摘要
对高温后再生混凝土圆柱体试件(Ф100×200mm)进行了常规三轴加载试验,获得了高温后再生混凝土应力-应变全过程曲线,拟合了高温后再生混凝土三轴受压本构方程.结果表明:在单向应力下,高温后再生混凝土应力-应变全过程曲线有比较明显的尖峰.随着侧向围压的增加,高温后再生混凝土应力-应变全过程曲线逐渐变得平缓和丰满.高温后再生混凝土三轴受压本构关系曲线变化趋势与普通混凝土类似.所拟合出的高温后再生混凝土三轴受压本构方程能较好拟合试验结果.
Cylindrical recycled concrete specimens with the size of Ф 100×200mm after high temperature were designed to conducted conventional triaxial load test,based on which the complete stress-strain curves were acquired.The constitutive equation of recycled concrete under triaxial compression after high temperature was proposed.The results show that under uniaxial stress,the complete stress-strain curve of recycled concrete has obvious spike,and with the increase of lateral confining pressure,the curve becomes smooth and plump.The change trend of constitutive relation curve of recycled concrete under triaxial compression after high temperature is similar to the normal concrete.The fitting constitutive equation of recycled concrete under triaxial compression after high temperature agrees well with the experimental results.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2015年第6期946-952,共7页
Journal of Building Materials
基金
国家自然科学基金资助项目(51468003)
高等学校博士学科点专项科研基金联合资助项目(20134501110001)
广西科学研究与技术开发项目(桂科转14124005-1-2)
关键词
再生混凝土
本构关系
三轴受压
应力-应变全过程曲线
高温
recycled concrete
constitutive relation
triaxial compression
complete stress-strain curve
high temperature
