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15 August 2007, Volume 26 Issue 4 Previous Issue    Next Issue

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Application of Fuzzy Optimization Design to Anti-wind Sructure YU Qi, WANG Jia-lin 2007, 26(4): 1-2.  Abstract ( )   PDF (170KB) ( )   Applying the fuzzy optimization design model to traditional anti-wind structure，the anti-wind structure design will be sounder than before，because the structure contains many fuzzy factors，such as the wind levels and the building posture. References | Related Articles | Metrics

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Influences of DiaphragMat the Root of Pier on the Behaviors of Roof-board LI Sheng-hua，ZHOU Zhi-xiang，ZHANG Xin 2007, 26(4): 3-5.  Abstract ( )   PDF (237KB) ( )   Generally a diaphragm is set between the rof of the pier and the mid-span in order to enhance the rigidity refers to the bend-resistance of the box-beam structure in the same direction with the bridge and the twist-resistance cross wise．However，near the diaphragm section，the diference of strength function is obvious comparing to the convention section，which is usually be ignored during the design process．Taking the rof-board crack near the pier of a bridge for example，the diaphragm 's influences on the mechanics function of the roof-board are analyzed specifically．The results show that the strength situation is obviously different between the rof-board around the diaphragm and those section far away from it． References | Related Articles | Metrics

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Causes and Precautionary Measures to Long-terMDeflection of Long Span Pre-stressed Concrete Box Girder of Continuous Rigid Frame Bridge CHEN Yu-feng，XU Jun-lan，YU Wu-jun 2007, 26(4): 6-8.  Abstract ( )   PDF (231KB) ( )   At present,the main problems of long span pre-stressed concrete box girder of continuous rigid frame bridges are excessive mid-span deflection and cracks in box girders．The three influences factors of long-term deflection including shrink- age and creep of concrete，the pre-stressed loss and cracks in box girder are discussed．The deflection from shrinkage and creep of concrete is hardly calculated exactly．So the counterm easures for the design and construction against the deflection are put forward based on the infl uence mechanism． References | Related Articles | Metrics

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Analysis of Parameters Afecting the Midspan Deformation of Continuous Rigid Frame Bridge XU Zhen，ZHANG Xue-song，XU Jun-lan 2007, 26(4): 9-13.  Abstract ( )   PDF (263KB) ( )   Continuous rind frame bridge with box section is one of the most popular stmeture types in the bridge construction in China．Big widespread deformationin often appears in midspan of the brigdeS．Factors afecting deformation of the midspan of continues rigid flame bridge are plentiful and complex．The key factors afecting continuous rind frame bridge midspan deform ation were analyzed and summarized．By the basis of a continuous rigid flame stucture-Baiguodu Bridge，various parameter af ecting continues rigid flame bridge deform ation were analyzed．The prevention an d cure measures on this foundation are put forward． References | Related Articles | Metrics

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NeWMethod for Frame Reliability LIU Xiao-yu，WANG Jun-Jie 2007, 26(4): 14-17.  Abstract ( )   PDF (182KB) ( )   The gradient optimization algorithm based on the stochastic finite element Was adopted to analyze the reliability of the frame with stochastic parameters. A computer procedure was programed and a contrast was carried out between the conpute letsult of this method and that of the Monte Carlo method.The conclusion iS proved that this method used in the frame reliability analysis is feasible and reliable.This method not only has avoided the oversized 1oad of Monte Carlo computation，but also is more reasonable than the traditional definite value analysis method more close to the reality. References | Related Articles | Metrics

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Genetic Analysis of Oblique-slab Glide and Rotation within Surface under CrossfaU Condition LI Jing-yi ，ZHANG Hong-jie 2007, 26(4): 18-19.  Abstract ( )   PDF (195KB) ( )   The damage condition of existing obliques slab bridge demonstrates that most of them would de and rotate within the surface.Based on the damage features of Tanghe Bridge and the existing computational theory of oblique slab bridge，the glide force along cross direction and unbalance moment were found as the damage's cause．Then,several suggestions are presented for future's design and construction. References | Related Articles | Metrics

