同济大学学报（自然科学版）2024，Vol.52Issue(8)：1278-1285,8.DOI:10.11908/j.issn.0253-374x.22462
两类混凝土动力黏损伤本构模型比较研究
Comparative Studies of Two Types of Viscous Damage Models for Concrete Under Dynamic Loading
摘要
Abstract
In order to reflect the rate dependence of mechanical behavior under dynamic loading,based on the elastoplastic damage theory framework,the dynamic damage evolution is expanded from the static model.The damage evolution is delayed due to the rate effect,which leads to the strengthening phenomena.Inspired by the viscoplastic theory,two types of dynamic visco-damage evolution models are established in the damage subspace:Perzyna model and Duvaut-Lions model.The constitutive theories and the numerical results of the two kinds of viscous damage evolution models are compared respectively.In terms of constitutive theory,the two models have different viscous variables.In the simulation results,concrete dynamic behaviors simulated by the linear visco-damage models with Perzyna format and Duvaut-Lions format are nearly consistent.In contrast,those calculated by the nonlinear visco-damage models with Perzyna format and Duvaut-Lions format differ.In addition,the improvement in dynamic strength predicted by both nonlinear models agrees well with test data,indicating that both can reflect the rate sensitivity of concrete material.关键词
混凝土/动力本构/率效应/黏损伤演化Key words
concrete material/dynamic constitutive relationship/rate effect/visco-damage evolution分类
建筑与水利引用本文复制引用
魏晓丽,任晓丹..两类混凝土动力黏损伤本构模型比较研究[J].同济大学学报（自然科学版）,2024,52(8):1278-1285,8.基金项目
国家自然科学基金面上项目(52078361) （52078361）
上海市教育委员会科研创新计划(2017-01-07-11-07-E00006) （2017-01-07-11-07-E00006）
