An Elastoplastic Damage Constitutive Model for Concrete  

作　　者：刘军 林皋 钟红 

机构地区：[1]School of Civil&Safety Engineering,Dalian Jiaotong University [2]Faculty of Infrastructure Engineering,Dalian University of Technology

出　　处：《China Ocean Engineering》2013年第2期169-182,共14页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.90510018);the Education Department of Liaoning Province(Grant No.2006T019)

摘　　要：An elastoplastic damage constitutive model to simulate nonlinear behavior of concrete is presented. Similar to traditional plastic theory, the irreversible deformation is modeled in effective stress space. In order to better describe different stiffness degradation mechanisms of concrete under tensile and compressive loading conditions, two damage variables, i.e., tension and compression are introduced, to quantitatively evaluate the degree of deterioration of concrete structure. The rate dependent behavior is taken into account, and this model is derived firmly in the framework of irreversible thermodynamics. Fully implicit backward-Euler algorithm is suggested to perform constitutive integration. Numerical results of the model accord well with the test results for specimens under uniaxial tension and compression, biaxial loading and triaxial loading. Failure processes of double-edge-notched （DEN） specimen are also simulated to further validate the proposed model.An elastoplastic damage constitutive model to simulate nonlinear behavior of concrete is presented. Similar to traditional plastic theory, the irreversible deformation is modeled in effective stress space. In order to better describe different stiffness degradation mechanisms of concrete under tensile and compressive loading conditions, two damage variables, i.e., tension and compression are introduced, to quantitatively evaluate the degree of deterioration of concrete structure. The rate dependent behavior is taken into account, and this model is derived firmly in the framework of irreversible thermodynamics. Fully implicit backward-Euler algorithm is suggested to perform constitutive integration. Numerical results of the model accord well with the test results for specimens under uniaxial tension and compression, biaxial loading and triaxial loading. Failure processes of double-edge-notched （DEN） specimen are also simulated to further validate the proposed model.

关 键 词：constitutive model elastoplastic-damage irreversible thermodynamics energy release rate CONCRETE 

分 类 号：TU528[建筑科学—建筑技术科学]