基于损伤理论的体外预应力混凝土梁挠度分析

ANALYSIS THE DEFLECTION OF EXTERNAL PRE-STRESSED CONCRETE BEAM BASED ON DAMAGE THEORY

用损伤本构方程取代没有考虑损伤的本构方程,采用自编的空间八节点等参申元附加荷载有限元程序对一体外预应力混凝土梁受力变形进行了分析。结果表明:损伤理论可以较好的反映混凝土材料在加载过程中的复杂行为,获得了和试验较一致的结果,为研究混凝土材料非线性行为提供了一种新途径。

This paper replaces constitutive equations without considering damage by constitutive equations considering damage, analysis the deformation of pre - stressed concrete beam using finite element method program of spatial 8 - node isoparametric element on additional load. The conclusion shows that the damage theory can preferably reflect the complicated behaviors of concrete in the loading process. The result of computing is according to the result of test. This paper provides a new way to study the nonlinear behavior of concrete material.