Optimization of Cable Forces of Completed Asymmetric Hybrid-Girder Cable-Stayed Bridge with Fish-Shuttle-Shaped Single Tower Based on Midas Civil

DOI

10.2991/978-94-6463-726-7_22How to use a DOI?

Keywords

hybrid-girder cable-stayed bridge; fish-shuttle-shaped tower; optimization of cable force; influence matrix method; finite element analysis

Abstract

The emergency of asymmetric hybrid-girder cable-stayed bridges with different shapes of main single tower brings numerous challenges to the analysis of cable forces of completed bridges. In this paper, based on an asymmetric hybrid-girder cable-stayed bridge with fish-shuttle-shaped single tower in China, the finite element software Midas Civil was adopted to build the model of the cable-stayed bridge. On the basis of the designed cable forces, the influence matrix method was used to optimize the cable forces of the completed cable-stayed bridge, and the reasonable completed bridge state was determined. The results indicated that the error of cable forces of the entire bridge was controlled within ±10%, namely, the cable-stayed bridge could reach a reasonable completed bridge state by adjusting the cable forces in a small range. In addition, it was practical to adopt influence matric method to optimize the completed bridge cable forces of asymmetric hybrid-girder cable-stayed bridge with fish-shuttle-shaped single tower, and the optimized cable forces was reasonable. The tendency of the bending moment of main girder under optimized cable forces was the same as that under designed cable forces, and the maximum positive and negative bending moments decreased by 49.84% and 27.35%, respectively. Compared with the designed cable forces, the maximum positive and negative displacements of the main girder and the maximum deviation displacement of the main tower along the bridge under optimized cable forces decreased by 76.33%, 39.20%, and 6.59%, respectively, leading to a smoother alignment of the main girder and tower. Compared with the designed cable forces, the support reaction forces were significantly reduced under the optimized cable forces, with a maximum reduction of 41.61%, which provided a larger pressure reserve to support and no negative reaction forces occurred. The optimized cable forces using the influence matrix method had obvious improvement effects on the bending moment, deformation and bearing force of the overall structure, which met the requirements of reasonable completed bridge state for cable-stayed bridges. The research results can provide reference for the optimization of cable forces in similar completed cable-stayed bridges.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Qiang Fan
AU  - Zhiyong Yang
AU  - Zheng Yang
AU  - Cheng Ma
AU  - Jian Wang
AU  - Jiankun Liu
PY  - 2025
DA  - 2025/06/13
TI  - Optimization of Cable Forces of Completed Asymmetric Hybrid-Girder Cable-Stayed Bridge with Fish-Shuttle-Shaped Single Tower Based on Midas Civil
BT  - Proceedings of the 2024 6th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2024)
PB  - Atlantis Press
SP  - 213
EP  - 227
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-726-7_22
DO  - 10.2991/978-94-6463-726-7_22
ID  - Fan2025
ER  -