基于反应谱的土与结构相互作用体系演变随机激励响应

利用功率谱与反应谱的转换关系,建立了演变随机过程输入功率谱密度函数表达式,提出了分析土与结构相互作用体系演变随机过程的反应谱分析方法,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土与结构相互作用体系随机地震反应分析.研究表明,该方法反映了地震动和相互作用体系的动力特性,是进行土与结构相互作用体系随机地震反应分析的一种有效方法.

Response spectra methods of the evolutionary stochastic excitation for seismic response of soil-structure system

Based on relationships between power spectral density function and response spectrum, the stochastic evolutionary process input power spectral density function is established. The response spectra method of the stochastic evolutionary process is proposed in this paper for non-stationary response of soil-structure system under seismic excitation. The new code acceleration response spectrum is used as the object spectrum and corresponding power spectral density function is used as input spectral density function and the random seismic response of soil-structure interaction system is analyzed. The research shows that the proposed method describes the dynamic characters of earthquake motions and interaction system, and is an effective approach for soil-structure interaction system analysis.