Method for Determining Anti-slip Safety Factors Between Main Cable and Saddle in Suspension Bridge

Qing Hua Zhang, Zhen Yu Cheng, Dong Lin Jia, Yi Bao

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

To precisely evaluate the anti-slip safety between the main cable and the saddle and guarantee the structure safety of multi-pylon suspension bridge, characteristics of the frictional resistance between the main cable and the saddle were investigated. The differential equation between lateral pressure and tension force of strands was established by analyzing the stress-strain relation of micro-body between strands. Meanwhile, a frictional resistance equation between the main cable and the saddle was established based on the lateral pressure expression. The method for determining anti-slip safety factors between the main cable and the saddle was proposed. The frictional resistance equation was validated by results of the model test. Moreover, determination methods of anti-slip safety factor as well as the influence of saddle design parameters on the anti-slip safety factor were discussed. The results indicate that the actual frictional resistance between the main cable and the saddle can be precisely determined by the proposed frictional resistance equation for the saddle with or without vertical friction plate. The existing way of defining anti-slip safety factor with ambiguous physical meaning and conservative values can't consider the influence of optimized saddle parameters on the improvement of anti-slip safety. These problems obstruct the overall design of the multi-pylon suspension bridge. The anti-slip safety factor expression with clearer physical significance is convenient for engineering application and can be taken as the major basis for determining anti-slip safety factor. The coefficients of friction between the main cable and the saddle as well as the saddle design parameters influence the frictional resistance to some extent. It is effective to improve the anti-slip safety through optimal saddle design parameters and the installation of vertical friction plates.

Original languageEnglish
Pages (from-to)41-49
Number of pages9
JournalZhongguo Gonglu Xuebao/China Journal of Highway and Transport
Volume30
Issue number7
StatePublished - 1 Jul 2017

Keywords

  • Anti-slip safety factor
  • Bridge engineering
  • Frictional resistance equation
  • Multi-pylon suspension bridge
  • Saddle

Fingerprint

Dive into the research topics of 'Method for Determining Anti-slip Safety Factors Between Main Cable and Saddle in Suspension Bridge'. Together they form a unique fingerprint.

Cite this