海水环境下CFRP筋与海水海砂混凝土黏结耐久性试验研究  

Experimental Study on Bond Durability Between CFRP Bars and Seawater Sea Sand Concrete in Seawater Environment

作　　者：武江传 谭振昆 谢青海 施勇 顾洋 杨祥 WU Jiangchuan;TAN Zhenkun;XIE Qinghai;SHI Yong;GU Yang;YANG Xiang(School of Civil and Ocean Engineering,Jiangsu Ocean University,Lianyungang 222005,China;Jiangsu Ocean Engineering Research Center for Intelligent Infrastructure Construction,Lianyungang 222002,China)

机构地区：[1]江苏海洋大学土木与港海工程学院,江苏连云港222005 [2]江苏省海洋工程基础设施智能建造工程研究中心,江苏连云港222002

出　　处：《江苏海洋大学学报（自然科学版）》2024年第2期53-60,共8页Journal of Jiangsu Ocean University:Natural Science Edition

基　　金：江苏省自然科学基金资助项目(BK20210925)。

摘　　要：为研究海水环境下碳纤维增强复合材料筋(CFRP筋)与海水海砂混凝土的黏结强度、黏结破坏模式、黏结—滑移曲线的影响因素,制作了13组(共39个)CFRP筋-海水海砂混凝土黏结试件进行偏心拉拔试验,研究混凝土强度等级、筋材类型、腐蚀环境及腐蚀龄期等因素对CFRP筋与海水海砂混凝土之间黏结性能的影响。结果表明:CFRP筋与海水海砂混凝土的黏结强度随着混凝土强度等级的增大而明显增强;在海水腐蚀环境下,CFRP筋较普通钢筋抗腐蚀能力强,其破坏模式及黏结—滑移曲线表现良好;经过海水长期浸泡和干湿循环后,CFRP筋与海水海砂混凝土黏结强度均呈现下降趋势;随着腐蚀龄期的增加,CFRP筋与海水海砂混凝土的黏结强度呈现先减小后增大趋势,且干湿循环试件比长期浸泡试件受到的腐蚀程度更严重。In order to study the influence factors of bond strength,bond failure mode and bondslip curve between CFRP bars and seawater sea sand concrete in seawater environment,13 groups(39 in total)of CFRP bars-seawater sea sand concrete bond specimens were made for eccentric pull-out test.The effects of concrete strength grade,reinforcement type,corrosion environment and corrosion age on the bond performance between CFRP bars and seawater sea sand concrete were studied.The results show that the bond strength between CFRP bars and seawater and sea sand concrete increases obviously with the increase of concrete strength grade.In the seawater corrosion environment,CFRP bars have stronger corrosion resistance than ordinary steel bars,and their failure modes and bond-slip curves perform well.After long-term immersion in seawater and dry-wet cycles,the bond strength of CFRP bars and seawater sand concrete showed a downward trend.With the increase of corrosion age,the bond strength between CFRP bars and seawater sea sand concrete decreases first and then increases,and the corrosion degree of dry-wet cycle specimens is more serious than that of long-term immersion specimens.

关 键 词：CFRP筋 海水海砂混凝土 黏结耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]