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Progressive Collapse of Post-Tensioned Box Girder Bridges under Blast Loads Using Applied Element Method
Post-tensioned box girder bridges are considered one of the most structurally efficient bridge systems and are widely used in the U.S. This study investigates numerical results of progressive collapse for post-tensioned box girder bridges under blast loads. Limited data is published on this topic; however there is available literature on the analysis of the progressive collapse of cable-stayed bridges under blast loads. Accidental detonations are assumed to take place under the bridge deck. Numerical simulation is conducted using the Applied Element Method implemented in "Extreme Loading for Structures" software. The numerical model of the bridge structure and simulation results of the main bridge components, piers, and main span deck are investigated. The parameter studied was in terms of the weight of the explosion at two different locations simulating a large vehicle bomb (LVB) placed underneath the bridge. The progressive collapse analyses of the bridge structure after damage in either one of the two main bridge components are investigated. Damage mechanism and severity in the bridge pier, and deck are examined. Numerical results presented in this study could help departments of transportation and engineers and owners of similar bridges to determine appropriate measures for bridge protection against possible explosion threats.
Progressive Collapse of Post-Tensioned Box Girder Bridges under Blast Loads Using Applied Element Method
Post-tensioned box girder bridges are considered one of the most structurally efficient bridge systems and are widely used in the U.S. This study investigates numerical results of progressive collapse for post-tensioned box girder bridges under blast loads. Limited data is published on this topic; however there is available literature on the analysis of the progressive collapse of cable-stayed bridges under blast loads. Accidental detonations are assumed to take place under the bridge deck. Numerical simulation is conducted using the Applied Element Method implemented in "Extreme Loading for Structures" software. The numerical model of the bridge structure and simulation results of the main bridge components, piers, and main span deck are investigated. The parameter studied was in terms of the weight of the explosion at two different locations simulating a large vehicle bomb (LVB) placed underneath the bridge. The progressive collapse analyses of the bridge structure after damage in either one of the two main bridge components are investigated. Damage mechanism and severity in the bridge pier, and deck are examined. Numerical results presented in this study could help departments of transportation and engineers and owners of similar bridges to determine appropriate measures for bridge protection against possible explosion threats.
Progressive Collapse of Post-Tensioned Box Girder Bridges under Blast Loads Using Applied Element Method
Ibarhim, Ahmed (author) / Salim, Hani (author) / Rahman, Nabil A. (author)
Structures Congress 2012 ; 2012 ; Chicago, Illinois, United States
Structures Congress 2012 ; 2291-2300
2012-03-29
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2012
| Springer Verlag | 2022
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| British Library Conference Proceedings | 1990