带缺陷的装配式浆锚连接拉拔性能研究  

Study on the Pulling Performance of Prefabricated Grout-filled Lap Joint with Defects

作　　者：杨凯淳 姚菲[1] 庄佳纯 YANG Kaichun;YAO Fei;ZHUANG Jiachun(College of Civil and Transportation Engineering,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]河海大学土木与交通学院,江苏南京210098

出　　处：《河北工程大学学报(自然科学版)》2024年第6期73-78,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(52478248);中央高校基本科研业务费专项资金资助项目(B200202086)。

摘　　要：为研究装配式浆锚搭接连接节点处灌浆缺陷对连接性能的影响,进行了39个含不同位置、不同长度缺陷的浆锚连接试件的单向拉伸试验,研究了灌浆缺陷种类与灌浆缺陷程度对浆锚连接受力性能的影响规律。结果表明,当缺陷程度不超过40%时,缺陷分布类型对浆锚连接的受力性能影响不大,对于缺陷程度为50%、60%的各类缺陷试件,峰值荷载从大到小依次是离散缺陷、端部缺陷、中部缺陷。实际工程中最应避免的是灌浆料中部缺陷,其次是灌浆料离散缺陷,最后是灌浆孔端部缺陷。综合位移比变化趋势的转折点体现出随着缺陷程度的增大,试件破坏模式由钢筋拉断转变为钢筋拔出。To investigate the effect of grouting defects on the connection performance of prefabricated grout anchor lap joints,39 grout anchor connection specimens with different positions and lengths of defects were tested using uniaxial tensile tests.The influence of grouting defect types and degrees on the stress performance of grout anchor connections was studied.The results show that when the defect level does not exceed 40%,the distribution type of defects has little effect on the stress performance of the grout anchor connection.For various types of defect specimens with defect levels of 50%and 60%,the peak load from large to small is the discrete defect,end defect,and middle defect.The most important thing to avoid in practical engineering is the defect in the middle of the grouting material,followed by the discrete defect of the grouting material,and finally the defect at the end of the grouting hole.The turning point of the comprehensive displacement ratio trend reflects that as the degree of defect increases,the failure modes of the specimens change from steel bar failure to bar pull-out.

关 键 词：冲击回波法 浆锚连接 缺陷 粘结滑移 单向拉伸试验 拉拔破坏 

分 类 号：TU37[建筑科学—结构工程]