.
2009, 39(3): 9-10,68.
doi: 10.13204/j.gyjz200903003
Abstract:
Suzhou Industrial Park is called ?? the industrial park, but it doesn't look like a usual industrial park. When entering the park, people sincerely issue the feeling of not being the garden landscape, yet better than it emotion. Every corner is filled with green grass and trees. Each sculpture is fine and meaningful, with inside story transmitted. Each building is set off by willow tree, lotus pond, cassia tree or maple wood. If the ancient City of Suzhou is known as the garden in a city, then the park with strong characteristics of garden landscape is certainly a city in the garden.
Suzhou Industrial Park is called ?? the industrial park, but it doesn't look like a usual industrial park. When entering the park, people sincerely issue the feeling of not being the garden landscape, yet better than it emotion. Every corner is filled with green grass and trees. Each sculpture is fine and meaningful, with inside story transmitted. Each building is set off by willow tree, lotus pond, cassia tree or maple wood. If the ancient City of Suzhou is known as the garden in a city, then the park with strong characteristics of garden landscape is certainly a city in the garden.
2009, 39(3): 11-14,89.
doi: 10.13204/j.gyjz200903004
Abstract:
Facing the tremendous pressure of resources and environment, only by insisting on people-oriented and following the way of industrial development in the tape of resources conservation and environment-friendly in creation of the Chinese industrial buildings, can the sustainable development be realized in the Chinese economy and society.
Facing the tremendous pressure of resources and environment, only by insisting on people-oriented and following the way of industrial development in the tape of resources conservation and environment-friendly in creation of the Chinese industrial buildings, can the sustainable development be realized in the Chinese economy and society.
2009, 39(3): 15-17.
doi: 10.13204/j.gyjz200903005
Abstract:
The monumentality is the permanent aim of the architectural art. Through the studying of the monumentality of the industrial architecture, it is attempted to clarify that only the monumentality based on the history and the culture makes sense.
The monumentality is the permanent aim of the architectural art. Through the studying of the monumentality of the industrial architecture, it is attempted to clarify that only the monumentality based on the history and the culture makes sense.
2009, 39(3): 18-20.
doi: 10.13204/j.gyjz200903006
Abstract:
In a new ear, in addition to taking account of the functional practicality in the design of industrial architectures, these architectures should also be endowed with regional, cultural and epochal characters using a design conception different from the one in the past. Hence architects can accomplish great things in the design field of industrial architectures.
In a new ear, in addition to taking account of the functional practicality in the design of industrial architectures, these architectures should also be endowed with regional, cultural and epochal characters using a design conception different from the one in the past. Hence architects can accomplish great things in the design field of industrial architectures.
2009, 39(3): 21-22.
doi: 10.13204/j.gyjz200903007
Abstract:
Industrial revolution bred the original industrial buildings, then industrial buildings the progress in industry and the development of the great modern architecture, in which concern and improrement were gradually given to humensism, yet attention was not paid to the humanisation of indusstrial architecturses. Not only workers need the humanisation but also the enterprise needs it for the reputation. The humanisation of industrial buildings can be moulded from the aspects as layout of function and traffic, ouvside entironment, inside space and the construction of entity.
Industrial revolution bred the original industrial buildings, then industrial buildings the progress in industry and the development of the great modern architecture, in which concern and improrement were gradually given to humensism, yet attention was not paid to the humanisation of indusstrial architecturses. Not only workers need the humanisation but also the enterprise needs it for the reputation. The humanisation of industrial buildings can be moulded from the aspects as layout of function and traffic, ouvside entironment, inside space and the construction of entity.
2009, 39(3): 23-25.
doi: 10.13204/j.gyjz200903008
Abstract:
It was studied particularly the inner public space of an office building, which was used for the sharing and communication. Firstly, it was expounded the importence of the inner public space. Secondly, analysed the design technique of archi structure, based on the character and conformation of the inner space, combining with the design scheme of relevant projects. Finally, it was also summed up the trend of its development, which provided a theoretic reference for the design of similar projects.
