Field full-scale experimental study on the bonding performance of large diameter GFRP bars and concrete

doi:10.19936/j.cnki.2096-8000.20221028.005

Abstract

Abstract: In order to study the adhesion performance of GFRP tendons and concrete, the field ultimate pullout test of GFRP tendons was carried out by using the test method of field trenching and grouting to clarify the adhesion performance of GFRP tendons and concrete, and to analyze the ultimate pullout bearing capacity of GFRP tendons and the factors affecting the slippage. The results show that the failure mode of GFRP anti-floating reinforcement is mainly shear slip failure. The ultimate pullout bearing capacity of GFRP bars increases with the increase of vertical anchorage length and anchor bar diameter. The bending treatment can effectively reduce the anchor bar slippage, and the longer the vertical anchorage length, the smaller the slippage of GFRP bars. The slippage of GFRP bars decreases with the increase of bending length. Bending the GFRP bar will weaken its ultimate bearing capacity, and the method of increasing its ultimate bearing capacity through the current bending process is less effective.

Key words: GFRP bar, bond-slip, ultimate pull-out capacity, bond strength, bending

CLC Number:

TB332

WANG Feng-jiao, BAI Xiao-yu, CHEN Ji-guang, YU Long-tao, LI Ming, ZHU Lei. Field full-scale experimental study on the bonding performance of large diameter GFRP bars and concrete[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(10): 33-37.

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