基于质点平衡法的混凝土三点弯曲梁破坏过程模拟

Simulation of Cracking Process of Three-point Bending Concrete Beam Based on Particle Equilibrium Method

针对现有混凝土破坏过程模拟方法存在的不足,将质点平衡法应用于混凝土三点弯曲梁的开裂特性模拟。结果表明,结构自身的应力分布决定裂缝的分布区域,而混凝土内部各组分的力学性能直接决定裂缝细部扩展路径,质点平衡法适合模拟考虑细观结构的混凝土结构的开裂特性。研究成果可为混凝土细观力学特性的研究提供参考。

With respect to the deficiency of the existing method for simulating the failure process in concrete,particle equilibrium method(PEM)is used to study the cracking characteristics of concrete three-point bending beam.The results show that the stress distribution of the structure directly determines the distribution domain of the crack,and the mechanical properties of various components in concrete directly determine the crack propagation path.The PEM is appropriate for simulating the cracking characteristics of concrete structure in consideration of microstructure.The research can provide a reference for the study of concrete micro mechanical properties.