It was studied particularly the inner public space of an office building, which was used for the sharing and communication. Firstly, it was expounded the importence of the inner public space. Secondly, analysed the design technique of archi structure, based on the character and conformation of the inner space, combining with the design scheme of relevant projects. Finally, it was also summed up the trend of its development, which provided a theoretic reference for the design of similar projects.
2009, 39(3): 26-28.
doi: 10.13204/j.gyjz200903009
Abstract:
Aucording to the current conditions of the industrial architectures of old industrial bases in the northeast of China, the strategies of renovation are put forward: building the large indoor public space, the renovation strategies of the industrial architecture in old industrial bases are expounded from such aspects as superiority, functional use and principle of renovation.
Aucording to the current conditions of the industrial architectures of old industrial bases in the northeast of China, the strategies of renovation are put forward: building the large indoor public space, the renovation strategies of the industrial architecture in old industrial bases are expounded from such aspects as superiority, functional use and principle of renovation.
2009, 39(3): 29-31.
doi: 10.13204/j.gyjz200903010
Abstract:
In order to form a reformed space for the old industrial factory building better, and through the application in the space design of this artistic conceptleave blank, it is proposed that it should be kept the space information of bearing the weight of historical cultural issues and set off old information through constructing new building. And then the abundant space expression can be bormed. Sustainable development of the space has been formed by the leaving blank in the space reform of the industrial building.
In order to form a reformed space for the old industrial factory building better, and through the application in the space design of this artistic conceptleave blank, it is proposed that it should be kept the space information of bearing the weight of historical cultural issues and set off old information through constructing new building. And then the abundant space expression can be bormed. Sustainable development of the space has been formed by the leaving blank in the space reform of the industrial building.
2009, 39(3): 32-35.
doi: 10.13204/j.gyjz200903011
Abstract:
Based on the test data, the function of stirrup in SRC joints and the feasibility of SRC joints without stirrup are discussed, also the hysteretic behavior and capacity of bearing loads of non-stirrup SRC joints with thickened web are analyzed. It is indicated that SRC joints with thickened web and drawing steel set on longitudinal bar of columns can be satisfied with the requirement of deformation capacity and ductility of specimens, and the stirrup in SRC joints has not to be set, which is inconvenient. The utilization ratio of thickened web is put forward, also the formula of bearing capacity and reinforced measure are given.
Based on the test data, the function of stirrup in SRC joints and the feasibility of SRC joints without stirrup are discussed, also the hysteretic behavior and capacity of bearing loads of non-stirrup SRC joints with thickened web are analyzed. It is indicated that SRC joints with thickened web and drawing steel set on longitudinal bar of columns can be satisfied with the requirement of deformation capacity and ductility of specimens, and the stirrup in SRC joints has not to be set, which is inconvenient. The utilization ratio of thickened web is put forward, also the formula of bearing capacity and reinforced measure are given.
2009, 39(3): 36-38.
doi: 10.13204/j.gyjz200903012
Abstract:
Based on the viscoelastic stochastic FEM, using FEM in space and scatter method in time, it was set up the plane finite element model of response analysis of concrete frame structures, in which a linear three-parameter viscoelastic model was adopted .The program of finite element was developed and used in analyzing the response of concrete frame structures and the creep law of concrete .The numerical results indicate that this method has high precision and efficiency, which is applicable to operation of engineering.
Based on the viscoelastic stochastic FEM, using FEM in space and scatter method in time, it was set up the plane finite element model of response analysis of concrete frame structures, in which a linear three-parameter viscoelastic model was adopted .The program of finite element was developed and used in analyzing the response of concrete frame structures and the creep law of concrete .The numerical results indicate that this method has high precision and efficiency, which is applicable to operation of engineering.
