适用于型钢混凝土结构的HSHPC损伤本构关系的模拟

Simulation of damage constitutive law of HSHPC applied to SRC structure

通过大量的高强高性能混凝土力学性能和损伤检测试验,得到了高强高性能混凝土的损伤演化规律;基于试验所得的损伤演化规律,引入一种新的双参数损伤变量以描述高强高性能混凝土的损伤演化,进而建立其损伤本构关系,利用边界条件确定损伤本构方程。通过理论计算结果与大量高强高性能混凝土力学试验结果对比,表明该损伤本构方程能合理地反映高强高性能混凝土损伤特性,为进一步研究高强高性能混凝土的动力随机损伤本构关系鉴定了一定的理论基础。

The damage evolution laws of high-strength and high-performance concrete （HSHPC）are obtained from a large number of experi-ments about its mechanical properties and damage detection tests.Based on the damage evolution laws,a new damage variable with two parame-ters is proposed to describe the damage evolution which is used to establish the constitutive relation of HSHPC.The damage constitutive equation is established on boundary conditions.Through comparisons of theoretical calculations and a large number of mechanical test results of HSHPC, this shows that the damage constitutive equation can reasonably reflect the damage characteristics of HSHPC.Research identifies a certain theoreti-cal basis for further studying the dynamic and stochastic damage constitutive relation of HSHPC.