碳纤维布-钢界面黏结性能试验研究
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摘要
为研究碳纤维布-钢界面的黏结性能,进行了界面单剪试验,分析钢板表面粗糙度、碳纤维布层数以及碳纤维布宽度对界面剥离承载力、黏结剪应力和滑移量的影响,并测量了钢板表面粗糙度,对界面进行电镜扫描,以分析界面结合状态。试验表明,试件的破坏多发生于胶-钢界面,胶层与纤维在钢板的黏附量与钢板表面处理形式相关;界面极限剥离荷载随碳纤维布宽度和层数的增加呈非线性增长,喷砂试件界面剥离荷载达到最大值;喷砂能够有效增强胶层在钢板上的浸润性。
The parameters considered in the test include steel surface roughness,CFRP thickness and CFRP width.The simple shear tests on CFRP-steel interface were carried out to analyzed the influence of these parameters on interfacial failure load,bond shear stress and slip. The steel surface roughness was measured and interfacial micromorphology was scanned. The test results demonstrated that the failures appeared at adhesive-steel interface mostly.The degree of adhesive and carbon fiber attached to steel plates was related to steel surface treatment. The interfacial failure load increased nonlinearly with the increase of CFRP thickness and width,as well as the specimens treated with sand blasting reached the maximum. And sand blasting could improve the wettability of adhesive on steel plates effectively.
The parameters considered in the test include steel surface roughness,CFRP thickness and CFRP width.The simple shear tests on CFRP-steel interface were carried out to analyzed the influence of these parameters on interfacial failure load,bond shear stress and slip. The steel surface roughness was measured and interfacial micromorphology was scanned. The test results demonstrated that the failures appeared at adhesive-steel interface mostly.The degree of adhesive and carbon fiber attached to steel plates was related to steel surface treatment. The interfacial failure load increased nonlinearly with the increase of CFRP thickness and width,as well as the specimens treated with sand blasting reached the maximum. And sand blasting could improve the wettability of adhesive on steel plates effectively.
引文
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[3]完海鹰,郭裴.CFRP加固钢结构的现状与展望[J].安徽建筑工业学院学报(自然科学版),2006,14(6):1-4.
[4]刘素丽.碳纤维布与钢板的粘结机理研究[D].武汉:武汉大学,2004.
[5]冯传清.CFRP加固修复钢构件界面性能试验研究和理论分析[D].合肥:合肥工业大学.2007.
[6]YU T,FERNANDO D,TENG J G.Experimental Study on CFRP-to-Steel Bonded Interfaces[J].Composites Part B:Engineering,2012,43(5):2279-2289.
[7]FERNANDO D,YU T,TENG J G.Behavior of CFRP Laminates Bonded to a Steel Substrate Using a Ductile Adhesive[J].American Society of Civil Engineers,2013,18(2):411-419.
[8]XIA S,TENG J G.Behaviour of FRP-to-Steel Bonded Joints[C]∥Proceedings of the International Symposium on Bond Behaviour of FRP in Structures.2005.
[9]薛耀.CFRP-钢粘贴界面粘结性能试验研究[D].南京:东南大学,2014.
[10]KIM Y J,BRUNELL G.Interaction Between CFRP-Repair and Initial Damage of Wide-Flange Steel Beams Subjected to Three-Point Bending[J].Composite Structures,2011,93(8):1986-1996.
[11]HMIDAN A,KIM Y J,YAZDANI S.CFRP Repair of Steel Beams with Various Initial Crack Configuration[J].Journal of Composites for Construction,2011,15(6):952-962.
[12]中华人民共和国国家质量监督检验检疫总局.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2010[S].北京:中国标准出版社,2010.
[13]中华人民共和国国家质量监督检验检疫总局.定向纤维增强塑料拉伸性能试验方法:GB/T 3354-1999[S].北京:中国标准出版社,2014.
[14]DAI J G,UETA T,SATO Y.Development of Nonlinear Bond Stress-Slip Model of Fiber Reinforced Plastics Sheet-Concrete Interfaces with a Simple Method[J].Journal of Composites for Construction,2005,9(1):52-62.