scholarly journals Numerical Simulation of a Subway Station Structure Subjected to Terrorism Bombing

2015 ◽  
Vol 9 (1) ◽  
pp. 688-692
Author(s):  
Qiushi Yan
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Dynamic Analysis ◽  
Blast Loading ◽  
Subway Station ◽  
Local Damage ◽  
Structure Dynamic ◽  
Important Means ◽  
Subway Stations ◽  
Station Structure

Subway stations are important means of transportation and main targets attacked by terrorists. In order to study the subway station response and damage subjected to blast loading, numerical simulation is carried out to estimate a subway station in beijing. An “explosive-air-structure ” dynamic interactive numerical model is built for the blast dynamic analysis of subway station subjected to blast. The patterns of damage about column are compared in different charges of explosive. The damages of concrete and reforcing bar in column are discussed. Although the column near the explosive is destoried under the charge of 30kg TNT, The calculations showns that it’s safe for the subway station to subject to blast loading under the charge of 30kg TNT. The local damage of column influence collapse of the station little. The dynamtic response of the structure is given to support the protection on the subway station against terrorism bombing.

scholarly journals Incremental dynamic analysis of underground subway station structure

2021 ◽  
Vol 293 ◽  
pp. 03007
Author(s):  
Tong Liu ◽  
Fuwang Xu ◽  
Qinghe Wang ◽  
Huaiyu Xu
Keyword(s):  
Dynamic Analysis ◽  
Seismic Vulnerability ◽  
Limit State ◽  
Incremental Dynamic Analysis ◽  
Analysis Procedure ◽  
Subway Station ◽  
Seismic Performance Evaluation ◽  
State Determination ◽  
Underground Subway Station ◽  
Station Structure

Incremental dynamic analysis constitutes the basis of seismic performance evaluation and seismic vulnerability assessment. In this paper, a typical two-story three-span subway station structure is selected as an example structure and its incremental dynamic analysis procedure are presented, including selection of ground motion, intensity measure and limit state determination. The incremental dynamic analysis procedure provided in this study can be a basis for further study on seismic design for underground structural systems.

Fragility analysis of a subway station structure by incremental dynamic analysis

2016 ◽  
Vol 20 (7) ◽  
pp. 1111-1124 ◽  
Author(s):  
Tong Liu ◽  
Zhiyi Chen ◽  
Yong Yuan ◽  
Xiaoyun Shao
Keyword(s):  
Dynamic Analysis ◽  
Earthquake Engineering ◽  
Seismic Vulnerability ◽  
Probabilistic Method ◽  
Incremental Dynamic Analysis ◽  
Seismic Intensity ◽  
Fragility Analysis ◽  
Subway Station ◽  
Limit States ◽  
Station Structure

Fragility analysis constitutes the basis in seismic risk assessment and performance-based earthquake engineering during which the probability of a structure response exceeding a certain limit state at a given seismic intensity is sought to relate seismic intensity and structural vulnerability. In this article, the seismic vulnerability assessment of a subway station structure is investigated using a probabilistic method. The Daikai subway station was selected as an example structure and its seismic responses are modeled according to the nonlinear incremental dynamic analysis procedure. The limit states are defined in terms of the deformation and waterproof performance of the subway station structure based on the central column drift angle and the structural tension damage distribution obtained from the incremental dynamic analysis. Fragility curves were developed at those limit states and the probability of exceedance at the limit states of operational, slight damage, life safety, and collapse prevention was determined for the two seismic hazard levels. Results reveal that the proposed fragility analysis implementation procedure to the subway station structure provides an effective and reliable seismic vulnerability analysis method, which is essential for these underground structural systems considering their high potential risk during seismic events.

Research on Dynamic Responses of Subway Stations to Explosive Loads

2011 ◽  
Vol 255-260 ◽  
pp. 1765-1769
Author(s):  
De Sen Kong ◽  
Wei Wei Zhang ◽  
Qiu Hua Zhang ◽  
Qing Hui Meng
Keyword(s):  
Shock Wave ◽  
Numerical Model ◽  
Dynamic Responses ◽  
Subway Station ◽  
Research Results ◽  
Internal Explosion ◽  
Subway Stations ◽  
Dense Crowd ◽  
Heavy Damage ◽  
Closed Environment

Subways have found wide application in many countries relying on their unique advantages. Urban subway stations usually have a dense crowd and a closed environment; therefore, once the terrorist blast attack occurs, people’s life and property security is seriously threatened. For the purpose of avoiding heavy damage (especially continuous collapse) of subway stations suffering from terrorist blast attack, numerical model of a subway station was established with the software LS-DYNA3D, and the internal explosion was analyzed and studied; subsequently, influential effect of blast shock wave on the subway station was obtained. The research results can provide basis for emergency countermeasures establishment of the subway structure coping with terrorist blast attack.

scholarly journals Seismic vulnerability assessment of multi-storey subway station structure

2021 ◽  
Vol 293 ◽  
pp. 02030
Author(s):  
Tong Liu ◽  
Zhixin Li ◽  
Qinghe Wang ◽  
Huaiyu Xu
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Vulnerability Assessment ◽  
Seismic Vulnerability ◽  
Incremental Dynamic Analysis ◽  
Seismic Intensity ◽  
Normal Operation ◽  
Subway Station ◽  
Seismic Vulnerability Assessment ◽  
Station Structure

The safety of underground structure under seismic load is an important basis of the normal operation of underground rail transit system. Structural seismic vulnerability assessment based on incremental dynamic analysis method can evaluate the probability of the structure exceeding a certain limit state under a specific seismic intensity in terms of probability. In this paper, the seismic vulnerability of a multi-storey subway station structure is evaluated using this method, and a two-dimensional finite element model of both soil and structure is established by finite element software ABAQUS. The vulnerability curve is obtained through incremental dynamic analysis and mathematical statistics. Based on this curve, the probabilities of the structure exceeding four seismic limit states are obtained under the design seismic intensity and the rarely occurred seismic intensity at 7 degree. Results show that this station may attain slight damage under design seismic intensity of 7 degree, and may attain life safety at the rarely occurred seismic intensity at 7 degree.

Design of Typical Subway Station Structure and its Enclosure with Open Cut Method in Chengdu City

2014 ◽  
Vol 501-504 ◽  
pp. 1711-1714
Author(s):  
Xiao Jun Zhou ◽  
Jing He Wang ◽  
Lu Lu Mao ◽  
Rui Guo
Keyword(s):  
Structural Design ◽  
Subway Station ◽  
Foundation Pit ◽  
Main Structure ◽  
Cut Method ◽  
Subway Stations ◽  
Typical Design ◽  
Station Structure

In consideration of the geology and hydrogeology of the strata in Chengdu city, and in view of the general depth of subway station, its main structure and retaining enclosure for foundation pit constructed with open cut method is generalized in this paper. In order to expound the design of subway station structure with open cut method, a typical design of subway station in Chengdu subway line 7 is illustrated in the paper. The design of open cut subway station structure and its enclosure in Chengdu is still summarized and can be used to guide the structural design of subway stations under similar conditions with open cut method (OCM).

Sign in / Sign up

Export Citation Format

Share Document