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2004 Vol. 34, No. 3
Display Method:
2004, 34(3): 1-4,8.
doi: 10.13204/j.gyjz200403001
Abstract:
An extruded pile of nonuniform diameter-DX multi-section-extruding pile and DX extruding device are described in this paper.The technical characteristics of the DX extruding device and the YZJ extruding device are in detail compared. Finally the characteristics of DX pile are also introduced.
An extruded pile of nonuniform diameter-DX multi-section-extruding pile and DX extruding device are described in this paper.The technical characteristics of the DX extruding device and the YZJ extruding device are in detail compared. Finally the characteristics of DX pile are also introduced.
2004, 34(3): 5-8.
doi: 10.13204/j.gyjz200403002
Abstract:
The mechanism of bearing capacity of DX piles are studied by a series of loading tests of full-sacle model DX Piles cast-in-situ. In the paper, bearing capacity comparisons between column piles and DX piles are made, and the load transmission mode of DX pile are studied, which provided the theoretical references for the bearing capacity design of the DX piles in the engineering practice.
The mechanism of bearing capacity of DX piles are studied by a series of loading tests of full-sacle model DX Piles cast-in-situ. In the paper, bearing capacity comparisons between column piles and DX piles are made, and the load transmission mode of DX pile are studied, which provided the theoretical references for the bearing capacity design of the DX piles in the engineering practice.
2004, 34(3): 9-14,29.
doi: 10.13204/j.gyjz200403003
Abstract:
Through static loading tests of full-scale model DX piles cast-in-situ, the distribution and development of the frictional resistance and the end bearing of DX piles are studied.The properties of the ratio of the frictional resistance and the end bearing to the pile head load are also discussed.
Through static loading tests of full-scale model DX piles cast-in-situ, the distribution and development of the frictional resistance and the end bearing of DX piles are studied.The properties of the ratio of the frictional resistance and the end bearing to the pile head load are also discussed.
2004, 34(3): 15-18,39.
doi: 10.13204/j.gyjz200403004
Abstract:
Full-scale model tests for DX piles cast in-situ were conducted. In this paper, the exertion of the unit shaft resistance and unit end resistance of DX piles are discussed, and the results are compared to those of column piles.
Full-scale model tests for DX piles cast in-situ were conducted. In this paper, the exertion of the unit shaft resistance and unit end resistance of DX piles are discussed, and the results are compared to those of column piles.
2004, 34(3): 19-20,43.
doi: 10.13204/j.gyjz200403005
Abstract:
The integrity test of three large-scale model DX piles by reflected wave method using the PTA dynamic inspection system is introduced.
The integrity test of three large-scale model DX piles by reflected wave method using the PTA dynamic inspection system is introduced.
2004, 34(3): 21-23.
doi: 10.13204/j.gyjz200403006
Abstract:
The law of load transfer and deformation characteristics of single pile of cast-in-place piles with branches and plates are expounded through the analysis of these piles field static loading test results.
The law of load transfer and deformation characteristics of single pile of cast-in-place piles with branches and plates are expounded through the analysis of these piles field static loading test results.
2004, 34(3): 24-26,67.
doi: 10.13204/j.gyjz200403007
Abstract:
An extruding pile with branches and plates is the one deriving from the ordinary cast-in-situ concrete piles, by which the bearing capacity of a single pile can be raised substantially with a remarkable economic benefit. A new empirical formula is proposed for vertical ultimate bearing capacity of the extruding pile with branches and plates by analysing a lot of test pile data of the extruding piles with branches and plates, whose applicability is also verified.
An extruding pile with branches and plates is the one deriving from the ordinary cast-in-situ concrete piles, by which the bearing capacity of a single pile can be raised substantially with a remarkable economic benefit. A new empirical formula is proposed for vertical ultimate bearing capacity of the extruding pile with branches and plates by analysing a lot of test pile data of the extruding piles with branches and plates, whose applicability is also verified.
HUMANIZATION OF HOSPITAL SPACE ENVIRONMENT——ARTISTIC AND COURTY DESIGN OF HOSPITAL SPACE ENVIRONMENT
2004, 34(3): 27-29.
doi: 10.13204/j.gyjz200403008
Abstract:
Art and courtyard are two aspects of the humanization of a hospital space environment. This article separately discusses the design of artistic hospital space environment and its importance according to the closed architectural style and various artistic decorations; and demonstrates how to create the hospital space environment by offering dfferent kinds of structures of yards.
Art and courtyard are two aspects of the humanization of a hospital space environment. This article separately discusses the design of artistic hospital space environment and its importance according to the closed architectural style and various artistic decorations; and demonstrates how to create the hospital space environment by offering dfferent kinds of structures of yards.
