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Responses of self-anchored suspension bridge to sudden breakage of hangers

  • Qiu, Wenliang (School of civil engineering, Dalian University of Technology) ;
  • Jiang, Meng (School of civil engineering, Dalian University of Technology) ;
  • Zhang, Zhe (School of civil engineering, Dalian University of Technology)
  • Received : 2012.11.18
  • Accepted : 2014.03.04
  • Published : 2014.04.25

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 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 a concrete self-anchored suspension bridge to sudden breakage of hangers are studied in this paper. The results show that the sudden breakage of a hanger has significant effects on tensions of the hangers next to the broken hanger, bending and torsion moments of the girder, moments of the towers and reaction forces of the bearings. The results obtained from dynamic analysis method are very different from those obtained from static analysis method. The maximum tension of hanger produced by breakage of a hanger exceeds 2.2 times of its initial value, the maximum dynamic amplification factor reaches 2.54, which is larger than the value of 2.0 recommended for cable-stayed bridge in PTI codes. If two adjacent hangers on the same side of bridge break one after another, the maximum tension of other hangers exceeds 3.0 times of its initial value. If the safety factor adopted to design hanger is too small, or the hangers have been exposed to corrosion, the bridge may collapse due to breakage of two adjacent hangers.

Keywords

References

  1. Cai, J.G., Xu, Y.X., Zhuang, L.P., Peng J. and Zhang J. (2012), "Comparison of various procedures for progressive collapse analysis of cable-stayed bridges", Zhejiang Univ-Sci A (Appl Phys & Eng), 13(5), 323-334.3. https://doi.org/10.1631/jzus.A1100296
  2. Kao, C.S., Kou, C. H., Qiu, W.L. and Tsai, J.L. (2012), "Ultimate load-bearing capacity of self-anchored suspension bridges", J. Marine Sci. Tech., 20(1), 18-25.
  3. Ministry of Transport of P.R. China (2002), Design specifications for highway suspension bridge, P.R. China. (In Chinese)
  4. Mozos, C.M. and Aparicio, A.C. (2010a), "Parametric study on the dynamic response of cable stayed bridges to the sudden failure of a stay, Part I: Bending moment acting on the deck", Eng. Struct., 32, 3288-3300. https://doi.org/10.1016/j.engstruct.2010.07.003
  5. Mozos, C.M. and Aparicio, A.C. (2010b), "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 stays", Eng. Struct., 32, 3301-3312. https://doi.org/10.1016/j.engstruct.2010.07.002
  6. Mozos, C.M. and Aparicio, A.C. (2011), "Numerical and experimental study on the interaction cable structure during the failure of a stay in a cable stayed bridge", Eng. Struct., 33, 1330-2341.
  7. Qu, Z.L., Shi, X.F., Li, X.X. and Ruan, X. (2009), "Research on Dynamic Simulation Methodology for Cable Loss of Cable Stayed Bridges", Struct. Eng., 25(6), 89-92. (in Chinese)
  8. Qiu, W.L., Jiang, M. and Zhang, Z. (2009), "Study on influencing factors of ultimate load-carrying capacity of self-anchored concrete suspension bridge", J. Harbin Inst. Tech., 41(8), 128-131. (in Chinese)
  9. Post-Tensioning Institute (PTI) (2007), Recommendations for stay cable design, USA.
  10. Ruiz-Teran, A.M. and Aparicio, A.C. (2007), "Dynamic amplification factors in cable-stayed structures", J. Sound Vib., 300, 197-216 https://doi.org/10.1016/j.jsv.2006.07.028
  11. Ruiz-Teran, A.M. and Aparicio, A.C. (2009), "Response of under-deck cable-stayed bridges to the accidental breakage of stay cables", Eng. Struct., 31, 1425-1434. https://doi.org/10.1016/j.engstruct.2009.02.027
  12. Wang, L.L. and Yi, W.J. (2007), "Cases analysis on cable corrosion of cable-stayed bridges", Centr. South Highw. Eng., 32(1), 94-32. (in Chinese)
  13. Wolff, M. and Starossek, U. (2008), "Robustness assessment of a cable-stayed bridge", Proceedings of the 4th International Conference on Bridge Maintenance, Safety and Management, 690-696.
  14. Wolff, M. and Starossek, U. (2010), "Cable-loss analyses and collapse behavior of cable-stayed bridges", Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management, 2171-2178.
  15. Zhang, Z., Teng, Q.J. and Qiu, W.L. (2006), "Recent concrete self-anchored suspension bridge in China", Proceedings of the Institute of Civil Engineers: Bridge Engineering, 195, 169-177.

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