考虑地震输入机制的强度折减动力有限元方法  

A strength reduction dynamic FEM including the seismic input mechanism

作　　者：王璨[1] 张伯艳[1] 李德玉[1] 

机构地区：[1]中国水利水电科学研究院工程抗震研究中心,北京100048

出　　处：《中国水利水电科学研究院学报》2015年第2期100-105,共6页Journal of China Institute of Water Resources and Hydropower Research

基　　金：水利部公益性行业科研专项资助项目(201001035)

摘　　要：为研究边坡在地震作用下的稳定安全性和地震波在边坡介质中的传播,基于强度折减原理,提出了能计入无限地基辐射阻尼效应的边坡地震动力显式有限元方法和与之对应的边坡失稳判定标准。编写相应的计算机程序与ANSYS/LS-DYNA计算软件实现了无缝连接。经典算例表明,本文强度折减方法和失稳判据的正确性以及ANSYS/LS-DYNA无反射吸能边界的适用性,边坡工程实例分析表明上述方法在边坡动力稳定分析中具有一定的可行性。In order to study the safety of slope stability during earthquakes and seismic wave propagation in slope media, on the basis of strength reduction theory, this paper introduces a slope seismic dynamic explicit finite element method including unlimited foundation radiation damping effect and proposes some corresponding slope instability criteria. This paper also develops the related coding computer programs that seamlessly match the corresponding ANSYS/LS-DYNA software. Moreover, some classical calculating examples show the correctness of strength reduction theory and instability criterion and display the utility of the nonreflecting boundaries used in ANSYS/LS-DYNA. In addition, with some examples of actual slope engineering analyzing, the results that show the proposed method is feasible in slope stability analysis. This paper provides an available method for future studies of slope stability during earthquakes.

关 键 词：边坡 强度折减 地震输入 失稳判据 地基辐射阻尼 

分 类 号：TV313[水利工程—水工结构工程]