FRP筋与混凝土黏结破坏性能研究

Experimental study on bond failure between FRP bars and concrete

对27个黏结试件进行拔出试验,试验参数为筋直径、黏结长度和混凝土强度。研究了FRP筋与混凝土的黏结破坏形式,试验结果表明:黏结长度较小、中等和较大时黏结破坏形式分别为筋拔出、混凝土劈裂和筋拉断破坏。混凝土强度和FRP筋直径等因素对黏结破坏形式没有直接影响。研究结果为确定FRP筋的黏结锚固长度和制定相关规范提供试验依据。

The 27 pull-out bond tests were carried out and the effect on the bond behavior of some parameters such as diameter of FRP bar, bond length and concrete strength were studied.The bond failure mode was studied.The experiment results show that the bond failure modes were FRP bar pull-out,concrete split and FRP bar rupture for the bond length were small,medium and large,respectively.The concrete strength and diameter of FRP bar have no effect on the bond failure mode.