Vulnerability of bridges in extreme flood events based on element failure

Fraser, Carl (2015) Vulnerability of bridges in extreme flood events based on element failure. [USQ Project]


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The recent floods seen throughout Australia and especially Southeast Queensland in recent times have caused damage to occur to critical infrastructure. Bridges are included in the list of critical infrastructure as in a time of disaster, bridges provide access for emergency services to flood affect communities. A community has the potential to be isolated if a bridge crossing a river or creek is damaged by flooding. Therefore it is important to understand the affects that flooding has on bridges so that they can be made less vulnerable to damage from flooding.

To analyse the effects of flooding a finite element model of a case study bridge was created using the software package Strand7. The case study bridge was the Tenthill Creek Bridge which is located near Gatton in the Lockyer Valley. The flood loads determined by the Australian Standards were applied to this bridge. Damage to the bridge was also simulated by adding weakened elements to the main structural elements of the bridge. In order to compare different loads cases and damage scenarios performance indicators, found in the literature review, were used. These indicators were able to measure the reliability, vulnerability and robustness of the bridge. From the results it was found that a damaged girder section under log impact loading produced the maximum stress in the bridge.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of 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 Karunasena, Karu
Date Deposited: 06 Jun 2016 01:46
Last Modified: 06 Jun 2016 01:46
Uncontrolled Keywords: Natural Disasters, Bridges, Structural vulnerability
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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