设防爆层钢箱梁缩尺结构抗近场爆炸作用试验研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (1) : 46-51.

论文

李文武1，耿少波2，贺耀北1,3

作者信息 +

Tests for near-field explosion resistance of steel box girder scale structure with anti-explosion layer

LI Wenwu1, GENG Shaobo2, HE Yaobei1,3

Author information +

文章历史 +

摘要

为研究设防爆层钢箱梁抗近场爆炸作用效果，本文以53g炸药当量、70mm爆距为典型爆炸条件，开展了混凝土-单层/双层钢丝网板、5层/10层凯夫拉板及其组合为防爆层的钢箱梁缩尺结构近场爆炸试验研究。以塑性变形能为抗爆效果考查指标，8种试验工况结果表明：近场爆炸作用下无防护钢箱梁顶板会发生沿U型加劲肋的撕裂破坏及球冠状凹坑，且横隔板间距250mm比间距150mm的钢箱梁顶板破坏严重，变形能约高出60%；混凝土-双层钢丝网板较单层钢丝网板能降低钢箱梁顶板的变形能约2.2%；混凝土-双层钢丝网板与5层凯夫拉组合作为防爆层，顶板塑性变形能降低至无防护结构钢箱梁顶板的34.5%，混凝土-双层钢丝网板与10层凯夫拉组合作为防爆层，该数值约为32.7%。

Abstract

In order to study the anti-blast effect of the steel box girder with blast-proof layer under near field blast, 53g explosive equivalent and 70mm blasting distance are used as explosion test parameters for the same scale model experiments. Concrete-single layer/double layers steel plate, 5 layers/10 layers Kevlar plate and their combination as blast-proof layer of scale steel box girder were tested in near field blast. Taking the plastic deformation energy of top plate as evaluation index, eight typical test results show that the top plate will undergo tearing damage along the U-stiffened plate for steel box girder without any protective blast-proof layer. The top plate of steel box girder with diaphragm spacing of 250mm is more severe than the diaphragm spacing of 150mm, and the deformation energy is about 60% higher. Double layer steel wire mesh concrete will reduce the deformation energy of top plate by 2.2% compared to single-layer steel wire mesh concrete. The combination of double layer steel wire mesh concrete and 5 layers of Kevlar as blast-proof layer, the plastic deformation energy of the top plate can be reduced to 34.5% of the value of the top plate without any protective layer. When the combination of double layer steel wire mesh concrete and 10 layers of Kevlar as blast-proof layer is used as blast-proof layer, the value is 32.7%.

导出引用

李文武1，耿少波2，贺耀北1,3. 设防爆层钢箱梁缩尺结构抗近场爆炸作用试验研究[J]. 振动与冲击, 2022, 41(1): 46-51

LI Wenwu1, GENG Shaobo2, HE Yaobei1,3. Tests for near-field explosion resistance of steel box girder scale structure with anti-explosion layer[J]. Journal of Vibration and Shock, 2022, 41(1): 46-51

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