Structural Engineering and Mechanics

  • 제50권2호
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  • Pages.241-255
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  • 2014
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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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)
  • 투고 : 2012.11.18
  • 심사 : 2014.03.04
  • 발행 : 2014.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

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피인용 문헌

  1. Self-Anchored Suspension Bridges in China vol.22, pp.1, 2017, https://doi.org/10.1061/(ASCE)SC.1943-5576.0000304
  2. Dynamic response analysis for submerged floating tunnel with anchor-cables subjected to sudden cable breakage vol.59, 2018, https://doi.org/10.1016/j.marstruc.2018.01.009
  3. Behaviour and design of three-tower, self-anchored suspension bridge with a concrete girder vol.172, pp.3, 2014, https://doi.org/10.1680/jbren.18.00023
  4. Effect of Load Cases and Hanger-Loss Scenarios on Dynamic Responses of the Self-Anchored Suspension Bridge to Abrupt Rupture of Hangers vol.34, pp.5, 2014, https://doi.org/10.1061/(asce)cf.1943-5509.0001482
  5. Dynamic Response and Robustness Evaluation of Cable-Supported Arch Bridges Subjected to Cable Breaking vol.2021, pp.None, 2014, https://doi.org/10.1155/2021/6689630