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Nonlinear Analysis of Spatial Cable of Long-Span Cable-Stayed Bridge considering Rigid Connection

  • Structural Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

To determine the cable sag effect and solve the rigid connection problem at cable ends of a long-span cable-stayed bridge, a two-node spatial catenary cable element with arbitrary rigid arms is developed. Using the finite rotation formula of the space vector and a differential method, the incremental relation between displacement and force at both ends of the rigid arm is given. Then, explicit expression of the tangent stiffness matrix of the element with arbitrary rigid arms is derived based on the catenary equations. Two numerical examples are provided to verify the validity of the new element. A long-span cable-stayed bridge application model is established, and the cables are simulated using three methods. The results show that the rigid end effect has influence on displacements, bending moments and rigidity and should not be ignored. The catenary cable element with arbitrary rigid arms can be used to simulate the geometric nonlinear mechanical behavior of the cables and can well solve the rigid connection problem.

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Zhiqiang Wu & Jun Wei

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  1. Zhiqiang Wu
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  2. Jun Wei
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Correspondence to Zhiqiang Wu.

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Wu, Z., Wei, J. Nonlinear Analysis of Spatial Cable of Long-Span Cable-Stayed Bridge considering Rigid Connection. KSCE J Civ Eng 23, 2148–2157 (2019). https://doi.org/10.1007/s12205-019-0071-9

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  • DOI: https://doi.org/10.1007/s12205-019-0071-9

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