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论文类型：期刊论文
发表时间：2012-06-01
发表刊物：INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
收录刊物：SCIE、EI、Scopus
卷号：8
期号：2
页面范围：113-120
ISSN号：1569-1713
关键字：Concrete; EFG; Multi-scale constitutive relation; Damage; Cracks; Hysteresis
摘要：In this paper, a new multi-scale numerical model is presented using meshless element free Galerkin (EFG) method to simulate the multi-scale constitutive relation of concrete. The scale separation is based on the decomposition of the mesh free shape function into alpha and beta scales, similar decomposition is also adopted for the constitutive equations. And the constitutive relations in different scales for concrete are established. The multi-scale EFG model is utilized for discretization of components of concrete block, which are aggregate, cement and transition region. The strengths of these components are adopted according to Weibull distribution. Consequently, the multi-scale EFG model is applied to describe the evolutionary processes of damage, the propagation of cracks and the characteristics of hysteresis of concrete. The plain static analysis of concrete block is performed by using this model and the calculated result is discussed.