Abstract This study evaluates the effectiveness of basalt fiber-reinforced polymer (BFRP) bar reinforcement on the blast-resistant performance of concrete slabs. Contact explosion tests of 30-cm-thick concrete slabs with three layers of reinforcement were conducted. Eight slabs were tested and four were reinforced with steel and four were reinforced with BFRP bars. Four charges of TNT, 0.8, 1.0, 1.6, and 1.9 kg, were set for each type of slab. Damage modes of the crater, medium spall, and severe spall of the normal reinforced concrete slab (NRCS) and BFRP bar reinforced concrete slab (BRCS) were reached under contact explosions of TNT charges of 0.8, 1.0, and 1.6 kg, respectively. The BRCS exhibited severe spall while the NRCS experienced breaching under explosions induced by 1.9 kg TNT. The threshold ranges of spall and breaching of the NRCS and BRCS were obtained. Compared with the NRCS, the BRCS exhibited better blast-resistance based on the smaller crater and spall sizes, the absence of a cross-shaped crack, and the presence of fewer cracks. Existing formulae were applied to predict the damage modes obtained in the tests. McVay's formula caused an overestimation in which the crater modes of all eight slabs were predicted. Although the formulae proposed by Morishita et al. provided better predictions, the thresholds of spall and breaching were inaccurate.

中文翻译：

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玄武岩纤维增强聚合物（BFRP）钢筋混凝土板接触爆炸试验研究

摘要 本研究评估了玄武岩纤维增强聚合物 (BFRP) 钢筋对混凝土板抗爆性能的有效性。对 30 厘米厚的三层钢筋混凝土板进行接触爆炸试验。测试了八块板，其中四块用钢加固，四块用 BFRP 钢筋加固。每种类型的板坯设置了四种 TNT 装料，0.8、1.0、1.6 和 1.9 千克。普通钢筋混凝土板（NRCS）和BFRP钢筋混凝土板（BRCS）分别在0.8、1.0和1.6 kg的TNT装药接触爆炸下达到弹坑、中度剥落和严重剥落的损伤模式。BRCS 表现出严重的剥落，而 NRCS 在 1.9 公斤 TNT 引发的爆炸下发生破裂。获得了NRCS和BRCS的剥落和破坏的阈值范围。与 NRCS 相比，BRCS 表现出更好的抗爆性，因为它的陨石坑和碎片尺寸更小，没有十字形裂纹，裂纹更少。应用现有公式来预测在测试中获得的损坏模式。McVay 的公式导致了高估，其中预测了所有八个板块的火山口模式。虽然 Morishita 等人提出的公式。提供更好的预测，剥落和破坏的阈值是不准确的。应用现有公式来预测在测试中获得的损坏模式。McVay 的公式导致了高估，其中预测了所有八个板块的火山口模式。虽然 Morishita 等人提出的公式。提供更好的预测，剥落和破坏的阈值是不准确的。应用现有公式来预测在测试中获得的损坏模式。McVay 的公式导致了高估，其中预测了所有八个板块的火山口模式。虽然 Morishita 等人提出的公式。提供更好的预测，剥落和破坏的阈值是不准确的。