关键词: 数值试验, 混凝土裂纹, 变形, 破坏, MFPA2D系统, 偏心加载

Abstract: A numerical code MFPA (Material Failure Process Analysis) is used to model the crack initiation and propagation in reinforced concrete bridge pier, which are subjected to eccentric loading. Mathematically, the MFPA code is a linear finite element method (FEM) also a continuum mechanics method for numerically processing non-linear and discontinuum problems. Reinforced concrete structures are generally designed to allow cracking under service loading. Therefore, accurate modeling is important. The reinforced concrete here is expressed by a set of elements which are of the same size but different mechanically so as to reflect its heterogeneous mechanical properties. Load-displacement curve, elastic modulus and principal stress photos are provided to simulate the failure process, and an analysis is made for the failure process. The simulation results showed that tensile stress causes the failure, which is similar to the experimental result as showed by some literatures as references.