高强度混凝土的细观损伤本构模型研究

基于轴向拉伸与压缩试验观测资料，论述了高强度混凝土的细观损伤机理和以应力与应变全曲线及其特征点相对应参数建立的损伤本构模型，提出了拉、压二向应力状态时的本构模型和正交异性损伤本构模型，同时还引入其他学者提出的混凝土三向应力状态各向同性损伤时的本构模型，并提出了高强度混凝土的损伤断裂判据

Research of Microcosmic Injury Constitutive Model of High Strength Concrete

Based on experimental observation data,this paper analyzes the basic reasons of microcosmic injury of high strength concrete,and based on the stress and strain diagram and its characteristic point of experiments on tension and compression,sets up high strength concrete constitutive injury model in one directional tension and compression,presents the coupling model of two directional tension and compression injury,and the constitutive model of high strength concrete perpendicular injury of different characters.In addition,this paper introduces other scholars' injury constitutive model of concrete injury in three directional stress state and of the same character in all directions,and presents injury damage criterion of high strength concrete.Based on the foundation of injury theory,it sets up a stress and strain field and injury nonlinear finite element calculation method at the time of concrete injury damage.