摘要
为研究SFCB(钢-连续纤维复合筋)混凝土柱在单轴压缩状态下的特性,分别以纤维增强聚合物筋、钢-连续纤维复合增强筋作为配筋,设计并制作了12个直径为150 mm,高为300 mm的混凝土柱试件,基于声发射技术进行了单轴受压试验,获得了试件在单轴受压过程中的声发射信号。结果表明,SFCB相较于纤维增强聚合物筋具有良好的延性,可在一定程度上提高混凝土柱试件的极限承载力,其具有稳定的二次刚度,可以提高混凝土柱的抗变形能力;相比于BFRP(玄武岩纤维增强筋),SFCB能更好地限制拉伸裂缝的开展。
In order to study the characteristics of SFCB(steel-continuous fiber composite bar) concrete column under uniaxial compression, 12 concrete column specimens with diameter of 150 mm and height of 300 mm were designed and manufactured with fiber reinforced polymer reinforcement and steel-continuous fiber composite reinforcement as reinforcement respectively. Uniaxial compression tests were carried out based on acoustic emission technology. The acoustic emission signals of the specimens under uniaxial compression were obtained. The results show that SFCB has better ductility than the fiber reinforced polymer bars. SFCB can improve the ultimate bearing capacity of concrete columns to a certain extent. SFCB has stable post-yield stiffness and can improve the anti-deformation capacity of concrete columns. Compared with BFRP(basalt fiber reinforced plastics), SFCB can better limit the development of tensile fracture.
作者
吴瑾
陈徐东
唐煜
郭玉柱
宁英杰
WU Jin;CHEN Xudong;TANG Yu;GUO Yuzhu;NING Yingjie(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China;College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China;Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou 310051,China)
出处
《无损检测》
CAS
2021年第11期18-22,52,共6页
Nondestructive Testing
基金
国家自然科学基金资助项目(52008211,51979090)
江苏省高等学校自然科学研究面上项目(20KJB560015)
中央高校基本科研业务费专项资金资助项目(B200202076)。
关键词
SFCB混凝土
单轴压缩
破坏模式
二次刚度
SFCB concrete
uniaxial compression
failure mode
post-yield stiffness
