HOW SAFE ARE OUR BRIDGES?

This article describes newly developed technology that focuses on a novel method to inspect suspension bridges. Vertical suspender cables are one of the most critical components for the stability of a suspension bridge. The cables that support the bridge are constantly exposed to load, vibration, and changing weather conditions, so deterioration is inevitable; wear, corrosion, and breakage occur on the internal wires of the cable and are not visible to the naked eye. The technology described here utilizes magnetic detection whereby a test instrument is installed at the bottom of a cable and is pulled up along its length. As the instrument travels upward, segments of the cable are magnetized and any damage, corrosion, or broken wires will cause a distortion of the magnetic field, which is then detected by a series of sensors. The instrument is highly sensitive, able to locate a metal loss as small as 0.2% of the entire cable.

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  • Corporate Authors:

    N/A

    P.O. Box 558
    Park Ridge, IL  United States  60068
  • Publication Date: 2000-7

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00796065
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 24 2000 12:00AM