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

ISSN号：2095-2899
期刊名称：Journal of Central South University
时间：2013.11.11
页码：3247-3255
分类：TU452[建筑科学—岩土工程;建筑科学—土工工程] TV642.2[水利工程—水利水电工程]
作者机构：[1]College of Water-Conservancy and Hydropower, Hohai University, Nanjing 210098, China, [2]College of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China
相关基金：Proj ects（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
相关项目：碾压混凝土坝渐变力学特性与安全监控方法研究

作者： Gu ChongShi|Wei Bowen|Xu Zhenkai|Liu DaWen|

关键词：碾压混凝土坝, 流固耦合模型, 损伤本构模型, 内时理论, 三维有限元法, 力学行为, 流固耦合分析, 渗流应力耦合, roller compacted concrete dam, endochronic damage, fluid-solid coupling, analytical model

中文摘要：

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.

英文摘要：

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.