场地液化危害的概率分析

为使场地液化危害程度的估计建立在以概率论为基础的可靠性分析之上,本文提出二种估计场地液化危害程度的概率方法,二种方法分别采用不同的途径处理地震和岩土的不确定性,不仅分析了一点液化的概率,而且提供了估计整个土层住状液化概率的方法,文中最后通过算例简要讨论了液化概率分析结果的工程应用。

PROBABILITY ANALYSIS FOR SITE LIQUEFACTION HAZARD

Site liquifaction potential judgement and hazard analysis are important contents of seismic stability evaluation of engineering site and urban seismic microzonation. In order to make compatibility with structural safety design method, which is based on probability theory, two seismic hazard analysis methods of soil liquifaction in consideration of uncertainty of the earthquake occurrence, the wave propagation and soil stratum parameters have been proposed. These methods not only can to analyze liquefaction probability of soil at given point, but also give the probability distribution of site liquefaction potential in given soil layers. The results in this paper have offered some fundamental materials for setting up the seismic design method of building foundation on the basis of reliability theory.