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无腹筋GFRP筋混凝土梁抗剪性能试验

, PP. 51-57

Keywords: 桥梁工程,混凝土梁,试验研究,GFRP筋,抗剪承载力

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Abstract:

?对一组无腹筋玻璃纤维增强塑料(FiberGlass-reinforcedPlastics,GFRP)筋混凝土梁的抗剪性能进行了试验研究,所有试验梁均为三分点加载,将6根试验梁按有效配筋率分为3组,每组包括1根钢筋混凝土梁和1根GFRP筋混凝土梁,且所有试验梁均为斜拉破坏;分析了试验梁的荷载-挠度关系、裂缝开展及抗剪承载力,并将各FRP筋设计规范或指南的抗剪承载力预测值与试验结果进行对比。结果表明:有效配筋率相同的钢筋混凝土梁和GFRP筋混凝土梁具有相近的抗剪承载力;修正的CAN/CSA-S6-06抗剪承载力预测结果与试验结果符合度最高,而ACI440.1R-06的预测结果过于保守;建议的FRP筋混凝土梁抗剪承载力公式提高了承载力预测精度。

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