2009, 39(3): 39-42.
doi: 10.13204/j.gyjz200903013
Abstract:
Air-cooled condenser structure system has a wind-bread wall above platform. Whose behavior belongs to an enclosure the of structure, and can vibrate with the wind together with structure. It is different from the enclosures specified by codes, therefore, the gust factor in the code can not be used directly. Through 1/150 three-span model wind tunnel test, taking account of wind angle, the surrounding buildings, whether the fan rotats, it is obtained the gust factor of wind-break wall of three-span air-cooled condenser structure system under different conditions. These parameters not only provide a basis for wind-resistant design, but also provide the basic research data for formulating the professional regulations of our country.
Air-cooled condenser structure system has a wind-bread wall above platform. Whose behavior belongs to an enclosure the of structure, and can vibrate with the wind together with structure. It is different from the enclosures specified by codes, therefore, the gust factor in the code can not be used directly. Through 1/150 three-span model wind tunnel test, taking account of wind angle, the surrounding buildings, whether the fan rotats, it is obtained the gust factor of wind-break wall of three-span air-cooled condenser structure system under different conditions. These parameters not only provide a basis for wind-resistant design, but also provide the basic research data for formulating the professional regulations of our country.
2009, 39(3): 43-47.
doi: 10.13204/j.gyjz200903014
Abstract:
Under the support structure system of air cooled condenser there are large-diameter group columns, the proposed wind parameters in present load code can't be used directly in the wind resistance design of this kind of structure. A rigid model with 1:150 scaling factor was made, and wind tunnel test was carried out to study the wind pressure distribution on the large-diameter columns. In order to obtain the body coefficient of the large-diameter column, FLUENT 6.1 software was used to simulate the wind field of the structure. Wind tunnel test for wind pressure distribution on pipe column surface and test data processing were presented in detail. The feasibility of CFD numerical simulation in wind resistance design of structure was verified by comparing the results of wind tunnel test with those of the simulation.
Under the support structure system of air cooled condenser there are large-diameter group columns, the proposed wind parameters in present load code can't be used directly in the wind resistance design of this kind of structure. A rigid model with 1:150 scaling factor was made, and wind tunnel test was carried out to study the wind pressure distribution on the large-diameter columns. In order to obtain the body coefficient of the large-diameter column, FLUENT 6.1 software was used to simulate the wind field of the structure. Wind tunnel test for wind pressure distribution on pipe column surface and test data processing were presented in detail. The feasibility of CFD numerical simulation in wind resistance design of structure was verified by comparing the results of wind tunnel test with those of the simulation.
2009, 39(3): 48-51.
doi: 10.13204/j.gyjz200903015
Abstract:
In order to study the shear performance of steel reinforced lightweight aggregate concrete beams, fifteen steel reinforced lightweight aggregate concrete beams and two steel reinforced normal density concrete beams were tested. The results of test have indicated that the occurrence of shear adhesive failure could be avoided if reinforced certain stirrups in section steel concrete beams. Among seventeen testing beams, 7 were slanting pressure failure, and the other 10 were shear pressure failure. This test, as well as the test of Ref. [1], has showed that the ratio of shear to span had decisive influence on the failure mode of testing beams. When the ratio of shear to span satisfied 1.5, slanting pressure failure happened; when 1.53.0, shear pressure failure happened; and when 3.0, flexural failure happened. At the same time, the existence of section steel made the brittle performance of shear failure improve remarkably.
In order to study the shear performance of steel reinforced lightweight aggregate concrete beams, fifteen steel reinforced lightweight aggregate concrete beams and two steel reinforced normal density concrete beams were tested. The results of test have indicated that the occurrence of shear adhesive failure could be avoided if reinforced certain stirrups in section steel concrete beams. Among seventeen testing beams, 7 were slanting pressure failure, and the other 10 were shear pressure failure. This test, as well as the test of Ref. [1], has showed that the ratio of shear to span had decisive influence on the failure mode of testing beams. When the ratio of shear to span satisfied 1.5, slanting pressure failure happened; when 1.53.0, shear pressure failure happened; and when 3.0, flexural failure happened. At the same time, the existence of section steel made the brittle performance of shear failure improve remarkably.
