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Determination of reasonable finished state of self-anchored suspension bridges

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Abstract

A systematic and generic procedure for the determination of the reasonable finished state of self-anchored suspension bridges is proposed, the realization of which is mainly through adjustment of the hanger tensions. The initial hanger tensions are first obtained through an iterative analysis by combining the girder-tower-only finite element (FE) model with the analytical program for shape finding of the spatial cable system. These initial hanger tensions, together with the corresponding cable coordinates and internal forces, are then included into the FE model of the total bridge system, the nonlinear analysis of which involves the optimization technique. Calculations are repeated until the optimization algorithm converges to the most optimal hanger tensions (i.e. the desired reasonable finished bridge state). The “temperature rigid arm” is introduced to offset the unavoidable initial deformations of the girder and tower, which are due to the huge axial forces originated from the main cable. Moreover, by changing the stiffness coefficient K in the girder-tower-only FE model, the stiffness proportion of the main girder, the tower or the cable subsystem in the whole structural system could be adjusted according to the design intentions. The effectiveness of the proposed method is examined and demonstrated by one simple tutorial example and one self-anchored suspension bridge.

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Authors and Affiliations

  1. College of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, China

    Jian-hui Li  (李建慧)

  2. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY, 10027, USA

    Dong-ming Feng  (冯东明)

  3. College of Civil Engineering, Southeast University, Nanjing, 210096, China

    Ai-qun Li  (李爱群)

  4. College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China

    Hui-hui Yuan  (袁辉辉)

Authors
  1. Jian-hui Li  (李建慧)
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  2. Dong-ming Feng  (冯东明)
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  3. Ai-qun Li  (李爱群)
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  4. Hui-hui Yuan  (袁辉辉)
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Corresponding author

Correspondence to Dong-ming Feng  (冯东明).

Additional information

Foundation item: Project(20133204120015) supported by Specialized Research Fund for the Doctoral Program of Higher Education of China; Project(12KJB560003) supported by the Natural Science Foundation of the Higher Education Institution of Jiangsu Province, China

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Li, Jh., Feng, Dm., Li, Aq. et al. Determination of reasonable finished state of self-anchored suspension bridges. J. Cent. South Univ. 23, 209–219 (2016). https://doi.org/10.1007/s11771-016-3064-6

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  • DOI: https://doi.org/10.1007/s11771-016-3064-6

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