混凝土破坏的断裂与损伤耦合分析

目的 应用断裂力学与损伤力学耦合分析方法分析混凝土破坏的问题．方法 以三点弯曲混凝土梁为例，应用断裂力学与损伤力学耦合分析方法从理论上确定初始损伤区与断裂区，然后用损伤力学的方法、数值模拟混凝土梁的破坏过程．结果 确定了三点弯曲混凝土梁的损伤区和断裂区尺寸，应用西多霍夫损伤模型和断裂力学的耦合分析方法数值模拟了混凝土三点弯曲梁的破坏过程，发现裂纹是带着损伤区向前扩展的．结论 笔者提出的方法是合理的便于工程应用的模拟混凝土裂纹扩展过程的方法。

Coupling Analysis of Fracture and Damage Mechanics of Concrete Failure

This paper analyzes the failure process of concrete by applying approach of Coupling Analysis of Fracture Mechanics and Damage Mechanics(CAFMDM).Taking a three-point bending beam as an example,the initial damage and fracture zones were determined by the approach of CAFMDM.Failure process of the three-point bending beam was simulated using Sidoroff damage model.It was found that the crack propagates with the damage zone.From the result of this paper,we can see that the approach presented in this paper is reasonable and convenient in engineering application for stimulating propagation of cracks in concrete.