Damage constitutive model of different age concretes under impact load  

作　　者：李夕兵 王世鸣 翁磊 黄麟淇 周韬 周健 

机构地区：[1]School of Resources and Safety Engineering, Central South University [2]Hunan Key Lab of Resources Exploitation and Hazard Control for Deep Metal Mines

出　　处：《Journal of Central South University》2015年第2期693-700,共8页中南大学学报（英文版）

基　　金：Project(2010CB732004)supported by National Basic Research Program of China;Project(50934006)supported by the National Natural Science Foundation of China

摘　　要：In order to investigate the mechanical properties and stress-strain curves of concrete at different ages under impact load,the impact compression tests of concrete at age of 1, 3, 7, 14 and 28 d were conducted with a large diameter split Hopkinson pressure bar, respectively. Based on statistical damage theory and Weibull distribution, combining the analysis of the change laws of stressstrain curves and viscosity coefficient of concrete with age, a damage constitutive model that can reflect the variation in dynamic mechanical properties with age was proposed. The stress-strain curves calculated from the proposed model are in good agreement with those from experimental data directly.In order to investigate the mechanical properties and stress-strain curves of concrete at different ages under impact load,the impact compression tests of concrete at age of 1, 3, 7, 14 and 28 d were conducted with a large diameter split Hopkinson pressure bar, respectively. Based on statistical damage theory and Weibull distribution, combining the analysis of the change laws of stressstrain curves and viscosity coefficient of concrete with age, a damage constitutive model that can reflect the variation in dynamic mechanical properties with age was proposed. The stress-strain curves calculated from the proposed model are in good agreement with those from experimental data directly.

关 键 词：CONCRETE constitutive model age split Hopkinson pressure bar 

分 类 号：TU528[建筑科学—建筑技术科学]