ZHANG Li, ZHAO Lan-hao, LIU Zhi, MAO Jia. AN ELASTIC-PLASTIC DAMAGE CONSTITUTIVE MODEL OF CONCRETE UNDER CYCLIC LOADING AND ITS NUMERICAL IMPLEMENTATION[J]. Engineering Mechanics, 2023, 40(4): 152-161. DOI: 10.6052/j.issn.1000-4750.2021.10.0786
Citation: ZHANG Li, ZHAO Lan-hao, LIU Zhi, MAO Jia. AN ELASTIC-PLASTIC DAMAGE CONSTITUTIVE MODEL OF CONCRETE UNDER CYCLIC LOADING AND ITS NUMERICAL IMPLEMENTATION[J]. Engineering Mechanics, 2023, 40(4): 152-161. DOI: 10.6052/j.issn.1000-4750.2021.10.0786

AN ELASTIC-PLASTIC DAMAGE CONSTITUTIVE MODEL OF CONCRETE UNDER CYCLIC LOADING AND ITS NUMERICAL IMPLEMENTATION

  • An elastic-plastic damage model describing the complex mechanical behavior of concrete under cyclic loading is established. The model uses the four-parameter equivalent strain to convert the complex multi-axis problem into the uniaxial equivalent strain space, and considers the stiffness degradation and irreversible deformation during concrete unloading. In view of the non-negative characteristics of equivalent strain, a tension-compression conversion processing method is proposed, so that distinguishing between tension and compression damage is no longer necessary when solving damage variables, and the mathematical form of the model is concise as a result. Meanwhile, the realization process does not depend on the four-parameter model, and the realization method is applicable to various concrete equivalent strain models. By simulating the uniaxial cyclic load test and the dynamic damage process of the Koyna dam, the correctness and reliability of the model in this paper are verified.
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