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论文类型：期刊论文

发表时间：2010-04-01

发表刊物：ACTA MECHANICA SOLIDA SINICA

收录刊物：Scopus、EI、SCIE

卷号：23

期号：2

页面范围：147-155

ISSN号：0894-9166

关键字：constitutive model; viscoplasticity; consistency model; energy dissipation; rate dependency; concrete; backward Euler scheme

摘要：An energy-dissipation based viscoplastic consistency model is presented to describe the performance of concrete under dynamic loading. The development of plasticity is started with the thermodynamic hypotheses in order that the model may have a sound theoretical background. Independent hardening and softening and the rate dependence of concrete are described separately for tension and compression. A modified implicit backward Euler integration scheme is adopted for the numerical computation. Static and dynamic behavior of the material is illustrated with certain numerical examples at material point level and structural level, and compared with existing experimental data. Results validate the effectiveness of the model.