地表爆炸荷载作用下大型输水箱涵的毁伤评估及防护效应分析

杨广栋1,2,王高辉1,2,卢文波1,2,赵小华1,2,严 鹏1,2,陈 明1,2

振动与冲击 ›› 2019, Vol. 38 ›› Issue (5) : 28-37.

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (5) : 28-37.
论文

地表爆炸荷载作用下大型输水箱涵的毁伤评估及防护效应分析

  • 杨广栋1,2,王高辉1,2,卢文波1,2,赵小华1,2,严 鹏1,2,陈 明1,2
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Damage evaluation and protective effect analysis for a large-scale water transmission box culvert under action of ground surface blast loads

  • YANG Guangdong1,2, WANG Gaohui1,2, LU Wenbo1,2, ZHAO Xiaohua1,2, YAN Peng1,2, CHEN Ming1,2
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摘要

随着我国跨区域调水工程的增多,箱涵结构的抗爆问题越来越受到重视。考虑爆炸荷载作用下混凝土的应变率效应、流体与固体间的耦合以及结构的非线性动态响应等复杂问题,基于Lagrangian-Eulerian耦合方法建了地表爆炸荷载作用下钢筋混凝土输水箱涵的全耦合模型。通过与已有的经验公式和现场爆炸试验进行对比,分别验证了土体地表爆炸模型和爆炸荷载作用下钢筋混凝土模型的可靠性;对比研究了有水和无水两种工况下箱涵的动力响应及毁伤发展过程,并分析了地表爆炸荷载作用下冲击波的传播特性;同时采用聚苯乙烯泡沫作为箱涵的防护材料,探讨了其对钢筋混凝土输水箱涵抗爆性能的影响。结果表明:突发地表爆炸荷载将对输水箱涵结构的安全性构成巨大的威胁;而在箱涵顶部铺设聚苯乙烯泡沫可以有效地提高其抗爆性能。

Abstract

With increase in trans-regional water transfer projects, anti-blast problems of water transmission box culverts receive great attentions. Here, considering the strain rate effect of concrete material under blast loading, fluid-structure interaction and nonlinear dynamic responses of structures, a reinforced concrete (RC) box culvert fully coupled model based on Lagrange and Euler combined method was established under the action of ground surface blast loads. A numerical model of soil body surface blast was established. Compared with the published empirical formulas and the actual blast tests, the reliabilities of the soil surface blast model and the RC box culvert one under soil surface blast loads were verified, respectively. Dynamic responses and damage processes of the RC box culvert under soil surface blast with and without water were contrastively studied. The shock wave propagation characteristics in the RC box culvert model were investigated. Meanwhile, polystyrene foams were used as protective material, and its effects on the RC box culvert anti-blasting performance were explored. The results showed that ground surface blast loads are a great threat to the security of the RC box culvert; laying polystyrene foams on the top of the RC box culvert can improve its anti-blast performance effectively.

关键词

输水箱涵 / 地表爆炸 / 动力响应 / 毁伤特征 / 防护措施

Key words

water transmission box culvert / surface explosion / dynamic response / damage characteristics / safeguard procedures.

引用本文

导出引用
杨广栋1,2,王高辉1,2,卢文波1,2,赵小华1,2,严 鹏1,2,陈 明1,2. 地表爆炸荷载作用下大型输水箱涵的毁伤评估及防护效应分析[J]. 振动与冲击, 2019, 38(5): 28-37
YANG Guangdong1,2, WANG Gaohui1,2, LU Wenbo1,2, ZHAO Xiaohua1,2, YAN Peng1,2, CHEN Ming1,2. Damage evaluation and protective effect analysis for a large-scale water transmission box culvert under action of ground surface blast loads[J]. Journal of Vibration and Shock, 2019, 38(5): 28-37

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