基于多种材料模型的混凝土/基岩胶结面现场抗剪试验的数值模拟研究  

The Numerical Simulation Study of the In-situ Shear Strength Test on theConcrete/Bedrock Cementation Plane Based on Multiple Material Models

作　　者：王义鹏 赖国伟[2] 程亮 余巍 朱东 WANG Yi-peng;LAI Guo-wei;CHENG Liang;YU Wei;ZHU Dong(Central South China Electric Power Design Institute, Wuhan 430071, China;State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China)

机构地区：[1]中南电力设计院有限公司,武汉430071 [2]武汉大学水资源与水电工程国家重点实验室,武汉430072

出　　处：《中国农村水利水电》2020年第12期193-200,205,共9页China Rural Water and Hydropower

摘　　要：从混凝土/基岩胶结面现场抗剪试验出发,建立试验的有限元数值模型,分别分析了在节理材料模型、Mohr-Coulomb材料模型、理想弹塑性的损伤塑性模型和考虑软化的损伤塑性模型下混凝土/基岩胶结面的应力、位移及屈服区的分布及发展规律。研究结果表明:①通过不同材料模型计算得出的计算抗剪断强度参数存在一定差异;②通过不同材料模型计算得出的胶结面应力分布规律大致相同,胶结面应力均呈现不均匀分布状态,上下游端部应力集中明显;③通过不同材料模型计算得出的胶结面屈服区发展规律大致相同,随外荷载增加,胶结面屈服区均从上游逐渐向下游发展,直至贯通整个胶结面;④通过平均应力整理出来的抗剪强度是偏保守的。Starting from the in-situ shear strength test on the concrete/bedrock cementation plane,the finite element numerical model of the test is established,and the distribution and development of stress,displacement and failure zone of concrete/bedrock cementation plane are analyzed under JOINT material model,Mohr-Coulomb material model,ideal elastic-plastic damage plastic model and damage plastic model considering softening respectively.The results show that①there are some differences in the calculated shear strength parameters calculated by different material models;②the stress distribution of the cementation calculated by different material models is roughly the same,that the stress on the cementation is unevenly distributed,and the stress concentration at the upstream and downstream ends is obvious;③the development law of the cementation yield area calculated by different material models is roughly the same.As the external load increases,the yield area gradually develops from upstream to downstream until it penetrates the entire cementation;④the shear strength is conservative by the average stress arrangement.

关 键 词：混凝土/基岩胶结面 抗剪强度参数 数值模拟 

分 类 号：TV32[水利工程—水工结构工程]