Fluid-solid coupling model based on endochronic damage for roller compacted concrete dam
来源期刊：中南大学学报(英文版)2013年第11期
论文作者：GU Chong-shi(顾冲时) WEI Bo-wen(魏博文) XU Zhen-kai(徐镇凯) LIU Da-wen(刘大文)
文章页码：3247 - 3255
Key words：roller compacted concrete dam; endochronic damage; fluid-solid coupling; analytical model
Abstract: 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.
GU Chong-shi(顾冲时)1, WEI Bo-wen(魏博文)1, 2, XU Zhen-kai(徐镇凯)2, LIU Da-wen(刘大文)1
(1. College of Water-Conservancy and Hydropower, Hohai University, Nanjing 210098, China;
2. College of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China)
Abstract: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.
Key words:roller compacted concrete dam; endochronic damage; fluid-solid coupling; analytical model