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Static Analysis of Slope Cable-stayed Bridge Tower in Construction Stage WANG Xin-zhong ，ZHOU Shui-xing ，WANG Wei-sheng ，LIU Su-ling 2007, 26(4): 20-23.  Abstract ( )   PDF (217KB) ( )   The installation of longitudinal slope of a cable-stayed bridge has efects on the design，construction and stability of a bridge．But a symmetry double slop is quite diferent from a one-way slope.The model of Pengxi River Cable-stayed Bridge structure witlI one-way slope and that of a symmetry double slop bridge were analysed with finite element analysis．It provides reference for the design and constructions of such kind. References | Related Articles | Metrics

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Research on Methods for Determining the Reasonalbe Cable Tension in Completion State of Cable-stayed Bridge WANG Wei-sheng ，QIU IJong ，LI Jian-wei 2007, 26(4): 24-28.  Abstract ( )   PDF (267KB) ( )   By analyzing and comparing some methods for determining the reasonable tension in the completion state of cable-stayed bridge．that there are respective merits and demerits of each method are put flr0ward．The unreasonable results are often deduced only in one way.A comprehensive way to determine reasonable cable forces is introd uced by the example of the Pengxihe Bridge，and the method proved to be valid. References | Related Articles | Metrics

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Analysis of Common Reinforcement Methods and Application Characters of Arch Type Bridges TAN Yong ，ZHOU Jian-ring，SHEN Xiao-jun，HA0 Yi ，TAN Long-you ，ZHOU Yong 2007, 26(4): 29-31.  Abstract ( )   PDF (190KB) ( )   Three kinds of common reinforcement methods for arch bridges are introduced．The application characters of them are analysed from several aspects such as the technique，economy，usage and beauty based on an engineering example．The resuit will be very useful for reitforcement designers． References | Related Articles | Metrics

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Reliability Evaluation of In-service Long-span Bridges Based on Remote Monitoring Theory ZHOU Jian-ting， XIANG Yu-zhi ，HAO Yi ，SHEN Xiao-jun ，ZHOU Zhi-xiang ， JIANG Zhen ，DONG Zhi-qing ，LI Hong-di ，ZHOU Yong ，TAN l ong-you 2007, 26(4): 32-35.  Abstract ( )   PDF (219KB) ( )   0n the basis of an existing bridges，the long·span bridges monitoring evaluation theory are introduced，especially focusing on the long-span bridges monitoring evaluation system based on the reliability theory by detailing procedures such as acquiring the load efect parameters，acquiring bridge structure resistnce parameters and conducting the calculation of dynamic reliability，and so on．The system proposed in the paper has proved to be efective in actual bridge monitoring tasks. References | Related Articles | Metrics

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Concrete Structure Crack Real-time Monitoring SysteMand Its Algorithm ZHANG Kai-hong，ZHANG Ben-niu 2007, 26(4): 36-41.  Abstract ( )   PDF (442KB) ( )   The concrete structure crack monitoring system was designed because the existing monitoring technologies couldnt monitor the actual situation of the concrete structure damage roundly with rea1-time．Construction，work principle and algorithm On crack identifying of this momtoring system were studied ，and the related experiment was done，too．This system can monitor concrete construction actual damage roundly，and extensively apply to monitoring the damage of bridge，dam and oth· er large concrete construction． References | Related Articles | Metrics

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Discussion on the Precise Levelling Method for Bridge Deflection LIU Shan-hong，GENG Jian-li 2007, 26(4): 42-45.  Abstract ( )   PDF (251KB) ( )   The measuring principle of bridge deflection is set forth by using precise levelling method：and the accuracy of three kinds of precise levelling methods for b~dge deflection are compared according to the testing results in situ．It is confirms that making use of the precise levelling method to measure the bridge deflection has a great deal advantages and useful values． References | Related Articles | Metrics

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Influences of Wind Load on the Stability of Concrete Filled Steel Tube Arch Bridge in Construction WANG Yuan-qing ，JIANG Bo ,ZHANG Yong ,SHI Yong-jiu 2007, 26(4): 46-50.  Abstract ( )   PDF (258KB) ( )   There is little research on the wind-induced lateral torsional buckling stability problem for long-span concrete filled steel tube arch bridge．Through a practical bridge，the stability of CFST arch bridge sufered wind load was analyzed．The resuits show that the stronger the wind rapidity is，the smaler the coeficients of stability is，and weak wind have little influence on the stability，but the strong wind afects greatly on the stability of