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论文类型：期刊论文

发表时间：2022-06-30

发表刊物：水利学报

卷号：41

期号：5

页面范围：567-574

ISSN号：0559-9350

摘要：Based on the theory of energy equivalent and the concept of effective
   stress in damage mechanics the rate-dependent elastoplastic
   damage-failure model with multiaxial effect taken into account is
   proposed. The validity of the model is verified by the numerical
   simulation of a concrete stub which is experimentally studied by
   Tikhomirov and Stein in 2001.On this basis, the model is applied to
   numerical simulation of high arch dam subjected to designed strong
   earthquake, with maximum acceleration 0.5575gm/s~(-2), by using the FEM
   method. Not only the tensile and compressive damage but also the global
   damage pattern and strain rate response in the whole process of
   earthquake are obtained. It is found that the tensile damage is the
   primary cause of dam failure. The strain rate response which
   significantly affects the dynamic characteristics of concrete varies in
   different zone of the dam. The global damage situation indicates that
   the dam has sufficient safety in resisting the designed strong
   earthquake. The failure procedure of the simulation result is in good
   agreement with that of model test

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