山东农业大学学报（自然科学版）2018，Vol.49Issue(2)：192-198,7.DOI:10.3969/j.issn.1000-2324.2018.02.003
土石坝心墙裂缝发展的扩展有限元模拟
The XFEM on Clay Crack Extension in Core Wall of Earth Rockfill Dam
摘要
Abstract
There remains a controversial view on development mechanism of hydraulic fracture in earth rockfill dam due to its complexity. Both total stress method and effective stress method cannot calculate crack extension process. In order to study the development mechanism of hydraulic fracture further,a pore extension model and a crack extension model were proposed to describe soil state before and after the appearance of crack. These models were built according to modeling method of damage model of concrete material and crack formation process during hydraulic fracture in earth rockfill dam, combining with mechanical characteristics of unsaturated soil. Crack extension process was simulated numerically by extended finite element method (XFEM). Finally, the feasibility of this method was verified through a simple numerical example.This method has a certain reference value for numerical study of hydraulic fracture.关键词
扩展有限元/裂缝扩展模型/土石坝/水力劈裂/数值模拟Key words
Extended finite element method (XFEM)/crack extension model/earth rockfill dam/hydraulic fracture/numerical simulation分类
建筑与水利引用本文复制引用
赵晓龙,卞汉兵,郑威,孙兆辉,章赛泽,邱秀梅..土石坝心墙裂缝发展的扩展有限元模拟[J].山东农业大学学报（自然科学版）,2018,49(2):192-198,7.基金项目
山东省重点研发计划(2017GSF16104) （2017GSF16104）
中央高校基本科研业务费专项资助项目(2017B651X14) （2017B651X14）
江苏省研究生科研与实践创新计划资助项目(KYCX17_0475) （KYCX17_0475）
