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25 August 1999, Volume 18 Issue 4 Previous Issue    Next Issue

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Analysis of time dependent effects of concrete, geometrical nonlinearities, material nonlinearities of Wanxian Yangtze River bridge GU An-bang, LIU Zhong, ZHOU Shui-xin 1999, 18(4): 1-7.  Abstract ( )   PDF (266KB) ( )   In this paper, time dependent effects of concrete, geometrical nonlinearties, material nonlinearities, method of construction and others of ling span stiffen Framework Reinforced concrete Arch bridge have been analysed. Related Articles | Metrics

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P. F. C large-span combined cable-stayed suspension bridge's study in design MENG Yun, LIU Dong, SUN Shu-hong 1999, 18(4): 8-12,39.  Abstract ( )   PDF (232KB) ( )   This paper introduces Wujiang bridge's design and construction technology in order to prove this bridge's important value and develop it. Related Articles | Metrics

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The boom's fatigue in joint area of combined cable-stayed suspension bridge SUN Shu-hong, MENG Yun 1999, 18(4): 13-18.  Abstract ( )   PDF (224KB) ( )   Combined cable-stayed suspension bridge is a baby in practice, so there must be some problems.The frontier boom's fatigue plays an important role in this bridge's development and it draws much attention of experts in the world.This paper make a research on this question by several C. C. C. B structural models and proves by facts.And calculation in all hands shows that the fatigue is not an unsolvable question. Related Articles | Metrics

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Experimental study on the scheme of long-span suspension bridge XIANG Zhong-fu, XU Jun-lan 1999, 18(4): 19-22.  Abstract ( )   PDF (155KB) ( )   In this paper, the stiffening measure of long-span suspension bridge of traditional type is studied based on the model test. Related Articles | Metrics

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A study of ratchetting behaviour under proportional and nonproportional cyclic stressing XIANG Yang-kai, GAO Qing, YANG Xian-jie 1999, 18(4): 23-29.  Abstract ( )   PDF (273KB) ( )   The ratchetting experiments of 316L and 1Cr18Ni9Ti stainless steel cyclically loaded under proportional and nonproportional conditions were performed respectively.It illustrated that how the stress amplitute, mean stress and the histories of them influencing ratchetting, The evolution features of ratchetting and conducting factors were investigated.Some significant results which seek to be contributions to the model of ratchetting were obtained. Related Articles | Metrics

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Prestress continuous beam C. C. S. B's performance SUN Shu-hong, MENG Yun 1999, 18(4): 30-39.  Abstract ( )   PDF (385KB) ( )   The functional discontinuity of the C. C. S. B (Combined Cable-stayed Suspension Bridge) beam is a main hindrance to C. C. S. B's application.Whether the prestress technology is effective or not, and by this technology the beam's function is continuous or not is a key question.The paper pays close attention to the research of many bridges' characteristics, and each bridge's analysis is made by four states.Finally, it gives a study about C. C. S. B's span's division. Related Articles | Metrics

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An analysis on arch-bridge spacial resistance against disastrous flood SIAO Sheng-xie, PENG Kai 1999, 18(4): 40-46,60.  Abstract ( )   PDF (284KB) ( )   In this paper the complex load distribution acted by running flood on a typical spandrel filled arch-bridge has been analyzed and calculated, and through a simplified mechanical arch model the corresponding inner section forces are evaluated to render the safety check on the arch spaicial resistance. Related Articles | Metrics

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The principle and method of construction control long span prestressed continuous rigid frame bridge GU AN-bang, CHANG Ying, YUE Yun-xiang 1999, 18(4): 47-53.  Abstract ( )   PDF (262KB) ( )   In this paper, the construction control for prestressed continuous rigid frame bridge is regarded as a stochastic optimal control problem which based on the engineering cybernetics concept.The mathematical model、objective function and physical model is established first, and the closed-loop feedback control system is formed by means of the Kalman's filtering method according to the deterministic optimal control.At the same time, different construction stage is adjusted by computer work station which established on the spot, and the control goal is achieved successfully.The result is used in construction control of Chongqing Huanghuayuan Jialin river bridge. Related Articles | Metrics

