Innovative Monitoring Techniques on the Cables of Cable-Stayed Bridges (I)−Considering Guide-Pipe Constraint on Cables

This paper describes how, around the deck and the pylon of a cable-stayed bridge there are two-to-three-meter-long guide-pipes that protect the cable tendons. With a rubber damper inside, the guide-pipes reduce the vibration induced by wind, stem the flow of rain into anchors, and therefore increase the service life-span of the anchor system. However, from the viewpoint of the cable structure, the guide-pipe constrain the free length of the cables and they affect the natural frequencies of the cables so that the engineers tend to overestimate or underestimate the true cable force by any theories or models without considering the guide-pipe effect. To illustrate the cable force analysis considering guide-pipe constraint on cables, this paper apply wireless sensing technology to measure the frequency spectrum and the fundamental mode shape of a cable. After the measurement work, through the finite element method (FEM) inverse calculation process, the effective constraint imposed by guide-pipes and the precise cable force are quantitatively analyzed.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lee, Zheng-Kuan
  • Chen, Chien-Chou
  • Loh, Chin-Hsiung
  • Chang, Kuo-Chen
  • Lin, Pei-Yang
• Conference:
  • Fourth International Workshop on Seismic Design and Retrofit of Transportation Facilities
  • Location: San Francisco CA, United States
  • Date: 2006-3-13 to 2006-3-14
• Publication Date: 2006-4-3

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: 11p
• Monograph Title: Proceedings of the Fourth International Workshop on Seismic Design and Retrofit of Transportation Facilities

Subject/Index Terms

• TRT Terms: Anchorages; Bridge design; Cable stayed bridges; Finite element method; Monitoring; Pipe; Service life; Tendons; Vibration; Wind
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01079478
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Oct 22 2007 10:14AM