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论文类型：期刊论文
发表时间：2013-08-01
发表刊物：ACTA MECHANICA SOLIDA SINICA
收录刊物：SCIE、EI、CSCD
卷号：26
期号：4
页面范围：344-352
ISSN号：0894-9166
关键字：fractal theory; concrete material; fractal box dimension; damage; multi-scale constitutive relation
摘要：A new multi-scale numerical model is presented using the fractal theory and adopting FEM to simulate the failure of concrete. The relation between the fractal box dimension in large scale and the damage to concrete in small scale is deduced. And the evolutionary process of elastic modulus and strength in small scale is given. Consequently, the multi-scale numerical model is proposed to describe the constitutive relation of concrete between small scale and large scale. A two-dimensional static analysis of a concrete block is performed by using this model and the calculation result is discussed. The propagation of cracks of the concrete block is also studied.