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

被引：28
|
作者：
Zhang, Chuanchuan [1 ]
Yang, Xinhua [1 ,2 ]
Gao, Hu [1 ]
Zhu, Hongping [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Civil Engn & Mech, Wuhan 430074, Peoples R China
[2] Hubei Key Lab Engn Struct Anal & Safety Assessmen, 1037 Luoyu Rd, Wuhan 430074, Peoples R China
来源：
ACTA MECHANICA SOLIDA SINICA | 2016年 / 29卷 / 03期
关键词：
concrete beam; double notches; three-point bending fracture; cohesive zone model; ASPHALT MIXTURE BEAM; MECHANICAL-PROPERTIES; NUMERICAL-SIMULATION; CRACK-PROPAGATION; IMAGE CORRELATION; SPECIMEN SIZE; MODEL; ENERGY; BEHAVIOR; FAILURE;
D O I：
10.1016/S0894-9166(16)30158-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
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
收藏
页码：232 / 244
页数：13
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