摘要
为研究碱矿渣混凝土(AASC)材料的动态压缩性能及损伤破坏机理,以应变率(39 s^(-1)、57 s^(-1)、75 s^(-1))为变量,开展了动态压缩性能试验;并对试验结果进行分析,获得三种应变率条件下该材料的应力-应变关系曲线。曲线分析显示其峰值应力和应变均随应变率的提高而增大,表明AASC属于应变率敏感材料。采用HJC本构模型开展动态压缩数值模拟,结果显示应力-应变关系曲线数值模拟结果与试验结果较为吻合,其累积损伤破坏过程是由中心向外围逐渐破坏。
Dynamic compressive experimental was carried out by changing the strain rate(39 s-1,57 s-1,75 s-1)to investigate the dynamic compressive properties and damage mechanism of alkali activated slag concrete(AASC).Getting the stress-strain curves of AASC under the different strain rates,the curve analysis results show that the peak stress and peak strain increase with the increase of strain rate,indicates the AASC is a strain rate sensitive material.Numerical simulation was done with the HJC constitutive model,result shows the stress-strain curve of numerical simulation and experimental were simulated.And the damage mechanism of AASC is beginning in the center and accordingly outward.
作者
袁晓辉
李永强
张昊
王士革
YUAN Xiao-hui;LI Yong-qiang;ZHANG Hao;WANG Shi-ge(College of Architecture and Civil Engineering,Xinyang Normal University,Xinyang 464000,China)
出处
《科学技术与工程》
北大核心
2018年第10期130-135,共6页
Science Technology and Engineering
基金
河南省高等学校重点科研项目(17A560009
18A560020)
河南省科技攻关项目(182102310878)资助
关键词
碱矿渣混凝土
应变率
HJC本构模型
数值模拟
alkali activated slag concrete
strain rate
HJC constitutive model
numerical simulation