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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Metal Spatial Structures

Stability and serviceability design for tilting footbridges supported by cable-arch systems

< Table of Contents for Metal Spatial Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Metal Spatial Structures
  • Pages: 8
  • Title: Stability and serviceability design for tilting footbridges supported by cable-arch systems
  • Author(s): Qilin Zhang, Xiaoqun Luo, Debao Li
  • Keywords: tilting footbridges, form-finding, overall stability, human-induced vibration
Abstract
This paper focuses on design considerations of a tilting footbridge supported by cable-arch systems. The parabolic steelarch spansabout 100 m between two hills and rises25 m above hill level. A curved transverse girder with width of 1.8m and rise of 20m is supported by the steel arch with cables. The tilting arch, the curved girder and cables are constructed as a self-balanced system. The key design issues on the superstructure of the bridge are included as follows: 1) a rational initial state of the bridge should be found to satisfy design requirements, including minimizing the requirement for bridge bases; 2) overall stability investigations, which include buckling analysis, elastic and elastoplastic limit state analyses, were performed to discuss the stability performances of the tilting cablearch systems; 3) because the structure is flexible and the vertical self-vibration frequency is below 3Hz, serviceability analysis under human excitations should be analyzed and vibration control cells of TMDs were equipped on the bridge, the effectiveness of vibration control were evaluated and discussed. Design suggestions were given at last for such bridge styles.

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