大型斜拉桥风致振动可靠性分析方法  

Reliability analysis method for wind-excited vibration of large-stayed bridges

作　　者：余建星[1] 何斌[1] 杨钢[1] 

机构地区：[1]天津大学建工学院,天津300072

出　　处：《地震工程与工程振动》2003年第1期50-53,共4页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然基金(59979018)资助项目;教育部博士点基金资助项目

摘　　要：本文研究了大型柔性结构的非线性动力学行为及其引起的异频共振,提出了大型柔性结构的可靠性分析方法,并以大型斜拉桥的风致振动为例,通过对系统失效形式的分析,利用可靠性理论对其进行可靠指标计算。这种方法应用于大跨度悬索斜拉桥的方案优选及可靠性分析中,在处理几何非线性及动力问题时有较好效果。The nonlinear dynamical behaviour and the different frequency resonance of largesize pliable structure are investigated, and a reliability analysis method for the largesize pliable structure is presented. Taking an example for the windexcited vibration of largeslayed bridge, we can use the method for calculating the reliability indexvia system invalidity form analysis. The method can be applied to the the project choosing and reliability analysis, which can acquire good effect in geometrically nonlinear and dynamical problem.

关 键 词：斜拉桥 动力分析 非线性 可靠指标 风致振动 失效形式 环境荷载 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]