EXTERNAL SUPPORT OF CONCRETE STRUCTURES USING COMPOSITE MATERIALS

The effects of externally wrapping concrete cylinders with composite materials have been investigated. Preliminary results demonstrated that wrapping with S-glass embedded in a polyester resin added strength and ductility to the cylinders. Additional tests using epoxy resins and Kevlar-29 fibers demonstrated that Kevlar fibers increase strength and ductility further (at higher cost). The experimental results showed that improvement in strength is dependent on sample size. In addition, the effects of environment on the properties of wrapped cylinders were investigated. The concern was degradation of the polymers and fibers and not the concrete. A series of tests was performed in which samples were exposed to salt spray for 28 days and to high temperature aging effects. These specimens showed no degradation of strength or ductility. A linear finite element model of a wrapped cylinder was created using I-DEAS. The stress distributions from the model are consistent with the cone type failure observed experimentally. The model also demonstrated the expected drop in concrete stress and a change in the relative distribution of stress as the number of layers increases.

  • Corporate Authors:

    University of Arizona, Tucson

    Department of Civil Engineering and Engineering Mechanics
    1209 E 2nd Street
    Tucson, AZ  United States  85721-0072
  • Authors:
    • Bavarian, B
    • Shively, J
    • Ehrgott, R
    • Di Julio, R
  • Conference:
  • Publication Date: 1996-1

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 917-928

Subject/Index Terms

Filing Info

  • Accession Number: 00762520
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 19 1999 12:00AM