结构在多维地震动作用下抗震计算组合方法  

Modal combination method for earthquake-resistant design of structures to multiple seismic excitations

作　　者：李宏男[1] 孙丽[1] 

机构地区：[1]大连理工大学土木工程系,辽宁大连116024

出　　处：《大连理工大学学报》2003年第3期338-343,共6页Journal of Dalian University of Technology

基　　金：国家杰出青年基金资助项目(50025823);辽宁省青年科研人才培养基金资助项目(973010);辽宁省教育厅重大资助项目(20201056).

摘　　要：假定地震地面运动为平稳随机过程,根据转动分量的频域求法得出了转动分量与平动分量之间的关系;考虑了地震动分量间的空间相关性,用随机过程理论建立了多维地震动作用下结构反应的反应谱组合方法,导出了多维地震动输入下振型相关系数的解析公式.在此基础上,给出了双向地震动作用下的相应公式.数值结果表明,本文提出的方法具有较高的精度.It is assumed that two seismic translational components are the stationary white noisy process. Based on the relationship between the translational and rotational components in frequent domain, the modal combination method for earthquake-resistant design of structures to multiple seismic excitations is presented in terms of theory of stochastic vibration taking into account the correlations of various components and the analytical formulas of correlated coefficients between the modes are given including the influence of multiple seismic ground motions. And then a practical modal combination formula resulting from above results is derived under two horizontal seismic components. Numerical results show that the approaches presented here are of enough accuracy.

关 键 词：建筑结构 抗震设计 计算方法 多维地震动作用 空间相关性 组合方法 相关系数 

分 类 号：TU352.11[建筑科学—结构工程]