【摘要】 ABAQUS软件是目前国际上功能最强大的非线性有限元软件之一。该软件包括了众多材料本构模型,但尚缺少国内外土石坝动力分析中广泛采用的等效线性化本构模型。本文在ABAQUS软件上实现了土的动力等效线性化模型和土石坝地震永久变形计算,并通过一个典型算例进行了验证;在此基础上,对一座拟建中的高混凝土面板堆石坝进行了地震响应分析,重点分析大坝的绝对加速度、动位移和残余变形等动力反应情况。结果表明,坝体在地震作用下的响应不强烈,但坝顶出现明显的鞭稍效应,需采取相应的抗震工程措施。更多还原

【Abstract】 ABAQUS that integrates various material models is a powerful code of nonlinear finite element analysis.The current release of this code,however,has no equivalent linear model that is widely used in geotechnical engineering for deformation simulation.This paper presents a technique of adopting such a model in the frame of ABAQUS.A 3D nonlinear FEM method was used to analyze dynamic responses of a high concrete-faced rockfill dam(CFRD),focusing on distributions of absolute acceleration,dynamic displacement,dynamic stress,permanent deformation.Results show that under the design earthquake conditions,the overall response is weak,while the response at the dam top is strong.Thus certain measures should be taken to ensure stability of the dam.更多还原