Basalt fiber-reinforced polymer (BFRP) has been applied for strengthening concrete structures. However, studies on reinforced concrete (RC) slabs strengthened by BFRP strips under impact loads are limited in open literature. This study investigates the efficiency of using BFRP strips with various strengthening layouts and anchoring schemes on the impact resistance of RC slabs. A total of 11 two-way square slabs were prepared and tested, including one reference specimen without strengthening and ten slabs strengthened with BFRP strips and/or anchors. The RC slabs were impacted by a drop weight with increasing height until slab failure. The observed failure modes include punching shear failure, BFRP sheet debonding and reinforcement fracture. The failure modes and the effects of using various strengthening schemes on the impact resistant capacity of RC slabs were examined. The quantitative measurements, such as impact velocity, indentation depth and diameter, were compared and discussed. In addition, numerical studies were carried out by using LS-DYNA to simulate the impact tests of RC slabs with and without BFRP strengthening. With the calibrated numerical model, the impact behavior of slabs with various dimensions and strengthening layouts under different impact intensities can be predicted with good accuracy.

中文翻译：

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冲击载荷下玄武岩玻璃钢条加固钢筋混凝土板的试验与数值研究

玄武岩纤维增强聚合物 (BFRP) 已用于加固混凝土结构。然而，关于在冲击载荷下由 BFRP 条加固的钢筋混凝土 (RC) 板的研究在公开文献中是有限的。本研究调查了使用具有各种加强布局和锚固方案的 BFRP 条对 RC 板的抗冲击性的效率。总共准备和测试了 11 块双向方形板，包括 1 个未加固的参考样品和 10 个用 BFRP 条和/或锚杆加固的板。随着高度的增加，RC 板受到落锤的影响，直到板失效。观察到的破坏模式包括冲切破坏、BFRP 板剥离和钢筋断裂。研究了破坏模式和使用各种加固方案对 RC 板抗冲击能力的影响。对冲击速度、压痕深度和直径等定量测量值进行了比较和讨论。此外，使用 LS-DYNA 进行了数值研究，模拟了有和没有 BFRP 加强的 RC 板的冲击试验。通过校准后的数值模型，可以准确预测不同尺寸和加强布局的板在不同冲击强度下的冲击行为。通过使用 LS-DYNA 进行数值研究，模拟了有和没有 BFRP 加固的 RC 板的冲击试验。通过校准后的数值模型，可以准确预测不同尺寸和加强布局的板在不同冲击强度下的冲击行为。通过使用 LS-DYNA 进行数值研究，模拟了有和没有 BFRP 加固的 RC 板的冲击试验。通过校准后的数值模型，可以准确预测不同尺寸和加强布局的板在不同冲击强度下的冲击行为。