Dynamic analysis of subway station subjected to internal blast loading  

作　　者：何伟 陈健云 郭靖 

机构地区：[1]School of Civil and Hydraulic Engineering,Dalian University of Technology [2]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology

出　　处：《Journal of Central South University》2011年第3期917-924,共8页中南大学学报（英文版）

基　　金：Project(50978043) supported by the National Natural Science Foundation of China

摘　　要：The study was motivated by the fact that explosion inside the subway structure may not only cause direct life loss,but also damage the subway structure and lead to further loss of lives and properties.The propagation law of explosion wave in the subway station was analyzed and a simplified model of overpressure in the subway station was also proposed.Whereafter,the improved dynamic cam-clay model of soil and the concrete damaged plasticity constitutive model were used for the dynamic analysis of the subway station.Meanwhile,the influences of soil stiffness and burial depth on the dynamic response of the subway station were looked into.The results show that the multi-peak overpressure in the subway station does not appear,and large stresses concentrate on the central column and the floor slab of the subway station,so some special reinforcement measures should be taken in these parts.The effect of soil stiffness and burial depth on the stress of the central column is little;however,the effect on the stress of the station side wall is relatively obvious.The study was motivated by the fact that explosion inside the subway structure may not only cause direct life loss, but also damage the subway structure and lead to further loss of lives and properties. The propagation law of explosion wave in the subway station was analyzed and a simplified model of overpressure in the subway station was also proposed. Whereafter, the improved dynamic cam-clay model of soil and the concrete damaged plasticity constitutive model were used for the dynamic analysis of the subway station. Meanwhile, the influences of soil stiffness and burial depth on the dynamic response of the subway station were looked into. The results show that the multi-peak overpressure in the subway station does not appear, and large stresses concentrate on the central column and the floor slab of the subway station, so some special reinforcement measures should be taken in these parts. The effect of soil stiffness and burial depth on the stress of the central column is little; however, the effect on the stress of the station side wall is relatively obvious.

关 键 词：subway station intemal explosion nonlinear dynamic analysis influence factor 

分 类 号：U231.4[交通运输工程—道路与铁道工程]