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THE USE OF VISCO-ELASTOPLASTIC DAMAGE CONSTITUTIVE MODEL TO SIMULATE NONLINEAR BEHAVIOR OF CONCRETE
Authors:Jun Liu Gao Lin Bing Fu Hong Zhong
Institution:[1]State Key Laboratory, of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China [2]Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Abstract:A visco-elastoplastic damage constitutive model is proposed for simulating nonlinear behavior of concrete. Based on traditional plastic theory, the irreversible deformation is simulated in effective stress space. In order to reflect different stiffness degradation mechanism of concrete under tensile and compressive loading conditions, both tensile and compressive damage variables are introduced, and then on the basis of energy release rate, the model is firmly derived within the concept of irreversible ther...
Keywords:damage  rate-dependent plasticity  thermodynamics  energy release rate  nonlinear behavior  concrete  
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