混凝土的两种损伤模型及其应用

Two Concrete Damage Models and Their Application

本文首先用损伤力学的理论和实验相结合的方法,提出了两种描述混凝土损伤演变的模型——分段曲线模型和双线性模型.算例表明,利用这两种模型均能较好地描述混凝土的损伤特性.本文又将分段曲线模型推广到考虑温度影响的问题.并利用此模型用有限元方法计算和分析了柘溪单支墩大头坝表面裂缝的形成,计算结果和大头坝实际情况基本相符.

Combining the theory of damage mechanics with experiments,two damage model—bicurvlinear model and bilinear model are proposed. Calculations of typical examples show that the behaviour of concrete can be well described by these two models.Then the bicurvlinear model is extended to the problems which take the temperature effect into account and the surface crack forming in Zhexi diamond head buttress dam is calculated using this model and the finite element method.The results of calculation basically agree wi...