Damage constitutive model of different age concretes under impact load
来源期刊：中南大学学报(英文版)2015年第2期
论文作者：LI Xi-bing(李夕兵) 王世鸣 WENG Lei(翁磊) 黄麟淇 ZHOU Tao(周韬) ZHOU Jian(周健)
文章页码：693 - 700
Key words：concrete; constitutive model; age; split Hopkinson pressure bar
Abstract: 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 stress- strain 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.
LI Xi-bing(李夕兵)1, 2, WANG Shi-ming(王世鸣)1, WENG Lei(翁磊)1, HUANG Lin-qi(黄麟淇)1, ZHOU Tao(周韬)1, ZHOU Jian(周健)1
(1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
2. Hunan Key Lab of Resources Exploitation and Hazard Control for Deep Metal Mines, Changsha 410083, China)
Abstract: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 stress- strain 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.
Key words:concrete; constitutive model; age; split Hopkinson pressure bar
