Heterogeneous Fracture Simulation of Three-point Bending Plain-concrete Beam with Double Notches

查看全文 作　　者：Chuanchuan [1]Zhang;Xinhua [1,2]Yang;Hu [1]Gao;Hongping [1]Zhu

机构地区：[1]School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;[2]Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, 1037 Luoyu Road, Wuhan 430074, China

出　　处：《Acta Mechanica Solida Sinica》索引2016年第29卷第3期,共13页

基　　金：Project supported by the National Basic Research Program of China(973 Program:No.2011CB013800);Hubei Provincial Natural Science Foundation of China(No.2015CFB205) 摘　　要：Plain concrete is regarded as a two-phase material comprising randomly distributed aggregates and mortar matrix. A series of three-point bending concrete beams with symmetric or asymmetric double notches are modeled using the modified random aggregate generation and packing algorithm. The cohesive zone model is used as the fracture criterion and the cohesive elements are inserted into both the mortar matrix and the aggregate-mortar interfaces as potential micro-cracking zones. The dead and alive crack phenomena are studied experimentally and numerically; and the influences of notch location, aggregate distribution and gradation on fracture are numerically evaluated. Some important conclusions are given. 关键词：混凝土梁三点弯曲断裂判据缺口模拟异构随机分布数值计算

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Heterogeneous Fracture Simulation of Three-point Bending Plain-concrete Beam with Double Notches

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