土层随机地震反应的动力可靠度计算

Dynamic reliability calculation for random seismic response of soil layers

研究了土层的随机地震反应分析方法 ,建立了基岩输入地震动加速度功率谱函数为白噪声和过滤白噪声时土层的动力可靠度计算理论。结果表明 ,首次超越破坏机制比疲劳破坏机制计算简单 ,它既能给出土层在时间 t内首次超出某一限值 b的破坏概率 ,也能给出在某一限值时的破坏时间 ,是进行土层地震动力可靠性分析的有效方法。

When seismic acceleration power spectrum of bedrock input are white noise and filter white noise,the theory of dynamic reliability calculation for the random seismic response of soil layers is proposed. The results indicate that first passage failure criterion is simpler than fatigue failure criterion in calculation, and it can give failure reliability when soil layers first passage some limit value b in time t as well as failure time in that. So it is an effective method in seismic dynamic reliability calculation.