Abstract This paper presents experimental and analytical studies on the shear strengthening of reinforced concrete (RC) beams by basalt fiber reinforced polymer (BFRP) composites. The effects of BFRP composite and wrapping methods are investigated on shear strengthening of RC beams. In addition, the calculation methods suitable for these strengthening methods are investigated by comparing the results of the experimental study with the existing calculation methods. The beams with rectangular cross section were produced with steel reinforcement and low strength concrete and designed to have a sufficient flexural moment capacity but insufficient shear capacity. However, that beams with two shear regions are designed to be one side shear strength sufficient and the other side insufficient. The shear insufficient regions of the RC beams were strengthened with BFRP composites; full wrapping, side bonding and strips methods. Specimens were tested by four-point flexural test under monotonic loading. The change in shear strength, deflections, shear crack opening and shear deformations were investigated from the results of the experiment. According to the experimental results, the shear capacity of RC beams strengthened with BFRP composites increased between 43% and 100%. The best results were gained by fully wrapped sheets and fully wrapped strips configurations among strengthening configurations. In addition, an appropriate prediction model has been determined to the shear strengthening configurations.

中文翻译：

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玄武岩FRP带材不同包覆方式RC梁抗剪加固试验研究

摘要 本文介绍了玄武岩纤维增强聚合物 (BFRP) 复合材料对钢筋混凝土 (RC) 梁进行剪切加固的实验和分析研究。研究了 BFRP 复合材料和包裹方法对 RC 梁抗剪加固的影响。此外，通过将实验研究的结果与现有的计算方法进行比较，研究了适用于这些加固方法的计算方法。矩形截面梁由钢筋和低强度混凝土制成，设计具有足够的弯矩承载力但剪切承载力不足。然而，具有两个剪切区域的梁被设计为一侧剪切强度足够，而另一侧剪切强度不足。钢筋混凝土梁的剪切不足区域用BFRP复合材料加固；全包裹、侧面粘合和条带方法。试样在单调加载下通过四点弯曲试验进行测试。根据实验结果研究了剪切强度、挠度、剪切裂纹张开和剪切变形的变化。根据试验结果，用 BFRP 复合材料加固的 RC 梁的抗剪承载力提高了 43% 到 100%。在加强配置中，完全包裹的板材和完全包裹的条带配置获得了最好的结果。此外，还确定了一个合适的预测模型来应对抗剪强化配置。试样在单调加载下通过四点弯曲试验进行测试。根据实验结果研究了剪切强度、挠度、剪切裂纹张开和剪切变形的变化。根据试验结果，用 BFRP 复合材料加固的 RC 梁的抗剪能力提高了 43% 到 100%。在加强配置中，完全包裹的板材和完全包裹的条带配置获得了最好的结果。此外，还确定了一个合适的预测模型来应对抗剪强化配置。试样在单调加载下通过四点弯曲试验进行测试。根据实验结果研究了剪切强度、挠度、剪切裂纹张开和剪切变形的变化。根据试验结果，用 BFRP 复合材料加固的 RC 梁的抗剪能力提高了 43% 到 100%。在加强配置中，完全包裹的板材和完全包裹的条带配置获得了最好的结果。此外，还确定了一个合适的预测模型来应对抗剪强化配置。用 BFRP 复合材料加固的 RC 梁的抗剪能力增加了 43% 到 100%。在加强配置中，完全包裹的板材和完全包裹的条带配置获得了最好的结果。此外，还确定了一个合适的预测模型来应对抗剪强化配置。用 BFRP 复合材料加固的 RC 梁的抗剪能力增加了 43% 到 100%。在加强配置中，完全包裹的板材和完全包裹的条带配置获得了最好的结果。此外，还确定了一个合适的预测模型来应对抗剪强化配置。