结构工程师2024，Vol.40Issue(3)：8-15,8.
吊杆索力变化对超大跨径悬索桥加劲梁弯矩影响分析
Analysis of Influence of Suspender Cable Force Change on Bending Moment of Stiffening Girder of Super-Long Span Suspension Bridge
卢超 1吴文明 2王奎 1苗庭选 1熊海涛 3辛灏辉 4刘杰林 4刘秉峰4
作者信息
- 1. 湖北联合交通投资开发有限公司,武汉 430056
- 2. 北京公科固桥技术有限公司,北京 100088
- 3. 中路高科交通检测检验认证有限公司,北京 100088
- 4. 东南大学桥隧与地下工程系,南京 211102
- 折叠
摘要
Abstract
After long-term service on a long-span suspension bridge,the cable force of some hangers can easily deviate from that of the completed bridge.However,the effect of the change in local hanger cable force on the bending moment of the whole main girder is unknown.In this paper,the Wuhan Yangluo Bridge is taken as the research object,and numerical analyses of a long-span suspension bridge are carried out.The validity of the finite element model is verified by comparing it with actual bridge test data.Based on the verified numerical model,a parametric analysis was carried out to study the effect of 10％,15％,and 20％negative deviations of local single and three suspender cable forces(less than the cable force of the bridge)on the maximum bending moment of each beam section of the steel box girder.The results show that the negative deviation of single or three suspender cable forces is linearly related to the bending moment variation of a steel box girder.When the single suspender cable force has a 20％negative deviation from the bridge state,the bending moment of the steel box girder increases by 40％to 97％.When the cable force of the three suspenders has a negative deviation of 20％compared with the bridge state,the bending moment of the steel box girder increases by 195％to 445％.关键词
大跨度悬索桥/吊杆索力偏差/钢箱梁弯矩/数值仿真Key words
long-span suspension bridge/deviation of suspender cable force/steel box girder bending moment/numerical simulation引用本文复制引用
卢超,吴文明,王奎,苗庭选,熊海涛,辛灏辉,刘杰林,刘秉峰..吊杆索力变化对超大跨径悬索桥加劲梁弯矩影响分析[J].结构工程师,2024,40(3):8-15,8.
