【作者】 周磊生； 张峰； 朱世超； 高磊； 朱颖；

【Author】 ZHOU Leisheng;ZHANG Feng;ZHU Shichao;GAO Lei;ZHU Ying;Qilu Transportation Development Group Shandong;Shandong University Geotechnical and Structural Engineering Research Center Shandong;

【机构】 齐鲁交通发展集团有限公司； 山东大学岩土与结构工程研究中心；

【摘要】 为了研究混合粘接纤维复材(HB-FRP)加固混凝土结构中单个钢扣件的界面力学性能,对6个模型进行了测试,研究了螺栓扭矩系数、破坏模式、荷载-滑移关系、黏结滑移关系、剥离面摩擦系数、剥离过程中压力变化。研究结果表明:HB-FRP加固系统中扭矩和正压力呈线性关系;在钢扣件下基层混凝土剥离深度约为5mm,剥离面呈楔形;HB-FRP加固系统剥离面存在稳定的摩擦力,该摩擦力能继续承担张拉端拉力;混凝土破坏面的摩擦系数为1.089;采用本文试验参数得出的HB-FRP的黏结强度约为19MPa,远高于普通外贴的界面强度。更多还原

【Abstract】 In order to study the interface mechanical properties of a single mechanical fastener in a HB-FRPreinforced concrete structure, six models were tested, and the bolt torque coefficient, failure mode, load-slip relationship, bond-slip relationship, and debonding surface friction coefficient, pressure change during debonding. The results show that the torque and positive pressure in the HB-FRP reinforcement system are linear; the debonding depth of the base concrete under the mechanical fastener is about 5 mm, and the debonding surface is wedge-shaped; there is a stable friction force on the debonding surface of the HB-FRP reinforcement system. The force can continue to bear the loaded end tension; the friction coefficient of the concrete failure surface is 1. 089; the bond strength of HB-FRP obtained by using the test parameters in this paper is about 19 MPa, which is much higher than the interface strength of ordinary external bonding.更多还原