GFRP Reinforcement for Concrete Structures-Study of the Effect of Surface Profile on Bond Behavior
Glass Fibre Reinforced Polymer (GFRP) bars became an alternative to that of traditional steel as internal reinforcement of concrete structures especially when their electrolytic corrosion resistance is important.GFRP bars show superior mechanical properties and have low weight (density).However, the bond behavior and bond strength of GFRP bars in concrete is not fully characterized, particularly, the effect of the numerous different surface profiles of GFRP bars calls for further studies.This paper presents a part of an extensive experimental study on the effect that the surface profile has on the bond behavior, strength and failure mode of GFRP bars in concrete.The experimental program was designed to study this effect using different test setups (pull-out test and direct tension pull-out tests) so that an adequate overview of the surface effect can be achieved.GFRP bars with different surface profiles have been used in this study, such as indented, helically wrapped, sand coated and helically wrapped and sand coated.Furthermore, ribbed steel bars were also used for comparison.Test results along with discussion are presented in this paper.Based on the experimental results it was concluded that the surface profile has a considerable effect of the bond behavior in concrete.Moreover, the failure mode of the bond is significantly affected.The test setup was found to affect the bond strength, being lower in case of direct tension pull-out test.The slip value, adherent to the bond strength, was observed to be the lowest for sand coated bars.Finally, the bond strength results of all GFRP bars were consistently higher than those of steel bars.
GFRP bars bond surface profile test type
S.Solyom G.L.Balázs
Department of Construction Materials and Technologies, Budapest University of Technology and Economics,Budapest, Hungary
国际会议
福州
英文
1119-1128
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）