预制多仓管廊在爆炸作用下的连续坍塌分析
首发时间:2019-11-08
摘要:针对综合管廊在可能燃气爆炸下的坍塌问题,建立多仓综合管廊结构的三维有限元模型,分析了不同浓度燃气爆炸对管廊顶板、中墙以及侧墙的损坏情况,讨论了爆炸作用后管廊的坍塌风险分析。结果表明,随着燃气泄漏时间的增长,燃气爆炸产生的超压会对管廊结构产生严重破坏,当燃气泄漏量达到30kg后,管廊顶板会因为中隔墙失去支撑能力,从而在覆土及上部车辆荷载的压力下发生坍塌。
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Continuous Collapse Analysis of Prefabricated Multi-storage Underground Pipe Gallery under Explosion
Abstract:Aiming at the collapse of the underground pipe gallery under the possible explosion, the three-dimensional finite element model of the multi-tank underground pipe gallery structure was established. The damage of the ceiling, the middle wall and the side wall of the underground pipe gallery with different concentrations of gas explosion was analyzed. The results show that with the increase of gas leakage time, the overpressure caused by gas explosion will cause serious damage to the structure of the pipe corridor. When the gas leakage reaches 30kg, the roof of the pipe gallery will lose support due to the middle wall, thus covering the soil and Collapse under the pressure of the upper vehicle load.
Keywords: kunderground pipe gallery gas warehouse explosion Continuous collapse dynamic response
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