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15 June 2006, Volume 25 Issue 3 Previous Issue    Next Issue

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The numeric calculation in FEA method CHEN Qing-jun， GU An-bang 2006, 25(3): 1-2.  Abstract ( )   PDF (152KB) ( )   As a numeric method，FEA mainly deals with the total stiffen matrix．In this paper，we can seethe progmm can run effectively with the mixead-Language program and the superiority of FORTRAN in numeric calculation．At last some typical numeric functions are given References | Related Articles | Metrics

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Application of compound reinforcement technology MENG Yun， LIU Yan-ke， ZHANG Hui-li 2006, 25(3): 3-5.  Abstract ( )   PDF (186KB) ( )   Qijian Bridge，which locates in the line from Yanjia County to Kai County，is now a bridge not suitable to a special and emergent tran sport mission．This paper introduces the calculation process an d co nstruction techniques of a compo und reinforcement method of bridge strengthening 。i.e．bonding steel plate together with casting FRC．Successful pass of the heavy motorcade indicates the applicability and usefulness of this method in the reinforcement of old bridge. References | Related Articles | Metrics

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Reason analysis and preventive measures for cracking of prestressed concrete continuous box girder bridges JIA Jia ， PENG Wei 2006, 25(3): 6-8.  Abstract ( )   PDF (181KB) ( )   Some factors that induce cracking of prestressed concrete continuous box girder bridges are discussed，such as prestressing tendons， calculation method，temperature stress，concrete stress control，ere．The results obtained from the calculation are presented to demonstrate the effect of these factors．Several design recommendadons and construction measures are proposed to resist cracking 0f long-span continuous box gilder bridge． References | Related Articles | Metrics

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A probe into the calculation method 011 coping's internal force of pillar pier HU Dong， HU Mian-yi 2006, 25(3): 9-12.  Abstract ( )   PDF (167KB) ( )   The paper sets forth the calculation method of coping’s internal force undertow different calculation graphic formulas and comparative analyses are made．As indicated in the analyses：the coping's internal force shall be quadrate allocated when the rigidity of the pillar is taken into account which leads to the diminution of middle span positive flexural torque and augment of fulcrum neglttive flexural torque (cauea Rigid Frame Effect).It goes priminently as the linear rigidity ratio of the pillar and coping increases.When the linear rigidity ratio is small，simplified twill-cantilever free beam(continuous beam)graphic formula shall be adopted whereas the fulcrum section shall be properly reinforeed；while to the important briages or briages with hrge linear rigidity ratio ofthe pillar and coping，twill-cantilevelr rigid-framed structure graphic formula shall be appropriately usedfor calculation. References | Related Articles | Metrics

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Static experimental analysis of a three-span continuous rigid bridge ZHOU Bing， SHI Shang-wei 2006, 25(3): 13-17.  Abstract ( )   PDF (216KB) ( )   In the paper a three-span continuous rigid bridge in Leshan city had been tested about its stresses，deflection and cracks under experimental loads，and the structural rigidity，material strengths and anti-crack perIormanes analysed to appraise the actual carting capacity of the bridge．The work could provide usdul references for design and construction of the similartype of bridges． References | Related Articles | Metrics

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Analysis of shear connector of box girder with corrugated steel webs ZHONG Hao， XU Jun-lan， GU An-bang， HU Xu-hui 2006, 25(3): 18-20.  Abstract ( )   PDF (175KB) ( )   The prestressed concrete composite box girder with corrugated steel webs is a new type of steel-concrete composite structure，which is have been extensive used in Japan and European countries lies in its super-performance on mechanics，because the superiority is ma g fully utilize of material characteristic of the stel and concrete． Shear connector is a decisive factor whether it can provide a sufficient integrated action to the composite structure or not．The paper introduces the analysis of mechanics capability and design methods of shear connector of the box girder with corrugated steel webs．Furthermore，example of shear connector design in first similar internal bridges— DA YAN HE bridge is offer． References | Related Articles | Metrics

