【作者】 王勃； 欧进萍； 张新越； 周智； 何政； 钱民中；

【Author】 WANG Bo, OU Jin-ping, ZHANG Xin-yue, ZHOU Zhi, HE Zheng, QIAN Min-zhong(School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;Harbin Fiber Reinforced Plastic Institute, Harbin 150036, China)

【机构】 哈尔滨工业大学土木工程学院； 哈尔滨玻璃钢研究院；

【摘要】 在纤维增强聚合物Fiber Reinforced Polymer(FRP)筋拉挤工艺中,将光纤布拉格光栅Optic FiberBragg Grating(OFBG)传感器与普通纤维束一起经过拉挤模具,为改进FRP筋与混凝土的粘结性能,在FRP筋表面螺旋缠绕纤维束,制备了智能OFBG-FRP筋.对OFBG—FRP筋的力学性能和应变灵敏性能进行试验研究。试验结果表明OFBG—FRP筋的力学性能与普通FRP筋相同、OFBG—FRP筋的应变灵敏系数与普通光纤传感器相同、OFBG—FRP筋在重复荷载作用下性能良好.OFBG—FRP加筋混凝土梁受弯试验表明OFBG-FRP筋可以监测混凝土梁的开裂和FRP筋与混凝土的滑移.在OFBG—FRP筋中埋置多个光纤传感器可以监测沿FRP筋长度方向的应变分布及混凝土与FRP筋发生滑移的位置.OFBG—FRP筋在混凝土结构中可以作为受力材料和传感器.更多还原

【Abstract】 OFBG-FRP bar was pultruded with the fiber strands and optic fiber bragg grating sensor, helically wound fiber strands was introduced to bars to improve the bond properties between OFBG-FRP bar and concrete. The mechanical and strain sensing properties of OFBG-FRP bars were compared with the FRP bars and OFBG sensors respectively. Test results reveal that the mechanical and strain sensing coefficient of OFBG-FRP bars are similar to FRP bars and OFBG sensors respectively. The flexural test results of concrete beams reinforced with OFBG-FRP bars show that OFBG-FRP bars can monitor the crack of beam and the slippage between FRP bar and concrete. The OFBG-FRP bar can monitor the strain distribution along the lognitudinal length of the bar and the location of slippage between FRP bar and concrete by the means of embedding some OFBG sensors in FRP bars. OFBG-FRP bar can serve as both reinforcement and sensors in concrete structures.更多还原