摘要
本文对多自由度基础平动结构随机地震响应问题进行了系统研究。针对用第1振型近似代表上部结构所得方程为非经典阻尼和非对称结构情况,用复模态法解耦,获得了以第1振型表示的结构地震响应的解析解,对单自由度体系,此解即为结构响应的精确解。本文方法也可用于带TMD减震结构等的随机地震响应分析与优化设计。
In this paper, the random earthquake response of structure with multi-degree-of-freedom is studied systematically. The dynamic equations are established firstly, then the upper structure is simplified with the first mode. According to the situation that the damping is non-classical and the structure is non-symmetric, the complex mode theory is used to decouple the equations, and the exact solution of earthquake response, which is expressed by first mode is obtained. The solution is the exact result of the structure corresponding to single-degree-of-freedom system. The method in this paper can be used to the random response (analysis) and the optimization design of the structure with TMD.
出处
《地震工程与工程振动》
CSCD
北大核心
2003年第6期44-49,共6页
Earthquake Engineering and Engineering Dynamics
基金
广西青年科学基金(0007009)
教育部国家重点实验室访问学者基金[教技司2000(123号)]
广西工学院博士基金联合资助
关键词
结构地震响应
复模态
运动方程
优化设计
complex model
random earthquake response
structure-soil interaction
