轨索滑移法节段足尺模型试验研究  

Testing Study of Full-Scale Sectional Model for Rail Cable Launching Method

作　　者：闫勇[1] 沈锐利[1] 唐茂林[1] 张念来 

机构地区：[1]西南交通大学,四川成都610031 [2]湖南路桥建设集团,湖南长沙410004

出　　处：《桥梁建设》2013年第2期46-50,共5页Bridge Construction

基　　金：西部交通建设科技项目(200631879846);中央高校基本科研业务费专项资金资助项目(SWJTU10ZT01)~~

摘　　要：为检验轨索滑移法(一种新的悬索桥加劲梁架设方法)运梁系统的可行性、合理性与可靠性,以矮寨大桥为背景,进行节段足尺模型试验。试验模型选取单侧主缆、6个梁段的节间,模拟5对吊索和吊鞍。通过测试运梁车走行状态、轨索变形、轨索力及吊索力,并与有限元计算结果进行对比,得出以下结论:轨索运梁系统运行平稳,未出现左右摇晃和脱轨现象,运梁系统安全可靠;实测结果与理论计算结果一致表明轨索变形和关键结构受力满足设计要求;选用的轨索、吊鞍及运梁车间的相关参数合理;设计的轨索力大小和安全系数基本合理;增大初始轨索力可使运梁车的通行性得到一定改善。To check the feasibility, rationality and reliability of the girder block carrier sys- tem of the rail cable launching method （a new method for erection of the stiffening girder of sus- pension bridge）, the erection of the stiffening girder of the Aizhai Bridge was cited as an example and the full-scale sectional model testing for the method was made. In the testing model, the one-side main cable and 6 panels of the stiffening girder were employed to simulate 5 pairs of the sus-penders and suspending saddles. According to the testing of the girder block carrier traveling, rail cable deformation, rail cable forces and suspender forces and by comparison of the results of the testing with those of the finite element calculation, the following conclusions were drawn, the operation of the girder block carrier system of the rail cable launching method was stable, the swaying and derailing of the system did not occur and the system was reliable. The agreement of the results of the testing and calculation proved that the deformation of the rail cables and the force conditions of the critical structures could meet the design requirements. The parameters re-lated to the selected rail cables, suspending saddles and the girder block carrier were rational, the designed rail cable forces and safety coefficients were basically rational as well and the increase of the initial rail cable forces could achieve a certain improvement of the traveling of the carrier.

关 键 词：悬索桥 轨索滑移法 模型试验 轨索 有限元法 

分 类 号：U445.4[建筑科学—桥梁与隧道工程] U446.1[交通运输工程—道路与铁道工程]