Heterogeneous fracture simulation of three-point bending plain-concrete beam with double notches

被引：0

作者：

Chuanchuan Zhang

Xinhua Yang

Hu Gao

Hongping Zhu

机构：

[1] Huazhong University of Science and Technology,School of Civil Engineering and Mechanics

[2] Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment,undefined

来源：

Acta Mechanica Solida Sinica | 2016年 / 29卷

关键词：

concrete beam; double notches; three-point bending fracture; cohesive zone model;

D O I：

暂无

中图分类号：

学科分类号：

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.

引用

页码：232 / 244

页数：12