钢筋混凝土端面重墙结构的抗爆性能规律

doi:10.3969/j.issn.1000-1093.2022.01.014

摘要/Abstract

摘要： 为研究钢筋混凝土端面重墙结构在爆炸冲击波下的抗爆性能，依据最大TNT当量为300 kg的现场试验，对D1、D2、D3 3种不同构型端面重墙的损伤破坏规律进行数值模拟研究。基于LS-DYNA有限元分析软件，建立流体和固体耦合数值模型，计算得到3种重墙房屋结构在爆炸冲击波作用下的破坏形态，并利用试验结果校正模型参数。进一步利用ConWep算法进行爆炸载荷加载，通过控制药量和爆距，得到不同超压和冲量载荷下重墙结构的破坏特征。以重墙的残余倾覆角作为划分依据，将计算结果分为3种破坏等级，拟合得到的超压-冲量曲线和药量-距离曲线可用于燃烧爆炸品厂房安全距离和仓库容量设计以及意外爆炸下的破坏程度评估。对比3种相似结构不同尺寸重墙的超压-冲量曲线，发现小尺寸D2构型的抗爆性能最差；当爆炸载荷超压较小时，大尺寸D3构型与D1构型抗爆性能相似；当超压较大时，D3构型的破坏形式发生变化，超压-冲量曲线发生右倾现象。

关键词: 钢筋混凝土, 端面重墙, 抗爆性能, ConWep算法, 损伤等级, 超压-冲量曲线

Abstract: To study the performance of reinforced concrete blast resistant wall under explosion shock wave, the damage laws of D1, D2 and D3 walls are studied by numerical simulation based on the test with maximum TNT equivalent of 300 kg. Based on LS-DYNA finite element software, a fluid-solid coupling numerical model is applied to calculate the failure modes of the walls under explosion, and the model parameters are corrected according to the test results. ConWep algorithm is used to apply the explosive load, and the failure characteristics of the walls under different overpressures and impulse loads are simulated by controlling the charge mass and explosive distance. Based on the residual dip angle of blast resistant wall after explosion, the numerically calculated results are divided into three damage levels. The overpressure-impulse curve and the charge mass-explosive distance curve obtained by fitting can be used for designing the safety distance of burning explosive plant and the warehouse capacity, and estimating the degree of damage under accidental explosion. By comparing the overpressure-impulse curves of three configurations of walls, it is found that the blast resistance of small size D2 is the weakest; when the peak overpressure of explosion load is small, the blast resistance of D3 is similar to that of D1; and when the overpressure is large, the failure mode of D3 changes, and the overpressure-impulse curve has a tendency of right deviation.

Key words: reinforcedconcrete, blastresistantwall, anti-blastperformance, ConWepalgorithm, damagelevel, overpressure-impulsecurve

中图分类号:

O383⁺.2

王成，杨靖宇，迟力源，王万里，陈泰年. 钢筋混凝土端面重墙结构的抗爆性能规律[J]. 兵工学报, 2022, 43(1): 131-139.

WANG Cheng， YANG Jingyu， CHI Liyuan， WANG Wanli， CHEN Tainian. On the Blast Resistance Performance of Large-scale Reinforced Concrete Wall[J]. Acta Armamentarii, 2022, 43(1): 131-139.

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