2009, 39(3): 52-55.
doi: 10.13204/j.gyjz200903016
Abstract:
Seven concrete beams with fine grain HRBF500 bars are designed and tested. By changing the thickness of protective-covering, longitudinal reinforcement ratio and the concrete strength, etc, the bearing capacity of the concrete beams is analyzed. The result shows that the measured values of the capacities of the beams with HRBF 500 bars are close to those by code formulas, so the current formulas in the code can still be used.
Seven concrete beams with fine grain HRBF500 bars are designed and tested. By changing the thickness of protective-covering, longitudinal reinforcement ratio and the concrete strength, etc, the bearing capacity of the concrete beams is analyzed. The result shows that the measured values of the capacities of the beams with HRBF 500 bars are close to those by code formulas, so the current formulas in the code can still be used.
2009, 39(3): 56-59.
doi: 10.13204/j.gyjz200903017
Abstract:
In order to study the shear performance of steel reinforced lightweight aggregate concrete beams, fifteen steel reinforced lightweight aggregate concrete beams and two steel reinforced normal density concrete beams were tested. The results of test have indicated that the occurrence of shear adhesive failure could be avoided if reinforced certain stirrups in section steel concrete beams. Among seventeen testing beams, 7 were slanting pressure failure, and the other 10 were shear pressure failure. This test, as well as the test of Ref. [1], has showed that the ratio of shear to span had decisive influence on the failure mode of testing beams. When the ratio of shear to span satisfied 1.5, slanting pressure failure happened; when 1.53.0, shear pressure failure happened; and when 3.0, flexural failure happened. At the same time, the existence of section steel made the brittle performance of shear failure improve remarkably.
In order to study the shear performance of steel reinforced lightweight aggregate concrete beams, fifteen steel reinforced lightweight aggregate concrete beams and two steel reinforced normal density concrete beams were tested. The results of test have indicated that the occurrence of shear adhesive failure could be avoided if reinforced certain stirrups in section steel concrete beams. Among seventeen testing beams, 7 were slanting pressure failure, and the other 10 were shear pressure failure. This test, as well as the test of Ref. [1], has showed that the ratio of shear to span had decisive influence on the failure mode of testing beams. When the ratio of shear to span satisfied 1.5, slanting pressure failure happened; when 1.53.0, shear pressure failure happened; and when 3.0, flexural failure happened. At the same time, the existence of section steel made the brittle performance of shear failure improve remarkably.
2009, 39(3): 60-63,38.
doi: 10.13204/j.gyjz200903018
Abstract:
The microbiology is introduced in foundation treatment.Several carbonate-mineralization microbes and polysaccharides viscose microbes are screened and isolated, and microbes ATCC6453 , No.3 and No.5 are used in silt modification.Engineering properties of silt before and after modification are compared by unconfined compressive strength test and indoor seepage test.The microstructures of silt incorporating different microbes are analysed by mean of scanning electron microscope, the modification mechanism of silt is revealed. These studies indicate that certain engineering properties of silt can be improved by incorporating microbes.
The microbiology is introduced in foundation treatment.Several carbonate-mineralization microbes and polysaccharides viscose microbes are screened and isolated, and microbes ATCC6453 , No.3 and No.5 are used in silt modification.Engineering properties of silt before and after modification are compared by unconfined compressive strength test and indoor seepage test.The microstructures of silt incorporating different microbes are analysed by mean of scanning electron microscope, the modification mechanism of silt is revealed. These studies indicate that certain engineering properties of silt can be improved by incorporating microbes.
