Tests for surface loading of high pile steel pipe column under shallow water explosion
ZHUANG Tieshuan1,2, WANG Mingyang1, WU Jun2, ZHANG Tao2, YANG Chengyu2, YAN Minhua2
1.State Key Lab of Disaster Prevention and Mitigation of Explosion and Impact, The Army Engineering Institute of PLA, Nanjing 210007, China;
2.Institute of Defense Engineering, AMS, PLA, Luoyang 471023, China
Abstract：Taking a steel pipe column of high pile as the study object, underwater explosion model tests were conducted under different conditions including different explosive quantities, explosion distances and detonation depths. Characteristics and spatial distributions of explosion pressure on steel pipe column surface under shallow water explosion were studied. Effects of proportional explosion distances on peak value of shock wave and spatial distribution were analyzed. Reflection coefficient, diffraction one of steel pipe column surface shock wave and the engineering calculation method for actual shock wave acting on the column surface in anti-blast design were deduced. The study results showed that under action of underwater explosion, reflection shock wave and diffraction one act almost simultaneously on steel pipe column surface, and their peaks are non-uniformly distributed in direction of pipe column height; free water surface has less effects on shock wave, but it has larger effects on the secondary bubble pulsation; peak values of reflection and diffraction shock waves increase with increase in explosive quantities and decrease in explosion distances; if proportional explosion distance and reflection shock wave peak value keep unchanged, diffraction shock wave peak value is smaller when explosive quantities and explosion distance are smaller; steel pipe column surface’s shock wave reflection coefficient and diffraction one decrease with increase in proportional explosion distances; when proportional explosion distance is greater than 1.71, the actual shock wave acting on steel pipe column surface can be calculated approximately according to 1.37 times of free field shock wave peak value.
庄铁栓1,2，王明洋1，伍俊2，张涛2，杨程宇2，闫民华2. 浅水爆炸下高桩钢管柱表面作用荷载实验研究[J]. 振动与冲击, 2020, 39(1): 70-78.
ZHUANG Tieshuan1,2, WANG Mingyang1, WU Jun2, ZHANG Tao2, YANG Chengyu2, YAN Minhua2. Tests for surface loading of high pile steel pipe column under shallow water explosion. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 70-78.
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