高强钢绞线与纤维增强聚合物砂浆粘结滑移性能研究  

Experimental investigation on bond-slip behavior between high strength steel strand and fiber reinforced polymer mortar

作　　者：廖维张[1,2] 王俊杰 王红炜[1,2] 王秋婉 LIAO Weizhang;WANG Junjie;WANG Hongwei;WANG Qiuwan(Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [2]北京建筑大学北京未来城市设计高精尖创新中心,北京100044

出　　处：《建筑结构》2023年第14期90-95,118,共7页Building Structure

基　　金：北京建筑大学市属高校基本科研业务费专项资金(X20062);国家自然科学基金项目(51878028)。

摘　　要：高强钢绞线-纤维增强水泥基材料作为新型建筑加固修复材料,依靠其内部各组分材料的有效粘结应力,起到加固修复、阻裂增韧的效果。为理清高强钢铰线与纤维增强聚合物之间的粘结滑移机理,共设计55个轴心拉拔试件。得出试件的拉拔力-位移曲线并计算钢绞线与纤维水泥基材料界面粘结强度,分析多种短切纤维、不同基体强度、不同锚固长度等对加固材料粘结能力的影响。结果表明:锚固界面以剪切破坏为主;掺入纤维会削弱基体与钢绞线间的界面机械咬合力,钢纤维可增强基体与钢绞线滑移后的界面摩擦力,使拉拔力下降幅度较小,为15%~35%。As a new emerging building reinforcement and repair material,high strength steel strand-fiber reinforced cementitious matrix depends on the effective bond-stress of internal component materials to have the effect of strengthening and repairing,resisting crack and toughness.55 specimens were studied by the center pull-out tests to research the bondslip behavior between the high strength steel strand and fiber reinforced cementitious matrix.The pull out forcedisplacement curves were obtained for each specimen,bond-slip behavior and bond strength between the high strength steel strand and fiber reinforced cementitious matrix were analyzed comprehensively.The types and strength of fiber reinforced cementitious matrix on the bond-slip strengthen were investigated,reinforce with different fiber’s types,different matrix,different anchorage length,etc.The results show that the anchorage interface is mainly subjected to shear failure;Fibers will weaken the mechanical bonding force between the matrix and steel strand at the interface,while steel fibers can enhance the interfacial friction force between matrix and steel strand after sliding,resulting in a minor decrease in pulling force,ranging from 15%~35%.

关 键 词：高强钢绞线 纤维增强水泥基材料 聚丙烯纤维 钢纤维 拉拔试验 粘结滑移 

分 类 号：TU376[建筑科学—结构工程]