摘要
针对跨径为（７６＋３６０＋７６）ｍ的某大跨度钢管混凝土系杆拱桥的特点，详细介绍了其分析模型的建立方法，动力特性特点及其在地震动作用下的响应，并深入讨论了不同行波波速对该拱桥地震反应性能的影响。分析表明，主拱肋跨中截面的地震反应内力较小，而拱脚截面和ｌ／４～３ｌ／８等截面的地震反应内力则相对较大。行波效应对拱桥的地震反应有较大的影响，一般来说考虑行波效应后其竖向位移、轴力均增大，而横向位移则减少。
A seismic response model of long span concrete filled steel tube (CFST) arch bridge is set up. Taking a bridge of 76+360+76 m span concrete filled steel tube tied arch bridge as an example, the seismic response behavior is systematically studied. The results show that in the apex of arch the response member forces are low, while response horizontal displacement is maximum, forces in the springing of main arch rib are relatively large, and the non synchronous support motion due to the traveling seismic wave may have a significant effect on the response. They tend to increase the axial force of arch rib and vertical displacement and decrease the horizontal displacement.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1999年第3期320-324,共5页
Journal of Southwest Jiaotong University
关键词
拱桥
地震反应分析
行波效应
钢管混凝土
arch bridge
seismic response analysis
the effect of traveling seismic wave
concrete filled steel tube
