Yunfa Zhang1, Xiaozhou Xia1, *, Zhenjie Wu1, Qing Zhang1
CMC-Computers, Materials & Continua, Vol.62, No.1, pp. 413-442, 2020, DOI:10.32604/cmc.2020.04660
Abstract Considering the fact that the initial defects, like the imperfect interfacial
transition zones (ITZ) and the micro voids in mortar matrix, weaken the mechanical
properties of concrete, this study develops corresponding constitutive models for ITZ and
matrix, and simulates the concrete failure with finite element methods. Specifically, an
elastic-damage traction-separation model for ITZ is constructed, and an anisotropic
plastic-damage model distinguishing the strength-difference under tension and
compression for mortar matrix is proposed as well. In this anisotropic plastic-damage
model, the weakening effect of micro voids is reflected by introducing initial isotropic
damage, the distinct characteristic of tension and compression which… More >
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