大体积混凝土结构的损伤仿真有限元方程

Three dimensional finite element equation of damage simulation of large concrete structures

温度、自重、荷载和基础约束等因素都将导致混凝土材料产生损伤,即材料性能劣化,因而混凝土结构是一个随时间变化的损伤场。因此,对大体积混凝土结构的损伤仿真分析非常必要,该文推导了混凝土结构三维损伤有限元方程,为混凝土结构的三维损伤仿真有限元计算奠定了基础,计算结果更加符合实际。

The concrete construction is a damage field varying with time for the temperature, gravity, load and the base constraint can result in the damage of the concrete material,so it is necessary to carry out the damage simulation of concrete structures,especially the large complex concrete structures.In the paper,the 3D finite element equation of damage simulation of concrete structures is deduced based on the introduction of the damage variable and the calculation principle of the stress field. A calculation example of an arch dam is presented,and the result is much more in agreement with the reality.This study provides a basis for the 3D damage simulation of concrete structures.