基于反应谱的结构体系平稳随机地震反应分析

Analysis of Random Seismic Response of Soil-Structure System Based on Response Spectra

利用功率谱与反应谱的转换关系,提出了分析土与结构相互作用系统的反应谱分析方法,该方法利用新规范中的加速度反应谱作为目标谱,计算与之相对的功率谱并按该功率谱作为地震输入谱进行结构体系随机地震反应分析,最后通过算例说明该方法的有效性.

Based on relationships between power spectral density function and response spectrum,a response spectra method is proposed for stationary response of soil-structure system under seismic excitation. The seismic excitation is assumed as a stationary process. According to the transfer relation of the power spectral density and response spectra in time-invariant linear system to random excitation, the stationary response statistic is obtained. Numerical calculation shows that the proposed method is an effective approach for soil-structure interaction system.