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Structural robustness of long-span cable-supported bridges segmented by zipper-stoppers to prevent progressive collapse
Publikationstyp
Conference Paper
Date Issued
2018
Sprache
English
Author(s)
Starossek, Uwe
Institut
TORE-URI
Start Page
593
End Page
600
Citation
IABSE Conference, Kuala Lumpur, Engineering the Developing World : 593-600 (2018)
Contribution to Conference
Scopus ID
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.