接触爆炸下玄武岩纤维混凝土板毁伤特性研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (11) : 39-49.

冲击与爆炸

接触爆炸下玄武岩纤维混凝土板毁伤特性研究

赵小华1,3，李亚男1，赵浩楠*1，王高辉2，杜雪明1,3，方宏远1,3

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Damage characteristics of basalt fiber reinforced concrete slab under contact explosion

ZHAO Xiaohua1,3, LI Yanan1, ZHAO Haonan*1, WANG Gaohui2, DU Xueming1,3, FANG Hongyuan1,3

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摘要

玄武岩纤维因具有优异的物理力学性能，掺入混凝土中可以增加材料的抗拉和抗弯强度。本文通过开展不同长度和体积掺量的玄武岩纤维混凝土板接触爆炸试验，探究了纤维长度和体积掺量对混凝土板抗爆性能和毁伤模式的影响。在此基础上，采用LS-DYNA有限元软件建立了玄武岩纤维混凝土板接触爆炸全耦合模型，并通过与现场试验结果的对比，验证了所建数值模型的有效性。通过仿真分析，进一步研究了接触爆炸下玄武岩纤维混凝土板的动态毁伤过程，概化了纤维长度、纤维体积掺量、炸药质量对混凝土板毁伤模式的影响规律。结果表明：纤维长度的增加能更好地发挥桥接作用来提高混凝土板的抗裂能力；纤维体积掺量的增大能有效减小混凝土板的毁伤；纤维长度40mm、体积掺量0.5%是提升混凝土板抗爆性能的最优组合之一。

Abstract

Basalt fiber can be incorporated into concrete to increase the tensile and flexural strength of the material due to its excellent physical and mechanical properties. In this paper, contact explosion tests on basalt fiber reinforced concrete slabs with different lengths and volume ratios were carried out to investigate the effects of fiber length and volume ratios on the blast resistance and damage modes of concrete slabs. On this basis, the LS-DYNA finite element software was used to establish a fully coupled model of contact explosion of basalt fiber reinforced concrete slabs, and the validity of the numerical model was verified by comparing with the field test results. Through simulation analysis, the dynamic damage process of basalt fiber-reinforced concrete slabs under contact explosion was further studied, and the effects of fiber length, fiber volume mixing, and explosive quality on the damage pattern of concrete slabs were generalized. The results show that: increasing the fiber length can better play the role of bridging to improve the cracking resistance of concrete slabs; increasing fiber volume ratio can effectively reduce the damage of concrete slabs; the fiber length of 40 mm, volume ratio 0.5% is one of the optimal combinations to enhance the blast resistance of concrete slab.

导出引用

赵小华1, 3, 李亚男1, 赵浩楠1, 王高辉2, 杜雪明1, 3, 方宏远1, 3. 接触爆炸下玄武岩纤维混凝土板毁伤特性研究[J]. 振动与冲击, 2025, 44(11): 39-49

ZHAO Xiaohua1, 3, LI Yanan1, ZHAO Haonan1, WANG Gaohui2, DU Xueming1, 3, FANG Hongyuan1, 3. Damage characteristics of basalt fiber reinforced concrete slab under contact explosion[J]. Journal of Vibration and Shock, 2025, 44(11): 39-49

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