不规则结构在多维非平稳随机激励下的动力响应分析

Analysis for Dynamic Response of Irregular Structure under Multi-Dimensional Non-Stationary Random Excitations

摘要: 本文着重研究不规则结构在多维地震动激励下的动力响应分析，基于等效激励法构造了多维地震动激励，考虑了随机激励功率谱在时域和频域上的非平稳性，同时模型中也考虑了场地等因素的影响。对一个典型的框架–筒体不规则结构进行了数值仿真，结果表明同时考虑激励的非平稳特性和多维激励对结构的动力响应至关重要。

Abstract: Dynamic responses analysis of an irregular structure under multi-dimensional seismic excitations is studied, in which the seismic excitations are constructed by equivalent excitation method, while the non-stationary features of the input power spectral density both in time domain and frequency domain are considered, and the characteristics of local site are also incorporated in the model. The simulation of a typical frame-tube building is carried out; the results demonstrate that those factors mentioned are very essential to the dynamic responses of the structure.