Parametric Study on Responses of a Self-Anchored Suspension Bridge to Sudden Breakage of a Hanger
Open Access
- 1 January 2014
- journal article
- research article
- Published by Hindawi Limited in The Scientific World Journal
- Vol. 2014, 1-10
- https://doi.org/10.1155/2014/512120
Abstract
The girder of self-anchored suspension bridge is subjected to large compression force applied by main cables. So, serious damage of the girder due to breakage of hangers may cause the collapse of the whole bridge. With the time increasing, the hangers may break suddenly for their resistance capacities decrease due to corrosion. Using nonlinear static and dynamic analysis methods and adopting 3D finite element model, the responses of an actual self-anchored suspension bridge to sudden breakage of hangers are studied in this paper. The results show that the sudden breakage of a hanger causes violent vibration and large changes in internal forces of the bridge. In the process of the vibration, the maximum tension of hanger produced by breakage of a hanger exceeds 2.22 times its initial value, and the reaction forces of the bearings increase by more than 1.86 times the tension of the broken hanger. Based on the actual bridge, the influences of some factors including flexural stiffness of girder, torsion stiffness of girder, flexural stiffness of main cable, weight of girder, weight of main cable, span to sag ratio of main cable, distance of hangers, span length, and breakage time of hanger on the dynamic responses are studied in detail, and the influencing extent of the factors is presented.Keywords
Funding Information
- National Natural Science Foundation of China (NSFC-51178080)
This publication has 8 references indexed in Scilit:
- Time-Progressive Dynamic Assessment of Abrupt Cable-Breakage Events on Cable-Stayed BridgesJournal of Bridge Engineering, 2014
- Comparison of various procedures for progressive collapse analysis of cable-stayed bridgesJournal of Zhejiang University-SCIENCE A, 2012
- Numerical and experimental study on the interaction cable structure during the failure of a stay in a cable stayed bridgeEngineering Structures, 2011
- Parametric study on the dynamic response of cable stayed bridges to the sudden failure of a stay, Part II: Bending moment acting on the pylons and stress on the staysEngineering Structures, 2010
- Parametric study on the dynamic response of cable stayed bridges to the sudden failure of a stay, Part I: Bending moment acting on the deckEngineering Structures, 2010
- Response of under-deck cable-stayed bridges to the accidental breakage of stay cablesEngineering Structures, 2009
- Dynamic amplification factors in cable-stayed structuresJournal of Sound and Vibration, 2007
- Decision-support tools and the indigenous paradigmEngineering Sustainability, 2006