Abstract
As the subway station space is closed and the passenger flow is large, subway explosion-proof has always been the focus of station safety personnel. Here we built typical two-story and two-span underground stations model by using LS-DYNA. Through ALE algorithm and fluid structure coupling method, propagation law of shock wave in subway station and damage state of station structures were analyzed in the case of 16.3 kg TNT explosion. It is found that the shock wave mainly propagates along the lateral direction of the station after the superposition and attenuation of the surrounding structures. The maximum displacements of supporting columns, subway stairways, hallway flooring and platform flooring are 1.34 mm, 16.83 mm, 5.354 mm and 112.8 mm respectively. And the overall structure of the station is complete, but local areas are damaged and collapsed. In addition, in order to strengthen the antidetonation stability of subway station structure, the joint of column and platform floor, the joint of column and station hall floor and the reinforcement of stairs should be considered. This paper mainly provides a theoretical basis for the explosion-proof design of station structure.
Published Version
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