摘要
为研究超高强螺旋筋约束高强混凝土的轴压性能,以混凝土强度等级、螺旋筋配箍率和螺旋筋屈服强度为变量,对32个圆柱体试件开展轴压试验。结果表明:超高强螺旋筋具有更长的弹性受力阶段,能够有效降低高强混凝土的脆性,并能确保其在受压时实现超过3.00%的塑性变形;超高强(1774 MPa)螺旋筋试件的峰值应力、峰值应变和轴压延性系数分别约为普通强度(432 MPa)螺旋筋试件的1.4、4.4、1.6倍。
To investigate the axial compression performance of ultrahigh strength spiral stirrup confined high strength concrete columns,32 cylinder specimens were designed and manufactured with the concrete strength grade,spiral stirrup ratio and spiral stirrup yield strength as the variation parameters.The results show that the ultrahigh strength spiral stirrup has a longer elastic stress stage,which can effectively overcome the high brittleness problem of high strength concrete,and can also ensure that the plastic deformation of high strength concrete under compression is greater than 3.00%.The peak stress,peak strain and axial compressive ductility coefficient of specimen with ultrahigh strength(1774 MPa)spiral stirrup confined concrete are 1.4,4.4 and 1.6 times to those of specimen with ordinary strength(432 MPa)spiral stirrup confined concrete,respectively.
作者
经承贵
游慧
徐仲恒
陈宗平
JING Chenggui;YOU Hui;XU Zhongheng;CHEN Zongping(College of Civil Engineering and Architectural,Guangxi University of Science and Technology,Liuzhou 545006,China;Key Laboratory of Disaster Prevention&Mitigation and Prestress Technology of Guangxi Colleges and Universities,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangdong Zongheng Engineering Testing Co.,Ltd.,Foshan 528200,China;School of Civil Engineering and Architectural,Guangxi University,Nanning 530004,China)
出处
《建筑材料学报》
北大核心
2025年第8期774-781,815,共9页
Journal of Building Materials
基金
广西科技大学开放基金资助项目(GXKDTJ017)
广西重点研发计划项目(桂科AB21220012)
广西自然科学基金资助项目(2019GXNSFBA245071)
广西科技大学博士基金资助项目(校科博19z41)
国家自然科学基金资助项目(51578163)。
关键词
超高强钢丝
螺旋筋
高强混凝土
约束作用
轴压性能
ultrahigh strength steel wire
spiral stirrup
high strength concrete
confinement effect
axial compression performance
