砂土液化诱发的地面侧移机理研究  

STUDY ON MECHANISM OF GROUND LATERAL DEFORMATION INDUCED BY LIQUEFACTION

作　　者：景立平[1] 王绍博[1] 张荣祥[1] 

机构地区：[1]国家地震局工程力学研究所,建设部综合勘察研究院

出　　处：《地震工程与工程振动》1996年第3期128-136,共9页Earthquake Engineering and Engineering Dynamics

基　　金：地震科学联合基金

摘　　要：本文分析了砂土液化诱发的地面侧移的机理，提出了估计砂土液化诱发的地面侧移的一种新方法。该方法是用饱和砂层中孔隙水压力的发展规律，在每个应力循环内对土壤的抗剪强度进行修正，然后在每个应力循环内应用Ｎｅｗｍａｒｋ刚性滑块模型计算地面侧向永久位移。对比计算表明，本文提出的方法在物理机制上更加合理，计算结果与宏观震害现象十分吻合。In this paper, the mechanism of ground lateral deformation caused by liquefaction is analysed.A new method is presented to evaluate the permanent lateral displacements of ground due to seimically induced liquefaction.This method uses the law of pore pressure in saturated sand to revise the yield strength of sand,and the model of Newmark's rigid block is used to calculate the permanent lateral displacements of ground in every stress cycle. The method presented is more resonable in physical mechanism and the numerical results are coincident with the earthquake damage.

关 键 词：砂土液化 抗剪强度 地面侧移 

分 类 号：TU435[建筑科学—岩土工程]