Interfacial Stresses in Externally GFRP-plate Concrete Beams
Fiber-reinforced polymer/plastic (FRP) reinforcement is one of the most promising strengthening techniques for reinforcement concrete (RC) beams to improve their loading capacity and safety, which has attracted worldwide attention due to its outstanding properties. Extensive research and applications of FRP have been widely carried out in engineering structures. However, externally bonded FRP strengthening concrete beams tend to debond at low strains, which can severely limit the ductility. The premature failure modes are caused by interfacial stress. In this paper, a series of ten concrete beams strengthened by various length and thickness glass fiber reinforced polymer (GFRP) plate were tested and numerically analyzed to predict the distributions of interfacial stress. Such interfacial stresses play a fundamental role in the bond mechanics of plated beams. Test results show that the length and thickness of GFRP plate have an important effect on interfacial stress. At the end of this paper the law of interfacial stress changing with length and thickness of GFRP plate is obtained, which has potential for application in the design of FRP-strengthened beams. Test results are presented and compared with the finite element analyses, showing reasonable agreement.
strengthening interfacial stresses length and thickness GFRP plates
DING Yahong ZENG Xiantao YANG Xiaolin LIU Zejun
School of Civil Engineering, Henan Polytechnique University, Jiaozuo 454003, Henan, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
2549-2554
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）