大跨度结构TMD减震系统多点激励的地震随机响应分析  

Random response analysis of long span structures with TMD under multiple support excitation

作　　者：吴春秋[1] 朱以文[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《地震工程与工程振动》2003年第4期131-135,共5页Earthquake Engineering and Engineering Dynamics

摘　　要：众多研究表明,对大跨度结构进行抗震分析时,必须采用非一致地震激励模型。本文对带TMD系统的大跨度结构考虑地震行波效应后的随机地震响应问题进行了研究。文中建立了结构的动力方程,并利用虚拟激励法求解。研究结果表明,对于大跨度结构装设TMD子结构以后可显著地降低结构的位移、速度和加速度响应,但在设计TMD减震系统时,必须考虑到地震激励的非一致性,否则可能会使预期的减震效果失效。Many studies have shown that non-uniform seismic excitation model should be adopted in seismic analysis of long span structures. In this paper, the study on random response of long span structures with TMD taking the traveling effect of earthquake into account is performed. The dynamic equation is established firstly, and then the pseudo-excitation method is employed to calculate the equation. The investigation results show that the TMD can reduce the displacement, velocity and acceleration remarkably of long span structures, and the non-uniform earthquake excitation must be taken into account when designing the TMD system, otherwise the vibration reduction system may be invalid.

关 键 词：被动调谐减震控制体系 大跨度结构 TMD 地震随机响应 多点激励 减震方案 

分 类 号：P315.9[天文地球—地震学] TU352.1[天文地球—固体地球物理学]