2009, 39(3): 64-68.
doi: 10.13204/j.gyjz200903019
Abstract:
Compared with others, the soft soil in Lianyungang contains high salinity, and the most ions are Cl-, SO42-and Mg2+. If the cement deep mixing method is to improve the soft soil foundation, these ions will generate the bad influence on the strength of pile. By using cube compressive strength test and SEM, the inherent reason of the bad influence can be explored. The results indicate that Mg2+, Cl-and SO42- ions are disadvantage elements. In the three ions, C- influences the strength of the three curing ages; Mg2+ effects the 28 d strength and SO42- impacts the long term strength.
Compared with others, the soft soil in Lianyungang contains high salinity, and the most ions are Cl-, SO42-and Mg2+. If the cement deep mixing method is to improve the soft soil foundation, these ions will generate the bad influence on the strength of pile. By using cube compressive strength test and SEM, the inherent reason of the bad influence can be explored. The results indicate that Mg2+, Cl-and SO42- ions are disadvantage elements. In the three ions, C- influences the strength of the three curing ages; Mg2+ effects the 28 d strength and SO42- impacts the long term strength.
2009, 39(3): 69-72.
doi: 10.13204/j.gyjz200903020
Abstract:
It is introduced that the contrast satic load test of PC pipe pile with tooth pitch with the one of regular smooth surface pipe pile on two sites in Kunming, as well as the unique technical capability of a multi-usage drainage pipe pilewith tooth pitch is introduced. It is suggested that the introduction should propel the new construction technology which can make full use of the earth frictional resistance, effectively improve load-bearing capacity and save investment,material and energy.
It is introduced that the contrast satic load test of PC pipe pile with tooth pitch with the one of regular smooth surface pipe pile on two sites in Kunming, as well as the unique technical capability of a multi-usage drainage pipe pilewith tooth pitch is introduced. It is suggested that the introduction should propel the new construction technology which can make full use of the earth frictional resistance, effectively improve load-bearing capacity and save investment,material and energy.
2009, 39(3): 73-76,122.
doi: 10.13204/j.gyjz200903021
Abstract:
Soft ground zone distribute extensively in China, due to being limited by the conditions, a large number of highways must be constructed on the soft ground. Because of the negative characters of the soft soil, such as rich watercontent, high compressibility, low bearing capacity etc, biggish influence and hidden dangers are brought to the highway construction. Combining with the soft soil treating method of the trial pavement section, according to the monitoring data, settlement values calculated by hierarchical method is compared with the actual measurement settlement. The foundation settlement is analyzed by finite element analysis, and the engineering practicality of various methods are also compared. Finally, the auxiliary value of settlement suiting to the characteristics of region is brought forward.
Soft ground zone distribute extensively in China, due to being limited by the conditions, a large number of highways must be constructed on the soft ground. Because of the negative characters of the soft soil, such as rich watercontent, high compressibility, low bearing capacity etc, biggish influence and hidden dangers are brought to the highway construction. Combining with the soft soil treating method of the trial pavement section, according to the monitoring data, settlement values calculated by hierarchical method is compared with the actual measurement settlement. The foundation settlement is analyzed by finite element analysis, and the engineering practicality of various methods are also compared. Finally, the auxiliary value of settlement suiting to the characteristics of region is brought forward.
2009, 39(3): 77-80.
doi: 10.13204/j.gyjz200903022
Abstract:
The chloride ions'concentrations in ex isting concrete in tidal estuary environment of the Qiantang River are measured, the relation between erosion depths and concentrations of chloride ions in concrete is analyzed. Based on the samples, the porosities of existing concrete are measured, and the relations between control starting points and porosities is also studied. In addition, there is stronger randomness in distribution of chloride ions'concentration at the different depths of existing concrete.
The chloride ions'concentrations in ex isting concrete in tidal estuary environment of the Qiantang River are measured, the relation between erosion depths and concentrations of chloride ions in concrete is analyzed. Based on the samples, the porosities of existing concrete are measured, and the relations between control starting points and porosities is also studied. In addition, there is stronger randomness in distribution of chloride ions'concentration at the different depths of existing concrete.