2004, 34(3): 30-32.
doi: 10.13204/j.gyjz200403009
Abstract:
The tempo of Chinese urbanization are speeding up now. This article introduces a method of environment assessmentlife cycle assessment(LCA). It also proposes some measures to assess the acological and humanization environment influence throughout a project.
The tempo of Chinese urbanization are speeding up now. This article introduces a method of environment assessmentlife cycle assessment(LCA). It also proposes some measures to assess the acological and humanization environment influence throughout a project.
2004, 34(3): 33-35,70.
doi: 10.13204/j.gyjz200403010
Abstract:
In the increasing urbanization of China, urban green and urban renewal are like a raging fire. This paper discusses the contributions of border tree, sound barrier and greenbelt to noise reduction, environmental psychology and environmental esthetics. It is emphasised that planting trees is better than planting grass only in a certain situation and criticize the thought of fashion lawn.
In the increasing urbanization of China, urban green and urban renewal are like a raging fire. This paper discusses the contributions of border tree, sound barrier and greenbelt to noise reduction, environmental psychology and environmental esthetics. It is emphasised that planting trees is better than planting grass only in a certain situation and criticize the thought of fashion lawn.
2004, 34(3): 36-39.
doi: 10.13204/j.gyjz200403011
Abstract:
A new structure of multi-rib slab lightweight frame is introduced. A computational model with 3-D beam and plate element is set up according to the system model. Correlation between experimental and FEA model results is studied in the light of the test results from vibration tables, and an example is given.
A new structure of multi-rib slab lightweight frame is introduced. A computational model with 3-D beam and plate element is set up according to the system model. Correlation between experimental and FEA model results is studied in the light of the test results from vibration tables, and an example is given.
2004, 34(3): 40-43.
doi: 10.13204/j.gyjz200403012
Abstract:
In order to satisfy the requirement of the plane multi member joints testing the multi-functional experimental facility has been developed. It is made of load-ring、steel tension-bar and jack. The biggest load of the experimental facility can be up to 4?000kN, and the specimen length in the experimental facility can be up to 3 5m. Besides above, the reliability and availability of this facility are proved by the inspection test and large scale steel tube joint tests.
In order to satisfy the requirement of the plane multi member joints testing the multi-functional experimental facility has been developed. It is made of load-ring、steel tension-bar and jack. The biggest load of the experimental facility can be up to 4?000kN, and the specimen length in the experimental facility can be up to 3 5m. Besides above, the reliability and availability of this facility are proved by the inspection test and large scale steel tube joint tests.
2004, 34(3): 44-45.
doi: 10.13204/j.gyjz200403013
Abstract:
Three schemes of structure designing are applied to a building made of concrete small hollow blocks in a real project, and the whole structure is computed. According to comparing and analysing the parameters and results of different schemes, the possibility of applying block masonry to high buildings or the buildings with wide rooms in seismic regions of intensity 8 is discussed, and the details of seismic design are pointed out.
Three schemes of structure designing are applied to a building made of concrete small hollow blocks in a real project, and the whole structure is computed. According to comparing and analysing the parameters and results of different schemes, the possibility of applying block masonry to high buildings or the buildings with wide rooms in seismic regions of intensity 8 is discussed, and the details of seismic design are pointed out.
2004, 34(3): 46-48,53.
doi: 10.13204/j.gyjz200403014
Abstract:
The problems of dynamic stability of different cross-section and material of a column subjected to vertical harmonic load are discussed . The difference between dynamic unstable regions in different cross-section shapes and different materials is studied. Further more the influence of damping force and size-effect of rods on the stability of the column is discussed, and concludes methodology of calculating length of column stability is advanced.
The problems of dynamic stability of different cross-section and material of a column subjected to vertical harmonic load are discussed . The difference between dynamic unstable regions in different cross-section shapes and different materials is studied. Further more the influence of damping force and size-effect of rods on the stability of the column is discussed, and concludes methodology of calculating length of column stability is advanced.
2004, 34(3): 49-51,64.
doi: 10.13204/j.gyjz200403015
Abstract:
The influence of compounding polypropylene fiber and expansion on flexure strength, impermeability and the shrinkage deformation is studied.The experimental results show the comparing with the single effect of either polypropylene fiber or expansive agent, the compounding of them can enhance 28 days flexure strength by 7^5% and 9^9% and reduce the permeability height by 46% and 61% separately and it can also sharply increase the anti-cracking property.The polypropylene fiber can obviously restrict the 7～14 days expansion of expansive concrete.
The influence of compounding polypropylene fiber and expansion on flexure strength, impermeability and the shrinkage deformation is studied.The experimental results show the comparing with the single effect of either polypropylene fiber or expansive agent, the compounding of them can enhance 28 days flexure strength by 7^5% and 9^9% and reduce the permeability height by 46% and 61% separately and it can also sharply increase the anti-cracking property.The polypropylene fiber can obviously restrict the 7～14 days expansion of expansive concrete.
