Fluid solid coupling model based on endochronic damage for roller compacted concrete dam  

作　　者：顾冲时 魏博文 徐镇凯 刘大文 

机构地区：[1]College of Water-Conservancy and Hydropower,Hohai University [2]College of Civil Engineering and Architecture,Nanchang University

出　　处：《Journal of Central South University》2013年第11期3247-3255,共9页中南大学学报（英文版）

基　　金：Projects(51139001,51179066,51079046,50909041) supported by the National Natural Science Foundation of China;Project(NCET-10-0359) supported by the Program for New Century Excellent Talents in University;Projects(2009586012,2009586912,2010585212)supported by the Special Fund of State Key Laboratory of China

摘　　要：According to the characteristics of thin-layer rolling and pouting construction technology and the complicated mechanical behavior of the roller compacted concrete dam （RCCD） construction interface, a constitutive model of endochronic damage was established based on the endochronic theory and damage mechanics. The proposed model abandons the traditional concept of elastic-plastic yield surface and can better reflect the real behavior of rolled control concrete. Basic equations were proposed for the fluid-solid coupling analysis, and the relationships among the corresponding key physical parameters were also put forward. One three-dimensional finite element method （FEM） program was obtained by studying the FEM type of the seepage-stress coupling intersection of the RCCD. The method was applied to an actual project, and the results show that the fluid-solid interaction influences dam deformation and dam abutment stability, which is in accordance with practice. Therefore, this model provides a new method for revealing the mechanical behavior of RCCD under the coupling field.According to the characteristics of thin-layer rolling and pouring construction technology and the complicated mechanical behavior of the roller compacted concrete dam(RCCD)construction interface,a constitutive model of endochronic damage was established based on the endochronic theory and damage mechanics.The proposed model abandons the traditional concept of elastic-plastic yield surface and can better reflect the real behavior of rolled control concrete.Basic equations were proposed for the fluid solid coupling analysis,and the relationships among the corresponding key physical parameters were also put forward.One three-dimensional finite element method(FEM)program was obtained by studying the FEM type of the seepage-stress coupling intersection of the RCCD.The method was applied to an actual project,and the results show that the fluid solid interaction influences dam deformation and dam abutment stability,which is in accordance with practice.Therefore,this model provides a new method for revealing the mechanical behavior of RCCD under the coupling field.

关 键 词：roller compacted concrete dam endochronic damage fluid-solid coupling analytical model 

分 类 号：TV642.2[水利工程—水利水电工程] TV31