2009, 39(3): 81-85.
doi: 10.13204/j.gyjz200903023
Abstract:
It is carried out a quality assessment on lightweight aggregate of the stacked self combustion coal gangue in GaodeMine of Fuxin in Liaoning according to the national standards. On the basis of satisfying the demands of national criterion of lightweight aggregate through all kinds of indexes, taking the crushed self combustion coal gangue as coarse aggregate, polypropylene fiber as reinforced materials, ten sets of self combustion coal gangue concrete specimens are designed by uniform test, and lots of tests of compressive strength, splitting strength and flexural strength are also carried out. The research results show that because self combustion coal gangue coarse aggregate in Gaode Mine of Fux in matches with the strength and Yang's modulus of a matrix, and itself strength is less than natural macadam, but it sufficiently displays coordination effect between aggregate and matrix, which can produce C40 concrete with excellent property whose early stage strength develops more perfectly.
It is carried out a quality assessment on lightweight aggregate of the stacked self combustion coal gangue in GaodeMine of Fuxin in Liaoning according to the national standards. On the basis of satisfying the demands of national criterion of lightweight aggregate through all kinds of indexes, taking the crushed self combustion coal gangue as coarse aggregate, polypropylene fiber as reinforced materials, ten sets of self combustion coal gangue concrete specimens are designed by uniform test, and lots of tests of compressive strength, splitting strength and flexural strength are also carried out. The research results show that because self combustion coal gangue coarse aggregate in Gaode Mine of Fux in matches with the strength and Yang's modulus of a matrix, and itself strength is less than natural macadam, but it sufficiently displays coordination effect between aggregate and matrix, which can produce C40 concrete with excellent property whose early stage strength develops more perfectly.
2009, 39(3): 86-89.
doi: 10.13204/j.gyjz200903024
Abstract:
Pumice lightweight aggregate concrete (LWAC) of LC30, LC35 is prepared with the method of mixing polypropylene fiber, superplasticizer, air?? entraining agent and mineral admixtures. Comparing frost resistance durability of LWAC in salt solution ( 5% Na2SO4) and in water, the degree of LWAC durability deterioration is: freezing??thawing in salt solution freezing??thawing in water. The frost resistance of LWAC is improved by mixing polypropylene fiber. The large volume fraction has tendency of good frost resistance of LWAC. SEM shows that hydrate structure in interfacial transition zone (ITZ) becomes loose gradually with an increase in cycles of freezing thawing and corrosion. Polypropylene fiber has stronger cementing bond with paste and can restraint the damage to concrete by freezing??thawing.
Pumice lightweight aggregate concrete (LWAC) of LC30, LC35 is prepared with the method of mixing polypropylene fiber, superplasticizer, air?? entraining agent and mineral admixtures. Comparing frost resistance durability of LWAC in salt solution ( 5% Na2SO4) and in water, the degree of LWAC durability deterioration is: freezing??thawing in salt solution freezing??thawing in water. The frost resistance of LWAC is improved by mixing polypropylene fiber. The large volume fraction has tendency of good frost resistance of LWAC. SEM shows that hydrate structure in interfacial transition zone (ITZ) becomes loose gradually with an increase in cycles of freezing thawing and corrosion. Polypropylene fiber has stronger cementing bond with paste and can restraint the damage to concrete by freezing??thawing.
2009, 39(3): 90-95.
doi: 10.13204/j.gyjz200903025
Abstract:
A programmable process machine with integrated positive-negative arcs, profiled and bent arc is developed, which takes the lead in the world in order to meet the needs of T2 terminal building for Pudong Airport in Shanghai. This machine can produce 110m-long profiled sheet with hidden negative-positive-negative arcs.
A programmable process machine with integrated positive-negative arcs, profiled and bent arc is developed, which takes the lead in the world in order to meet the needs of T2 terminal building for Pudong Airport in Shanghai. This machine can produce 110m-long profiled sheet with hidden negative-positive-negative arcs.
