摘要
钢箱梁结构在现代大跨度悬索桥体系中较多采用。作为最主要的组成部分之一,其在车辆荷载作用下的受力状态倍受关注。然而目前通过有限元计算还难以获得钢箱梁各细部构造的精确应力值。本文以润扬长江公路大桥南汊悬索桥为背景,介绍了该桥静动载试验中的车辆加载工况和钢箱梁测试截面应力测点的布置等。利用该桥钢箱梁实测应力结果,分析了多种车辆荷载工况下大跨度悬索桥钢箱梁的应力水平及其分布,同时进行了钢箱梁各测试截面受力状态的对比研究,在此基础上总结了大跨度悬索桥钢箱梁结构在车载作用下的受力特点。研究结论为同类钢箱梁的受力状态分析提供了参考依据。
Steel box girder is widely used in modern long-span suspension bridge structure. As one of the most important bridge components, the force state of steel box girder under vehicle loads is especially concerned. However, it is difficult to achieve accurate stress values on each part of a steel box girder through finite element calculation. In this paper, taking Runyang Suspension Bridge （RSB） as an example, the vehicle load cases and stress measurement point layout of a selected steel box girder section in field test of RSB are presented. Based on the measured stress results, the stress level and its distribution on the steel box girder of a long-span suspension bridge under various vehicle load cages was analyzed, and the force state comparison analysis of different steel box girder sections was carried out. Finally, the steel, box girder force characteristics of a long-span suspension bridge were summarized based on above results, which provides references for analyzing force state of similar type steel box girder of long-span suspension bridges.
出处
《实验力学》
CSCD
北大核心
2009年第1期27-34,共8页
Journal of Experimental Mechanics
基金
国家杰出青年基金项目(50725828)
国家"863"计划项目(2006AA04Z416)
国家自然科学基金重点项目(50538020)
国家自然科学基金青年基金项目(50378017)
国家教育部博士点基金资助项目(200802861012)
关键词
大跨度悬索桥
钢箱梁
车辆荷载
受力状态
long-span suspension bridge
steel box girder
vehicle load
mechanical condition
