论文部分内容阅读
本文目的是提出液化危害性分析的定量方法。基于宏观液化震害资料文中指出,砂土地震液化造成的主要破坏形式是建筑物的不均匀沉降。文中并指出,引起砂土壤震陷的原因有三个:土壤软化、再固结变形和土层坍陷。其中最主要的是软化性震陷。文中介绍了一系列土壤震陷试验研究结果和相应的经验关系式。文中基于“软化模型”概念编写了分析震陷的专用程序,计算了33个液化实例,计算结果与观测震陷值颇为一致。文中提出了按计算震陷值划分液化危害程度的方法,并研究了输入地震、基底压力,建筑物高度和非液化土层等对液化震陷的影响。
The purpose of this paper is to propose a quantitative method for liquefaction hazard analysis. Based on the macroscopic liquefaction damage data, it is pointed out that the main form of damage caused by liquefaction of sand and soil is uneven settlement of buildings. The article also pointed out that there are three reasons for the sand-induced soil subsidence: soil softening, consolidation and deformation and soil depression. The most important of these is softening shocks. In this paper, the results of a series of soil seismic surveys and corresponding empirical relationships are described. Based on the concept of “softening model”, a special program for analyzing the seismic depression is compiled and 33 liquefaction examples are calculated. The calculated results are in good agreement with the observed seismic collapse values. The paper proposes a method for calculating the damage degree of liquefaction based on the calculation of seismic depression value, and studies the influence of input earthquake, basal pressure, building height and non-liquefied soil layer on liquefaction earthquake subsidence.