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Advances in Civil Engineering
Volume 2018, Article ID 3293506, 13 pages
https://doi.org/10.1155/2018/3293506
Research Article

Progressive Collapse Analysis of Latticed Telecommunication Towers under Wind Loads

1Postdoctoral Station of Civil Engineering, Chongqing University, Chongqing 400030, China
2Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, China
3School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710123, China

Correspondence should be addressed to Shan Gao; nc.ude.tih@nahsoag

Received 22 August 2017; Revised 24 October 2017; Accepted 1 November 2017; Published 24 January 2018

Academic Editor: John Mander

Copyright © 2018 Shan Gao and Sheliang Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

As the antenna-supporting structures, latticed telecommunication steel towers are considered as critical members of telecommunication infrastructures. It is necessary to perform progressive collapse analysis of lattice telecommunication towers under wind loads. The present study conducts a nonlinear dynamic analysis on 50 m high typical standard latticed telecommunication tripole tower and angle tower by alternative load path method. The finite element models for two towers subjected to design wind loads are developed by ABAQUS. The analysis results show that, for 50 m high standard tripole tower, the member failure in the first three tower sections from tower top would not trigger the collapse of the tower. From the fourth tower section to tower bottom, the member failure at certain wind direction may cause a collapse. For 50 m high standard angle tower, the single member failure in any tower section would not cause the collapse of the tower. A dynamic sensitivity index is proposed to identify the most unfavorable wind direction for tripole tower and angle tower. A progressive collapse fragile curve based on collapse probability of telecommunication tower under wind loads is proposed to assess the anticollapse performance of the towers.