|Table of Contents|

Analysis on Progressive Collapse Resistance of Canopy Structure of High-speed Railway Station Based on Multi-scale Modeling(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年03期
Page:
92-100
Research Field:
Publishing date:

Info

Title:
Analysis on Progressive Collapse Resistance of Canopy Structure of High-speed Railway Station Based on Multi-scale Modeling
Author(s):
LIU Chuan-ping12 WU Yi-tao2 YANG Xing-ju1 QIU Lu1 LIN Feng1
(1. College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Tongji Architectural Design(Group)Co., Ltd., Shanghai 200092, China)
Keywords:
consistent multi-scale modeling canopy progressive collapse alternate path method explicit solution
PACS:
TU29
DOI:
10.19815/j.jace.2021.07060
Abstract:
The out-of-control train passing at high speed is one of the collapse risk sources of the canopy structure in the high-speed railway station. It is of great significance to analyze the progressive collapse resistance of the canopy structure. In order to balance the accuracy and efficiency of the finite element analysis, the consistent multi-scale finite element modeling method was applied, and the rationality and accuracy of this method applying to dynamic analysis of structural collapse were verified by the numerical example. Taking the two canopy structures of a high-speed railway station as examples, the area susceptible to the out-of-control trains was selected as the modeling area, and a multi-scale model was established using LS-DYNA. To investigate the progressive collapse resistance property of the canopy structures, the nonlinear dynamic behavior of residual structure after column removal was analyzed using alternate path method. The results show that for the steel roof canopy, the vertical displacement at the removal columns are 17.6, 13.1, 12.4 mm after removing the side column, reciprocal second column and middle column, associating with the rotation of their beam end of 0.001 5, 0.001 1, 0.001 1 rad respectively, which are all less than the limit value of 0.009 6 rad specified in the code. As a result, the structure does not collapse under the three scenarios of column removal. For the reinforced concrete roof canopy, after the removal of side column and reciprocal second column, the structure partially collapses. However, the collapse does not spread, resulting in no progressive collapse. After removing the middle column, the vertical displacement of the removal column is 88.6 mm, and the corresponding rotation of the beam end is 0.007 7 rad, which is far less than the limit value of 0.04 rad specified in the code and means no happening of collapse.

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Last Update: 2022-05-30