2009, 39(3): 96-102.
doi: 10.13204/j.gyjz200903026
Abstract:
The structural health monitoring (SHM) with the characteristic of multidisciplinary is a powerful tool to support the operational safety and appropriate maintenance for civil engineering infrastructures. The recent advances in research on varieties of damage detection methods and wireless smart sensing technology are stated. The focuses of the online SHM are discussed and the potential challenges in the future to SHM and damage detection are addressed.
The structural health monitoring (SHM) with the characteristic of multidisciplinary is a powerful tool to support the operational safety and appropriate maintenance for civil engineering infrastructures. The recent advances in research on varieties of damage detection methods and wireless smart sensing technology are stated. The focuses of the online SHM are discussed and the potential challenges in the future to SHM and damage detection are addressed.
2009, 39(3): 103-106.
doi: 10.13204/j.gyjz200903027
Abstract:
With the application of lightweight enclosure materials in the steel structure workshops, the solid??web type portal frame is used in metallurgical workshop, instead of the traditional latticed structure, but the current design method only bases on the code for design of steel structure and the experience. In order to control the steel consumption and ensure the safety, an optimal design method for the portal frame of ordinary steel structure workshop is proposed, according to the contrastive analysis on current related codes and the engineering experience. One project case shows the advantages of this method, and this method provides a basis for the project design of the same type.
With the application of lightweight enclosure materials in the steel structure workshops, the solid??web type portal frame is used in metallurgical workshop, instead of the traditional latticed structure, but the current design method only bases on the code for design of steel structure and the experience. In order to control the steel consumption and ensure the safety, an optimal design method for the portal frame of ordinary steel structure workshop is proposed, according to the contrastive analysis on current related codes and the engineering experience. One project case shows the advantages of this method, and this method provides a basis for the project design of the same type.
2009, 39(3): 107-111.
doi: 10.13204/j.gyjz200903028
Abstract:
The numerical simulation and analysis of shear resistance behavior of two-side connected steel-plate shear wall (SPSW) was carried out by the finite element software ANSYS. In order to investigate the behavior of two-side connected SPSW, a simplified analysis model is brought forward and verified by analyzing the stress characters of a single-span multi-level model under monotonic loads. The forced mechanism and failure mode are investigated. The mechanical behavior of the beams is also discussed in details. It is found that depth-thickness ratio Kand span-depth ratio are the key parameters which influence the shear resistance behavior of two-side connected SPSW; the transfer mode of the horizontal loads is different between two-side connected SPSW and four-side connected SPSW; two-side connected SPSW has no additional moments in columns, which fit the aseismatic principle of/strong column and weak beam0 better; structural measures of the beam connected with the steel plate is demanded when depth-thickness ratio is big, it will guarantee that the damage on the beam occurs latter than the steel plate.
The numerical simulation and analysis of shear resistance behavior of two-side connected steel-plate shear wall (SPSW) was carried out by the finite element software ANSYS. In order to investigate the behavior of two-side connected SPSW, a simplified analysis model is brought forward and verified by analyzing the stress characters of a single-span multi-level model under monotonic loads. The forced mechanism and failure mode are investigated. The mechanical behavior of the beams is also discussed in details. It is found that depth-thickness ratio Kand span-depth ratio are the key parameters which influence the shear resistance behavior of two-side connected SPSW; the transfer mode of the horizontal loads is different between two-side connected SPSW and four-side connected SPSW; two-side connected SPSW has no additional moments in columns, which fit the aseismatic principle of/strong column and weak beam0 better; structural measures of the beam connected with the steel plate is demanded when depth-thickness ratio is big, it will guarantee that the damage on the beam occurs latter than the steel plate.
