Susceptibility of the critical structural components of railway bridges to the changes in train speed

Aflatooni, Mehran, Chan, Tommy H.T., & Thambiratnam, David P. (2013) Susceptibility of the critical structural components of railway bridges to the changes in train speed. In Asia Pacific Vibration Conference, 2-6 June 2013, Jeju, Korea.

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Abstract

Modern trains with different axle configurations, speeds and loads are used in railway networks. As a result, one of the most important questions of the mangers involved in bridge managements systems (BMS) is how these changes affect the structural behavior of the critical components of the railway bridges. Although researchers have conducted, many investigations on the dynamic effects of the moving loads on bridges, the influence of the changes in the speed of the train on the demand by capacity ratios of the different critical components of the bridge have not yet been properly studied. This study is important, because different components with different capacities and roles for carrying loads in the structure may be affected differently. To investigate the above phenomenon in this research, a structural model of a simply supported bridge is developed. It will be verified that the dynamic behavior of this bridge is similar to a group of railway bridges in Australia. Demand by capacity ratios of the critical components of the bridge, when it is subjected to a train load with different speeds will be calculated. The results show that the effect of increase or decrease of speed should not be underestimated. The outcome is very significant as it is contrary to what is currently expected, i.e. by reducing the speed of the train, the demand by capacity ratio of components may increase and make the bridge unsafe for carrying live load.

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ID Code: 61990
Item Type: Conference Paper
Refereed: No
Keywords: Train Speeds, Axles Spacing, Criticality, Bridge Management System
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Infrastructure Engineering and Asset Management (090505)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: The original copyright of the paper belongs to the authors.
Deposited On: 22 Aug 2013 22:45
Last Modified: 15 Apr 2014 10:07

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