Analysis of bridge failure due to Cyclone Marcia in Central Queensland using fault tree method

Pathiranage, Thilini (2015) Analysis of bridge failure due to Cyclone Marcia in Central Queensland using fault tree method. [USQ Project]

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Abstract

Over the past few years Queensland has suffered from a number of severe tropical cyclones, the most recent one being Marcia, that took place on 20th of February 2015. Damage bill of Marcia exceeded $50 million which included cost of repairing a number of damaged bridges. Failure of road infrastructure isolates communities from accessing essential services and commodities. This necessitated an urgent need to develop a systematic method of assessing the failure of the bridge component to improve the resilience of future bridges and provide base knowledge for developing emergency maintenance response. There are several methods available to investigate the bridge failure. Fault tree analysis (FTA) was selected considering its positive attributes over other methods. FTA was used to estimate the probabilities of failure of main components (Super Structure and Sub Structure) and elements of timber and concrete bridges. Secondary data (Level 1 and level 2 bridge inspection reports from the department of transport and main roads) before and after the cyclone Marcia were used in conjunction with expert consultations to construct fault trees for both timber and concrete bridges. Results indicated potential failure mechanisms and the degree of susceptibility of main components of timber and concrete bridges to cyclonic events. However, the extent of the data was not adequate to draw firm conclusions and further studies (i.e. probabilistic models) are recommended to strengthen the understanding of the complete dynamics of the bridge failure under cyclonic event.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Civil) project
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Supervisors: Lokuge, Weena
Date Deposited: 07 Jun 2016 04:16
Last Modified: 07 Jun 2016 04:16
Uncontrolled Keywords: bridge failure, cyclone Marcia, Queensland, fault tree method, potential failure mechanisms, timber bridge, concrete bridges
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090599 Civil Engineering not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/29283

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