【摘要】 基于模态综合理论提出一种斜拉桥抖振时域分析实用方法.在桥梁随机风场数值模拟的基础上,建立斜拉桥时域抖振分析计算模型.该方法简化了自激力时域化过程,并在计算中考虑了气动刚度、气动阻尼和气动耦合作用对结构响应的影响,提高了斜拉桥抖振时域分析的效率.通过对一座大跨斜拉桥的抖振时域分析,验证方法的正确性和可行性.更多还原

【Abstract】 A practical method of buffeting analysis in time domain for cable-stayed bridges was presented based on the mode integration theory.Analysis and computation model of time domain buffeting of cable-stayed bridge was built up on the basis of numerically simulating the stochastic wind field around the bridge.Using this mothed,the process of transformation of self-excited force into time domain was simplified,and the influence of aerodynamic stiffness,aerodynamic damping and aerodynamic coupling on structure response was considered,so that the computation efficiency of buffeting analysis for cable-stayed bridge was improved.By applying this method to a large-span cable-stayed bridge,the validity and feasibility of this method was verified.更多还原