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The construction control for Chongqing Huanghuayuan Jialin River bridge GU AN-bang, CHANG Ying, YUE Yun-xiang 1999, 18(4): 54-60.  Abstract ( )   PDF (263KB) ( )   The construction control process of Chongqing Huang-hua-yuan Jia Lin River bridge is taken as an example in this paper.The control principle and method which used in construction control is stated.The controlled object and control variable are defined and objective function is established by stochastic optimal control theory of engineering cybernetics for the error analysis.So the whole construction control is achieved by computer as a measure of joining the two section of a bridge successfully. Related Articles | Metrics

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Repair design of support of Chongqing Beibei Chaoyang suspension bridge ZHOU Shui-xing, XU Jun-lan 1999, 18(4): 61-65.  Abstract ( )   PDF (196KB) ( )   The paper analyses damaging causes for fixed support of Chongqing Beibei Chaoyang Suspension Bridge in high temperature in August 1992.It put forward the idea for changing fixed support into finite displacement supper support based on site and analyses for structural intemal force.It is practical for engineering. Related Articles | Metrics

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Research on multi-phase rupture and simulation of bridges under floods XIAO Sheng-xie, CHEN Hong-kai, WU Guo-song, YANG Bin 1999, 18(4): 66-71,78.  Abstract ( )   PDF (254KB) ( )   This paper an outline of the National fund project,Bridges's Safety Prediction and Behavior Simulation under the Multi-phase Coupling Actions by Flood Water.The authors approach coupling action models among solid,liquid and gas states,while discussing bridge rupture features under these coupling actions.As one important problem of the project,physical and simulation model are discussed too in the paper.All the discussion in the paper can be a guide to deep research of the project. Related Articles | Metrics

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The exploration for new technique of prestressed concrete beams ZHOU Zhi-xiang 1999, 18(4): 72-78.  Abstract ( )   PDF (256KB) ( )   The advantages and limitations of the main types of existent prestressed concrete techniques are discussed in this paper.Several new types of prestressed concrete techniques are proposed preflex bi-prestressed composite beams, preloaded prestressed concrete beams, preloaded prestressed concrete beams with unbonded tendons and vertically tensioned prestressed composite beams.The last types is discussed specifically. Related Articles | Metrics

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The experimental investigation of the vertically tensioned prestressed concrete beam ZHOU Zhi-xiang, XU Mou, LI Zhu-wei, LI Hong-xia 1999, 18(4): 79-84.  Abstract ( )   PDF (233KB) ( )   Based on the Hongchaofang bridge project, the test of a vertically tensioned prestressed concrete beam has been completed to investigate the manufacturing procedure and mechanical behavior.It demonstrates that the vertically tensioned prestressed concrete technique can simplify the construction technique, save materials, improve work efficiency and bring noticeable benefit in terms of technique and economy. Related Articles | Metrics

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Research for the application of the vertically tensioned prestressed concrete beams ZHOU Zhi-xiang, XU Mou, LI Zhu-wei, HUANG Gang 1999, 18(4): 85-90.  Abstract ( )   PDF (226KB) ( )   The vertically tensioned prestressed concrete has been applied to T-beams, box beams and cored slab bridges successfully.It shows that, compared with conventional prestressed concrete beams, the vertically tensioned prestressed concrete beams can simplify the construction technique, save materials, improve the work efficiency and bring noticeable benefit in terms of technique and economy. Related Articles | Metrics

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The algorithm study of interchange ramp construction design ZHOU Shui-xing, ZHANG Min, ZHANG Xue-song 1999, 18(4): 91-95,115.  Abstract ( )   PDF (236KB) ( )   Based on interchange ramp, this paper puts forward a method of interchange ramp elemetn i. e., disposing interchange into indepeadent ramp unit of each other by it.It is first used to make each ramp unit, then combine them into one, finally make interchange by proper editor.It is easy to make complex interchange system and to program. Related Articles | Metrics

