Deterioration of timber bridges using a Fault Tree Analysis

Wilson, Matthew (2016) Deterioration of timber bridges using a Fault Tree Analysis. [USQ Project]

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The Department of Transport and Main Roads within the Mackay/Whitsundays region has 62 timber bridges which have progressively deteriorated and are nearing the end of their operational life expectancy. The department is responsible for providing a safe and operational road network which includes the appropriate maintenance of these timber structures. It is expected that within the Mackay/Whitsunday region there is an annual expenditure of approximately 5 million dollars allocated to maintain and rehabilitate timber bridges, which highlights the need for effective and timely maintenance scheduling. This dissertation will identify the probability of conditional state of movement for each structural member of a timber bridge.

The probability of deterioration of these structures are indicative of the deterioration rate over 3 time periods (2, 3 and 5 years). Inspection reports are used for the foundation of the data to identify and track the movement paths for the different condition states. The movement of condition states are then subjected to probability methods (Markov Chain, Fault Tree Analysis) to depict the chance of a member changing condition states over that time period.

A Fault Tree Analysis (FTA) is utilised to investigate the probability over the given time period. The FTA was also used to depict the probability of movement from the timber bridge as a whole, the superstructure and substructure sections. The results indicated the probability of any structural member moving conditional states over the 3 time periods is indicative of the deterioration of timber bridges and this deterioration is indicative of the maintenance required to be performed. The (FTA) is in respect to the data collected within the Mackay/Whitsundays region and local weather/geological conditions, however this may differ depending on the location and conditions to which the timber is exposed.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours) Major Civil Engineering project
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Lokuge, Weena
Date Deposited: 24 Jul 2017 02:56
Last Modified: 24 Jul 2017 02:56
Uncontrolled Keywords: timber bridges; Fault Tree Analysis (FTA); deterioration; road network; maintain and rehabilitate; Department of Transport and Main Roads
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering

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