摘要
为研究纤维复合筋(FRP筋)和混凝土的黏结性能,采用声发射(Acoustic Emission,AE)技术监测16个黏结滑移试件的试验过程,研究不同参数(筋材类型、筋材直径和黏结长度)对试件黏结性能的影响。试验结果表明:不同类型筋材和混凝土的黏结机理不同,其黏结性能与破坏模式具有显著差异;筋材直径和黏结长度对黏结强度产生影响;筋材肋间距是黏结-滑移曲线周期性波动的主要原因。AE信号能量的变化可有效监测FRP筋和混凝土的黏结-滑移劣化过程,AE技术在探究FRP筋和混凝土的黏结破坏机理方面具有重要理论意义和应用价值。
The pull-out process of 16 cube specimens were monitored by acoustic emission method to study the bond behavior of fiber reinforced polymer bars(FRP bars)and concrete.The influence of different parameters(rebar types,rebar diameters and development length)on the bond behavior of the specimens was investigated.The test results showed that the bonding mechanism between different types of rebars and concrete was different,which resulted in significant differences in the bond-slip behavior and failure modes.The bond strength was affected by the diameters of rebars and the development length.In addition,it was found that the rib spacing of the rebars was the main reason for the periodic fluctuation of the bond-slip curves.At the same time,the bond degradation process of FRP bars and concrete could be effectively monitored by the change of the AE signal energy.The bond-slip process of different types of bars and concrete could be investigated by AE method.The AE method has theoretical significance and application value in exploring the bond failure mechanism of FRP bars and concrete.
作者
张黎飞
赵行立
黄婷
罗远彬
李皓天
郑愚
邸博
夏立鹏
ZHANG Lifei;ZHAO Xingli;HUANG Ting;LUO Yuanbin;LI Haotian;ZHENG Yu;DI Bo;XIA Lipeng(Shenzhen Baiqin Construction Engineering Co.,Ltd.,Shenzhen 518000,China;School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518061,China)
出处
《混凝土》
CAS
北大核心
2021年第10期124-128,共5页
Concrete
基金
国家自然科学基金(51678149)
广东省普通高校国际暨港澳台合作创新平台及重大项目(自然科学)-特色创新项目(2015KTSCX141)
广东省科技计划-公益研究与能力建设方向(2016A010103045)
东莞市社会科技发展重点项目(2018507140160)
东莞理工学院科研启动专项经费项目(GC300502-31)。
作者简介
第一作者:张黎飞(1989-),男,博士在读,从事ECC、FRP、结构性能研究。联系地址:广东省东莞市松山湖区大学路一号教师村6栋801东莞理工学院生态环境与建筑工程学院(523808),联系电话:18814137571;通讯作者:赵行立(1971-),男,正高级工程师,从事深基坑及高边坡工程等方面的设计、施工和科研工作。联系电话:13823329527。
