【摘要】 地震动的强度和频率全非平稳性对结构反应具有重要的影响,尤其对结构非线性反应更为敏感。在平稳地震动过程的Clough-Penzien功率谱基础上,建议一类全非平稳地震动加速度过程的广义Clough-Penzien演变谱模型。应用非平稳随机过程模拟的谱表示-随机函数方法,针对我国《水工建筑物抗震设计规范》(DL 5073–2000)中的4类场地条件,进行全非平稳地震动演变功率谱模型的参数识别研究。同时,建立4类场地条件下的水工建筑物抗震设计所用地震动的代表性样本集合,为水工建筑物抗震设计提供合理的地震动输入。更多还原

【Abstract】 Non-stationary ground motion with intensity and frequency has important influence on seismic response of structures, especially, on nonlinear response will be more sensitive. Based on the Clough-Penzien power spectrum of stationary ground motion processes, a new evolutionary power spectrum model of non-stationary ground motion is suggested. According to the four types of site condition in the specifications for seismic design of hydraulic structures, the hybrid spectral representation & random function approach of non-stationary stochastic processes is used to identify these parameters of the evolutionary power spectrum model, and generate the representative sample ensemble of non-stationary ground motion. In practice, these representative samples of ground motion can be used to analyse seismic response of hydraulic structures.更多还原