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Advanced Composite Stay Cables
Author(s) and Affiliation(s):
Markus Wernli and Frieder Seible Department of Structural Engineering University of California, San Diego, La Jolla, CA
Principal Investigator:
Frieder Seible
Advanced Research Projects Agency
Research Start Date:
September 1994
Expected Completion Date:
Research Objectives:
Stay cables are the main structural elements of cable stayed bridges. Unlike many other bridge types, these components are completely exposed to environmental conditions. It is thus of general interest to make such cables as corrosion resistant as possible. Advanced composites such as carbon or aramid fiber reinforced plastics offer properties like high specific strength and stiffness, and high fatigue and corrosion resistance. They can be an excellent alternative to conventional steel by extending service life, reducing maintenance and simplifying installation. Furthermore, due to the light weight, high strength and high stiffness, they allow the construction of more efficient long-span bridges. This research is part of the Advanced Composite Cable Stayed Bridge Project at the University of California, San Diego. The scope of research is to assess the mechanical behavior of composite cables, with a focus on the short- and long-term performance of the anchorages, which are the key components of a cable system.
Expected Products or Deliverables:
The research (1) will show the state of the art of composite cable systems and their performance; (2) will be a source to establish guidelines for the use of composite stay cables; (3) the long term test will be a valuable reference which will increase the confidence on the use of advanced composites in infrastructure; and (4) the program should help to increase the efficiency and performance of cable components with respect to the right choice of material, geometry and anchor type.

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