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Construction management of expansion joint of bridge on highway HUANG Long-xian ， YANG Hu-gen， JIANG yu 2006, 25(3): 21-25.  Abstract ( )   PDF (379KB) ( )   The successful experience of bridge expansionjoints installation Wanliang and Liangchang highway is introduced．Some rules of the project management system are proposed．The damage mechanism of the bridge expansionjoints is analyzed and some technical parameters is given for reference． References | Related Articles | Metrics

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The application and structure of hydraulic clhnbing form system LONG Qiong，ZHANG Gang 2006, 25(3): 26-31.  Abstract ( )   PDF (324KB) ( )   The structure and ereetion process of hydraulic climbing form system are not only introduced specially，but also the main working procedure and technical requirements are analyzed． References | Related Articles | Metrics

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Prediction of nerve network on surrounding rock deformation in Yangzong hightway tumnnel XU Lin-sheng 2006, 25(3): 32-35.  Abstract ( )   PDF (156KB) ( )   The suurrounding rock deformation of highway tunnel is an important index to assess its stability and economy of support structule in NATM．It is a data column which is related with measurement time sequence,so we can set up some effective models and methods to pledicate the surrounding rock deformation．According to the surrounding rock deformation characteristic of Yangzong highway tunnel，this paper sdopts the nerve network technology to predict the subsidenee displacements．The research results show this prediction method is simple and effective． References | Related Articles | Metrics

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Numerical simulafion of asphalt pavement crack propagation and analysis of influence factors MAO Cheng， QIU Yan-jun ， LI Yun-peng 2006, 25(3): 36-39.  Abstract ( )   PDF (279KB) ( )   In order to study asphalt pavement crack propagation paths,the linear elastic fracture mechanics(LEFM) theory and finite element method(FEM) that incorporate traffic load and temperature stress are used in this paper.Using quarter point collapsed singular isoparametric element, the stress singularity at the vicinity of crack tip is simulated.The crack propagation paths are simulated by using window moviing; tech- nique(WMT).Based on these,an asphalt pavement crack propagation paths simulation(APCPPS2D)program is developed.Under the various load location cases, the crack propagation behavior of surface crack and base bottom crack are simulated using APCPPS2D.The influences of layer modulus combination on pavement cracking are studied.The simulation results indicate that this method can simulate crack propagation paths and help to understand crack behavior of asphalt pavement in a better way. References | Related Articles | Metrics

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The AHP-Fuzzy method apply in the evaluation of concrete pavement distress HAN Zhen-zhong,WANG Yu 2006, 25(3): 40-43.  Abstract ( )   PDF (172KB) ( )   The evaluation of the condition of concrete pavement distress is an important part of pavement management system,by which the strategies of pavement maintenance are made. In this paper,the author sets forth a set of indices for evaluating the condition of concrete pave- ment distress by analyzing; the research results of the past about concrete pavement evaluation,and adopt the AHP method to construct hierarchy analysis model for determining the weight of each index in the evaluation of the condition of concrete pavement distress. Finally,the autbor presents a fuzzy mathematics model for comprehensively evaluating the condition of concrete pavement distress. References | Related Articles | Metrics

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Assure the minimum hortative wavelength by the international roughness index WU Yong，HEI Peng 2006, 25(3): 44-45.  Abstract ( )   PDF (137KB) ( )   The international roughness index is the normalized measurement way about roughness in the world. The hortative wave-length affected by some factor,is aestimated scope. This text will draw on the international roughness index to deduce the minimum hortative wavelength,so as to reduce the error during the model conversation and numerical calculation of roughness. References | Related Articles | Metrics

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Study on the third level climatic zoning for highway in Sichuan and Chongqing LI Xu,LIANG Nai-xing 2006, 25(3): 46-49.  Abstract ( )   PDF (231KB) ( )   Combined with the first and second level in the <>nowadays,this paper discusses the principles and the methods of executing the third level climatic zoning for highway in Sichuan and Chongqing,so that the climatic zoning for highway between provinces can provide more comprehensive fundamental data,and enhance the o