基于ABAQUS的SBFEM及在混凝土坝非线性地震响应分析中的应用  

ABAQUS-Based Scaled Boundary Finite Element Method and its Application to Nonlinear Seismic Response Analysis of Concrete Dams

作　　者：陈灯红[1,2] 刘云龙 林天成 潘子悦 CHEN Denghong;LIU Yunlong;LIN Tiancheng;PAN Ziyue(Hubei Key Laboratory of Disaster Prevention&Mitigation,China Three Gorges Univ.,Yichang 443002,China;College of Civil Engineering&Architecture,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]防灾减灾湖北省重点实验室(三峡大学),湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2023年第5期50-58,共9页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(52079072)。

摘　　要：通过用户子程序接口,将比例边界有限元法嵌入到商用程序ABAQUS中.采用蒙皮单元技术完成了接触界面属性定义,将比例边界有限元法与ABAQUS中的接触非线性模型相结合.通过耦合比例边界有限元法-经典有限元法,采用黏弹性边界建立了考虑横缝接触非线性的坝体-库水-地基动力相互作用模型.将接触非线性混凝土坝模型应用到NG5拱坝中,计算结果均与ABAQUS自带单元的结果吻合良好,并具有较高的计算效率,从而为工程结构动力分析提供了一种新手段.The scaled boundary finite element(SBFEM)method is embedded into the commercial program ABAQUS through the user subroutine interface.The contact interface attributes are defined by overlaying element technique,and the scaled boundary finite element method is combined with the contact nonlinear model in ABAQUS.By using the coupled scaled boundary finite element method and classical finite element method(FEM),the dynamic interaction model of dam-reservoir water-foundation considering the contact nonlinearity of transverse joints is established.When the contact nonlinear concrete dam model is applied to NG5 arch dam,the calculated results are in good agreement with those of ABAQUS and have high computational efficiency,which provides a new method for the dynamic analysis of engineering structures.

关 键 词：比例边界有限元法 混凝土坝 接触非线性 蒙皮单元技术 

分 类 号：TV642.4[水利工程—水利水电工程]