基础转动结构随机地震响应分析的复模态法  

THE COMPLEX MODE METHOD OF RANDOM EARTHQUAKE RESPONSE ANALYSIS OF STRUCTURES WITH ROTARY FOUNDATION

作　　者：李创第[1] 邹万杰[1] 黄天立[1] 李暾[1] 林志兴[2] 

机构地区：[1]广西工学院土木系,柳州545006 [2]同济大学防灾国家重点实验室,上海200092

出　　处：《工业建筑》2003年第7期29-32,53,共5页Industrial Construction

基　　金：广西青年科学基金 ( 0 0 0 70 0 9);同济大学防灾国家重点实验室访问学者基金 [教技司 ( 2 0 0 0 ) 12 3号 ]

摘　　要：对多自由度基础转动结构随机地震响应问题进行了系统研究。针对用第一振型将上部结构展开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 ,获得了以第一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。该方法可用于隔震结构、加层减震结构。In this paper, the random earthquake response of structure with rotary foundation and many degrees of freedom is studied systematically. The dynamic equations are established firstly, then, the upper structure is unfolded through the first mode. According to the situation that the damping is non\|classical damping and structure is non\|symmetry, the complex mode theory is used to disconnect the equation, and the exact solution of earthquake response which expressed by first mode is obtained. The solution is the exact result of the structure responding to single degree of freedom system. The method of this paper can be used for the random response analysis and the optimization design of the isolation structure, storey\|adding structure and the structure with TMD.

关 键 词：隔震结构 复模态 随机地震响应 基础工程 非对称结构 优化设计 

分 类 号：TU435[建筑科学—岩土工程]