2004, 34(3): 52-53.
doi: 10.13204/j.gyjz200403016
Abstract:
Through treatment of supersonic refining of FA, this paper analyzes the effect of different time and strength of supersonic refining of FAs activation and the law of change in strength of cement speciment with refined FA is also discussed and compared.
Through treatment of supersonic refining of FA, this paper analyzes the effect of different time and strength of supersonic refining of FAs activation and the law of change in strength of cement speciment with refined FA is also discussed and compared.
2004, 34(3): 54-56,73.
doi: 10.13204/j.gyjz200403017
Abstract:
Because of the lack of advanced control methods in rectification projects at present stage, engineers have to pay much attention to the huge number of data which come from the inspection of buildings need to be rectified.Aimed at this problems, a C++ program which can control the procedure of construction automatically is presented, as to deal with the inspection data at any moment and feed back them to instruct the further construction.It contains of four parts:graphic system, data input system, table and graph output system, and automate alarm system.
Because of the lack of advanced control methods in rectification projects at present stage, engineers have to pay much attention to the huge number of data which come from the inspection of buildings need to be rectified.Aimed at this problems, a C++ program which can control the procedure of construction automatically is presented, as to deal with the inspection data at any moment and feed back them to instruct the further construction.It contains of four parts:graphic system, data input system, table and graph output system, and automate alarm system.
2004, 34(3): 57-61,79.
doi: 10.13204/j.gyjz200403018
Abstract:
In this paper, the recent research on collapse mechanism, failure criterion and numerical simulation of RC frames under earthquake force is introduced, and the main problems and the development trend in the present research are also analyzed.
In this paper, the recent research on collapse mechanism, failure criterion and numerical simulation of RC frames under earthquake force is introduced, and the main problems and the development trend in the present research are also analyzed.
2004, 34(3): 62-64.
doi: 10.13204/j.gyjz200403019
Abstract:
According to literatures both at home and abroad, the conductive principle, index of performance and conductive aggregates of a conductive concrete are introduced, the phase distribution of the conductive concrete is analyzed, with an emphasis on the developing trend both at home and abroad.
According to literatures both at home and abroad, the conductive principle, index of performance and conductive aggregates of a conductive concrete are introduced, the phase distribution of the conductive concrete is analyzed, with an emphasis on the developing trend both at home and abroad.
2004, 34(3): 65-67.
doi: 10.13204/j.gyjz200403020
Abstract:
The steel-roof structure of Zhengzhou International Convention and Exhibition Center uses spatially suspended prestress cable-arch system, which satisfies the needs of internal large space, external long overhanging and uniqueness and lightness in architectural shape.This paper approaches the structural property of the structural layout, construction plan and the damage at each stressing stage.It provides the technical data for increasing the structural security, reliability and economy.It also provides profitable references and engineering accumulations for the design of other similar forms of structure.
The steel-roof structure of Zhengzhou International Convention and Exhibition Center uses spatially suspended prestress cable-arch system, which satisfies the needs of internal large space, external long overhanging and uniqueness and lightness in architectural shape.This paper approaches the structural property of the structural layout, construction plan and the damage at each stressing stage.It provides the technical data for increasing the structural security, reliability and economy.It also provides profitable references and engineering accumulations for the design of other similar forms of structure.
2004, 34(3): 68-70.
doi: 10.13204/j.gyjz200403021
Abstract:
Based on prototype tests of flexible flanges for long-span electric transmission tower in Wusongkou, the forced process, failure pattern, load bearing-capacity and deformation etc of flexible flanges are systematically studied, and the influence of thickness of flanges, distance between bolts and edge of flanges, and diameter of bolts on behaviors of flanges and welding seams are also investigated. The studies show that the flexible flanges have good behaviors and their use in Wusongkou tower (500kV) is validated.
Based on prototype tests of flexible flanges for long-span electric transmission tower in Wusongkou, the forced process, failure pattern, load bearing-capacity and deformation etc of flexible flanges are systematically studied, and the influence of thickness of flanges, distance between bolts and edge of flanges, and diameter of bolts on behaviors of flanges and welding seams are also investigated. The studies show that the flexible flanges have good behaviors and their use in Wusongkou tower (500kV) is validated.
2004, 34(3): 71-73.
doi: 10.13204/j.gyjz200403022
Abstract:
In the design of the steel-concrete composite frames, initial rotation stiffness needs to be determined, for elastic analysis and serviceability calculation. In this paper, a calculation method of initial rotation stiffness of semi-rigid steel-concrete composite joints is introduced, whose results are comparied with the test results.
