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工程力学  2015 

抗剪加固FRP与混凝土界面粘结性能的试验研究

DOI: 10.6052/j.issn.1000-4750.2014.04.0341, PP. 164-175

Keywords: 混凝土,FRP,界面粘结,纤维受拉角度,剥离,抗剪加固

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Abstract:

为了深入理解抗剪加固FRP与混凝土界面的粘结性能,该文对侧面粘贴FRP的21根预置裂缝小梁进行了试验研究。试验设计考虑了FRP粘结长度、宽度、厚度及FRP纤维方向与裂缝张开方向的角度(简称“FRP纤维受拉角度”,用θ表示)对FRP与混凝土界面粘结性能的影响。试验结果表明:1)所用的预置裂缝小梁可以有效对FRP与混凝土的界面粘结性能进行试验研究;2)FRP粘结长度、宽度、厚度及纤维受拉角度等因素对粘结强度有明显影响;3)FRP应变沿宽度方向的分布是不均匀的,这主要是由于裂缝不均匀开展导致FRP在裂缝开展快的一边先剥离。

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