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The construction method research of the Wujiang P. F. C cable-stayed and suspension cambination bridge LIU Dong, MENG Yun 1999, 18(4): 96-102.  Abstract ( )   PDF (268KB) ( )   Wujiang Cable-stayed and Suspension Combination Bridge is a new type of bridge which combines cable-stayed bridge and suspension bridge together, and it is also the first bridge of this type in the world.To build the bridge, some new ideas were brought forth in the design of the bridge, and new materials and technology were abopted.The article has intruduced the construction method of using cable platform instead of cate-way, erecting 100 tons of box girder with cableway and cantilever assmblage, tensioning the stays of the cable-stayed bridge by different times. Related Articles | Metrics

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The test and analysis of silica fume concrete with ultra-fine sand GONG Shang-long, CHEN Si-tian, LIU Jing-ying, LIU Da-chao, YI Chui-shan, HUANG Wei-rong 1999, 18(4): 103-115.  Abstract ( )   PDF (477KB) ( )   The paper introduced the properties of the silica fume concrete with ultra-fine sand aggregates based on the lab tests.The tests show that the ultra-fine sand aggregate produced in Chongqing area can be used for the high strength concrete with cube strength 80 MPa or so.The properties of the concrete are much better than ordinary concrete on bent strength, abbreviation and permeability.There is no special requirement to the concrete construction.So, this type of concrete can be used for engineering practice. Related Articles | Metrics

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Longitudinal ventilating calculation on shaft of Zhongliang Maintain and Jinyun Maintain tunnels in Chengdu-Chongqing highway SUO Qi-xu 1999, 18(4): 116-119,130.  Abstract ( )   PDF (189KB) ( )   In recent years, as a result of economical advantage of longitudinal ventilation, it is increasingly widespread applied in all over the world.In our country, the jetting longitudinal ventilating would be actively spread to medium-length tunnels under the finite finance capacity at present. Related Articles | Metrics

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Close-range photography of tunnel SHE Jian 1999, 18(4): 120-124.  Abstract ( )   PDF (226KB) ( )   In this paper, the real-state outline of tunnel excavation is obtained by a close-range photopraphic method.Thereby the over-under-excavated data of any section of the tunnel are found out.In addition, the deformation data of the surrounding rock can be obtain from the surveying results in front and behind.These data can be applied to analyze the stresses of the tunnel structures and determine the best second lining time. Related Articles | Metrics

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Grey system theory in the selection of bridge design plans WANG Cheng, ZOU Yi-song, QU Guang-yi 1999, 18(4): 125-130.  Abstract ( )   PDF (216KB) ( )   The selection of the bridge design plans generally depends merely on the designer's experience at the present time.It exists some one-sidedness unavoidably.In this paper, the gray correlation analysis method in gray theory has been applied to the selection of bridge plans for seeking the best comprehensive result.It gives a definite meaning on avoiding and reducing the errors in designing works. Related Articles | Metrics

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A new simple method to on-line survey and analyse the real-time response of bridges WANG Jia-lin, XIAO Sheng-xie, WU Guo-song, ZENG De-rong 1999, 18(4): 131-137.  Abstract ( )   PDF (247KB) ( )   In this paper, a new simple method is put forward to on-line survey and analyse the real-time response of bridges loaded under random vehicles and people.Based on linear elastic hypothesis and finite element method, the dynamic whole displacement state and load of the bridge can be obtained through surveying partial displacements, so the problem that load is unknown and difficult to determine when calculating is solved in a sense.This method is adapted to girder bridge, arch bridge, cable-stayed bridge and suspension bridge.Through the instrumentality of ways and means in this treatise, a real-time system to survey and analyse a working bridge can be established. Related Articles | Metrics

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Suppositions on simulation models of bridge substructure in collision with other objects PENG Kai, XIAO Sheng-xie 1999, 18(4): 138-141.  Abstract ( )   PDF (158KB) ( )   In this paper suppositions on simulation models of bridge substructure in collision with other objects are reasonably deduced in reference to classical collision mechanics theory, the structural characteristics and the joint features of superstructure、substructure and foundation of each bridge type carefully regarded. Related Articles | Metrics