International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Structural Effects of Partially Earth-anchored Cable System on Medium-span Cable-stayed Bridges

Won, Jeong-Hun;Park, Se-Jun;Yoon, Ji-Hyun;Kim, Sang-Hyo

  • Published : 2008.09.10
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Abstract

The aim of this study is to examine the structural effects of the partially earth-anchored cable system on cable-stayed bridges with medium main span length (between 150 and 500 m). It is assumed that the system, originally introduced as a means of reducing excessive axial force in the girder of long-span cable-stayed bridges, can be applied to medium-span cable-stayed bridges. By simulating two types of three-span cable-stayed bridges, one with the self-anchored cable system and the other with the partially earth-anchored cable system, advantages and disadvantages of the partially earth-anchored cable system are estimated. The system enhances structural behaviors for the axial force in the girder, the bending moment in the pylon, and the uplifting force at the bearing. Also, partially earth-anchored cable stayed bridges with the various numbers of earth-anchored cables are analyzed by a parametric study. The major considerations in determining the optimal proportion of earth-anchored cables is recommended.

Keywords

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