2009, 39(3): 112-115,85.
doi: 10.13204/j.gyjz200903029
Abstract:
nonlinear finite element analysis of the steel frame with top- seat angle and double web-angles semi-rigid connection is carried out with ANSYS finite element software. In the procedure of the finite element analysis, connective, geometrical and material nonlinearities are considered. The analytic results are compared with experimental results, and the influence of semi-rigid connection's flexibility on steel frame is also explored, which provides some references for the design of steel frame with semi-rigid connection in the future.
nonlinear finite element analysis of the steel frame with top- seat angle and double web-angles semi-rigid connection is carried out with ANSYS finite element software. In the procedure of the finite element analysis, connective, geometrical and material nonlinearities are considered. The analytic results are compared with experimental results, and the influence of semi-rigid connection's flexibility on steel frame is also explored, which provides some references for the design of steel frame with semi-rigid connection in the future.
2009, 39(3): 116-118,35.
doi: 10.13204/j.gyjz200903030
Abstract:
The main parameters varied in the study are the slenderness ratio and eccentricity of load.Four concrete-filled double skin steel tubular(CFDSST) columns under eccentric loads and two columns under axial compression are studied. Based on the analysis of the experimental phenomenon in detail, some mechanic characteristics are put forward. Through the comparison with other two kinds of CFDSST (one with circular section, and the other with square section), the bearing capacity of the members is larger than that of the former and lesser than that of the latter. Finally, a simplified formula is proposed in the paper, and the calculated results are in good agreement with the test results or the mathematic results. The results are valuable for engineering designers
The main parameters varied in the study are the slenderness ratio and eccentricity of load.Four concrete-filled double skin steel tubular(CFDSST) columns under eccentric loads and two columns under axial compression are studied. Based on the analysis of the experimental phenomenon in detail, some mechanic characteristics are put forward. Through the comparison with other two kinds of CFDSST (one with circular section, and the other with square section), the bearing capacity of the members is larger than that of the former and lesser than that of the latter. Finally, a simplified formula is proposed in the paper, and the calculated results are in good agreement with the test results or the mathematic results. The results are valuable for engineering designers
2009, 39(3): 119-122.
doi: 10.13204/j.gyjz200903031
Abstract:
It is introduced a method of using grout to replace low strength concrete of partial section of frame beams-column and strengthening beam-column joints of frame structure with carbon fiber. Plan and technical measures of transfering load together by changing existing frame structure to masonry structure and welding steel skeleton of frame column into lattice column, cause replacing method successfully applied. This is a typical case of achieving the design by construction technology.
It is introduced a method of using grout to replace low strength concrete of partial section of frame beams-column and strengthening beam-column joints of frame structure with carbon fiber. Plan and technical measures of transfering load together by changing existing frame structure to masonry structure and welding steel skeleton of frame column into lattice column, cause replacing method successfully applied. This is a typical case of achieving the design by construction technology.
2009, 39(3): 123-125.
doi: 10.13204/j.gyjz200903032
Abstract:
Water efficiency is one of the important criteria in green building initiative. In rural area where sewer lines have not yet reached, the innovative design of on??site stormwater management systems becomes a critical component for green building accreditation. The paper preview the development of stormwater management in green building rating system, introduced the low impact development (LID) content and key technologies, and discussed the feasibility of applying the LID in green building. Several case studies were investigated to illustrate the LID technology using in green building. The results showed that some of these on??site LID practices can reduce runoff annual volumes, and others can remove nutrients in stormwater. So, it is important to integrate the on??site characteristics with landscape planning, design, water recycle, and other infrastructures in green building.
Water efficiency is one of the important criteria in green building initiative. In rural area where sewer lines have not yet reached, the innovative design of on??site stormwater management systems becomes a critical component for green building accreditation. The paper preview the development of stormwater management in green building rating system, introduced the low impact development (LID) content and key technologies, and discussed the feasibility of applying the LID in green building. Several case studies were investigated to illustrate the LID technology using in green building. The results showed that some of these on??site LID practices can reduce runoff annual volumes, and others can remove nutrients in stormwater. So, it is important to integrate the on??site characteristics with landscape planning, design, water recycle, and other infrastructures in green building.
