个人信息Personal Information
副研究员
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:水利工程系
学科:水工结构工程
电子邮箱:zhouy@dlut.edu.cn
Linear elastic and plastic-damage analyses of a concrete cut-off wall constructed in deep overburden
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论文类型:期刊论文
发表时间:2015-09-01
发表刊物:COMPUTERS AND GEOTECHNICS
收录刊物:SCIE、EI、Scopus
卷号:69
期号:69
页面范围:462-473
ISSN号:0266-352X
关键字:Asphalt concrete core dam; Deep overburden; Concrete cut-off wall; Plastic-damage model; Damage degree
摘要:Asphalt concrete core dams (ACCDs) are becoming more widely used worldwide. ACCDs with concrete cut-off walls (for controlling foundation seepage) have been constructed in deep overburden. It is important to assess dam safety by analysing the stress and deformation behaviour of the concrete cut-off wall. In this study, a 3D finite element (FE) procedure was developed to simulate the dam construction and water impounding processes of an ACCD. Rockfill/gravel materials were described using a DuncanChang model, and the interface between the concrete cut-off wall and the foundation gravel was modelled using interfacial elements that follow a tangential hyperbolic stress-strain model. The linear elastic and plastic-damage models were employed to model the concrete cut-off wall. The stress-deformation behaviour and the damage distribution of the concrete cut-off wall were numerically simulated and analysed. The results indicate that the plastic-damage model was more reliable than the elastic model in describing the mechanical behaviour of the concrete cut-off wall. The plastic-damage model can be used to evaluate the safety of concrete cut-off walls constructed in deep overburden. (C) 2015 Elsevier Ltd. All rights reserved.