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Spatial combined cable element for cable-supported bridges

Jiandong Wei (School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, China)
Manyu Guan (School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, China)
Qi Cao (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, China)
Ruibin Wang (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 7 January 2019

Issue publication date: 8 February 2019

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Abstract

Purpose

The purpose of this paper is to analyze the cable-supported bridges more efficiently by building the finite element model with the spatial combined cable element.

Design/methodology/approach

The spatial combined cable element with rigid arms and elastic segments was derived. By using the analytical solution of the elastic catenary to establish the flexibility matrix at the end of the cable segment and adding it to the flexibility matrix at the ends of the two elastic segments, the flexibility matrix at the end of the cable body is obtained. Then the stiffness matrix of the cable body is established and the end force vector of cable body is given. Using the displacement transformation relationship between the two ends of the rigid arm, the stiffness matrix of the combined cable element is derived. By assigning zero to the length of the elastic segment(s) or/and the rigid arm(s), many subdivisions of the combined cable element can be obtained, even the elastic catenary element.

Findings

The examples in this field and specially designed examples proved the correctness of the proposed spatial combined cable element.

Originality/value

The combined cable element proposed in this study can be used for the design and analysis of cable-stayed bridges. Case studies show that it is able to simulate cable accurately and could also be used to simulate the suspenders in arch bridges as well in suspension bridges.

Keywords

Acknowledgements

The authors would like to acknowledge the financial support provided by the Natural Science Foundation of Liaoning Province (Project No. 20170540168), and the Fundamental Research Funds for the Central Universities (Project No.DUT17JC02).

Citation

Wei, J., Guan, M., Cao, Q. and Wang, R. (2019), "Spatial combined cable element for cable-supported bridges", Engineering Computations, Vol. 36 No. 1, pp. 204-225. https://doi.org/10.1108/EC-05-2018-0243

Publisher

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Emerald Publishing Limited

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