基于广义塑性模型的高面板堆石坝应力变形数值模拟  

Numerical Simulation of High Face Rockfill Dam Based on Generalized Plastic Model

作　　者：董国庆[1] 何亮[2] DONG Guoqing;HE Liang(Chengxian College of Southeast University, Nanjing 210088, China;Changzhou Institute of Technology, Changzhou 213032, China)

机构地区：[1]东南大学成贤学院,江苏南京210088 [2]常州工学院,江苏常州213032

出　　处：《人民黄河》2019年第5期114-116,121,共4页Yellow River

基　　金：水利部土石坝破坏机理与防控技术重点实验室开放基金项目(YK319009);常州工学院重点科研基金项目(YN1709)

摘　　要：基于大型静力三轴压缩试验、等向压缩和卸载试验,构造了简捷的塑性模量表达式,建立了适用于堆石料的广义塑性本构模型。堆石料的本构模型模拟和三轴压缩试验的对比结果表明:广义塑性模型不仅能反映堆石料在低围压下的剪胀性和高围压下的剪缩性,而且能反映堆石料因颗粒破碎而引起峰值应力比和剪胀应力比的非线性变化特性。此外,有限元静力计算结果表明,坝体水平位移和沉降特性均符合高面板堆石坝的一般变形规律,量值在合理范围内。Based on the results of large-scale static triaxial compression test, isotropic compression and unloading test, a concise expression of plastic modulus was constructed and a generalized plastic constitutive model for rockfill material was established. The results of constitutive model simulation and triaxial compression test show that the generalized plastic model can not only reflect the dilatancy of rockfill under low confining pressure and high confining pressure, but also reflect the non-linear characteristics of peak stress ratio and dilatancy stress ratio caused by particle breakage. In addition, the finite element static calculation results show that the horizontal displacement and settlement characteristics of the dam body conform to the general law of high face rockfill dam, and the value is within a reasonable range.

关 键 词：堆石料 广义塑性模型 塑性模量 有限元分析 

分 类 号：TV641.4[水利工程—水利水电工程] TU47[建筑科学—结构工程]