Development and Validation of Steel Reinforced Polymer (SRP) for Strengthening of Transportation Infrastructures

This report presents the characterization, laboratory and field validation of steel reinforced polymer (SRP) and steel reinforced grout (SRG) strengthening materials for strengthening of transportation infrastructures. The new composite materials consist of steel cords formed by interwoven steel wires embedded within a polymer resin or cementitious grout matrix. The properties of SRP are evaluated experimentally and compared to micromechanical equations to determine the suitability of these equations for the prediction of material constants. Laboratory tests were undertaken on shallow reinforced concrete beams strengthened with SRP and SRG materials and comparing experimental results to identical reinforced concrete beams strengthened with fiber reinforced polymer, with equal amount of strengthening. All beams were tested in a four point bending configuration, constantly monitoring deflections, strain and crack width opening. A type of anchor system to retard complete peeling of SRP/SRG laminates has been investigated and results of its performance are presented. Based upon the promising results of the two previous test campaigns, a series of tests on prestressed concrete double-T real-scale beams strengthened with SRP materials was undertaken. The in-situ test campaign was made possible due to the demolition of an existing concrete structure. Tests consisted of a control beam, a beam strengthened with one ply of SRP and a third and last beam strengthened with two plies of SRP and by anchoring at both ends the plies with SRP U-wraps. All beams were tested in a three-point load configuration and were monitored at midspan for deflections as well as strains in the composite material.

  • Supplemental Notes:
    • This research was supported by a grant from the U.S. Department of Transportation, University Transportation Centers program.
  • Corporate Authors:

    University of Missouri, Rolla

    Center for Infrastructure Engineering Studies
    1870 Miner Circle Drive
    Rolla, MO  United States  65409

    Research and Special Programs Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Cassadei, Paolo
    • Nanni, Antonio
    • Ibell, Tim
  • Publication Date: 2005-6


  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 57p

Subject/Index Terms

Filing Info

  • Accession Number: 01005730
  • Record Type: Publication
  • Report/Paper Numbers: UTC R94, RG001232 OT094
  • Contract Numbers: DTRS98-G-0021 (Grant)
  • Files: UTC, TRIS, USDOT
  • Created Date: Oct 9 2005 1:49PM