Structural robustness of long-span cable-supported bridges segmented by zipper-stoppers to prevent progressive collapse
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Détails bibliographiques
| Auteur(s): |
Mohammad Shoghijavan
(Hamburg University of Technology, Structural Analysis and Steel Structures Institute, Hamburg, Germany)
Uwe Starossek 
(Hamburg University of Technology, Structural Analysis and Steel Structures Institute, Hamburg, Germany)
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| Médium: | papier de conférence | ||||
| Langue(s): | anglais | ||||
| Conférence: | IABSE Conference: Engineering the Developing World, Kuala Lumpur, Malaysia, 25-27 April 2018 | ||||
| Publié dans: | IABSE Conference Kuala Lumpur 2018 | ||||
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| Page(s): | 593-600 | ||||
| Nombre total de pages (du PDF): | 8 | ||||
| DOI: | 10.2749/kualalumpur.2018.0593 | ||||
| Abstrait: |
This paper investigates the structural behaviour of a long-span cable-supported bridge segmented by zipper-stoppers after the sudden rupture of some of its cables. Increasing the robustness of the structural system through segmentation is a possible approach to prevent progressive collapse in bridges due to cable failure. In this concept, zipper-stoppers, at the segment borders, are strong components with the multiple of the load bearing capacity of usual members and are designed to arrest a zipper-like collapse in the segment where the initial damage occurred. For finding the “stress increase ratio” of the zipper-stopper, an analytical approach based on differential equations of the system will be used. Then, an approximation function for a simplified bridge model in a cable-loss scenario will be derived. The proposed approximation function has been checked by numerical models, and its good accuracy has been proven. |
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