In the design of the steel-concrete composite frames, initial rotation stiffness needs to be determined, for elastic analysis and serviceability calculation. In this paper, a calculation method of initial rotation stiffness of semi-rigid steel-concrete composite joints is introduced, whose results are comparied with the test results.
2004, 34(3): 74-76,82.
doi: 10.13204/j.gyjz200403023
Abstract:
The article points out the conservatism in Technical Specification for Steel Structure of One-story Light-weight Buildings with Portal Frames(CECS 102∶2002), when it is used to design the tapered girder without using the post-buckling strength of web plates. Accurate calculation methods and some suggestions are also given in this paper.
The article points out the conservatism in Technical Specification for Steel Structure of One-story Light-weight Buildings with Portal Frames(CECS 102∶2002), when it is used to design the tapered girder without using the post-buckling strength of web plates. Accurate calculation methods and some suggestions are also given in this paper.
2004, 34(3): 77-79.
doi: 10.13204/j.gyjz200403024
Abstract:
This paper points out the slabs flexure stiffness of a slab-column structure subjected to horizontal forces changes along its span. The flexure stiffness of slab intersected with column is smaller than that of midspan slab. According to the principle which slabs stiffness equals to equivalent beams stiffness, the formula of calculating width for equivalent beam with equal width is given out by using finite element analysis. The calculated result is basically in accordance with that of the test.
This paper points out the slabs flexure stiffness of a slab-column structure subjected to horizontal forces changes along its span. The flexure stiffness of slab intersected with column is smaller than that of midspan slab. According to the principle which slabs stiffness equals to equivalent beams stiffness, the formula of calculating width for equivalent beam with equal width is given out by using finite element analysis. The calculated result is basically in accordance with that of the test.
2004, 34(3): 80-82.
doi: 10.13204/j.gyjz200403025
Abstract:
Based on The Technical Specification for Strengthening Concrete Structures(CECS 25:90), the basic calculating theory of strengthening RC compression member with enlarging cross-section is introduced;design process is coded and software development is also realized using Visual Basic 6^0 software.Stengthening model and calculating method of enlarging cross-section of compression member in SEU-DEEP is further given;finally an example is used to show this course.
Based on The Technical Specification for Strengthening Concrete Structures(CECS 25:90), the basic calculating theory of strengthening RC compression member with enlarging cross-section is introduced;design process is coded and software development is also realized using Visual Basic 6^0 software.Stengthening model and calculating method of enlarging cross-section of compression member in SEU-DEEP is further given;finally an example is used to show this course.
2004, 34(3): 83-84,87.
doi: 10.13204/j.gyjz200403026
Abstract:
Comparing the constructional characteristic of thin-walled steel pipe reinforced by sticking steel plate outside and that of sandwich shell, thin-walled steel pipe reinforced by sticking steel plate outside can be converted to monolayer shell with equivalent stiffness and equivalent thickness based on experimentation.Thus theory of thin shell can be directly used to analyse mechanical behavior of combination structure.The theoretical evaluation results have good agreements with those of the test which may be a reference for engineering applications.
Comparing the constructional characteristic of thin-walled steel pipe reinforced by sticking steel plate outside and that of sandwich shell, thin-walled steel pipe reinforced by sticking steel plate outside can be converted to monolayer shell with equivalent stiffness and equivalent thickness based on experimentation.Thus theory of thin shell can be directly used to analyse mechanical behavior of combination structure.The theoretical evaluation results have good agreements with those of the test which may be a reference for engineering applications.
2004, 34(3): 85-87.
doi: 10.13204/j.gyjz200403027
Abstract:
A detection of inside cracks of bracing beams for an autoclave at a factory is carried out, and the causes of their cracking are analyzed in two aspects.The bracing beams under the working situation are simulated using ANSYS, and the results are in agreement with actuality.At the end, some suggestions are proposed to prevent similar beams from cracking.
A detection of inside cracks of bracing beams for an autoclave at a factory is carried out, and the causes of their cracking are analyzed in two aspects.The bracing beams under the working situation are simulated using ANSYS, and the results are in agreement with actuality.At the end, some suggestions are proposed to prevent similar beams from cracking.
2004, 34(3): 88-90.
doi: 10.13204/j.gyjz200403028
Abstract:
According to the research and practice of the concept consultation master plan of Shanghai Bin Hai International Industrial Zone of Logistics Equipment, the main characteristics of industrial zone of logistics equipment in the new century are foundout and design idea and plan key points are infordued as well.
According to the research and practice of the concept consultation master plan of Shanghai Bin Hai International Industrial Zone of Logistics Equipment, the main characteristics of industrial zone of logistics equipment in the new century are foundout and design idea and plan key points are infordued as well.
