Performance of Double-T Prestressed Concrete Beams Strengthened with Steel Reinforced Polymer

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Title: Performance of Double-T Prestressed Concrete Beams Strengthened with Steel Reinforced Polymer

Author(s): P. Casadei, A. Nanni, T. Alkhrdaji, and J. Thomas

Publication: Special Publication

Volume: 230

Issue:

Appears on pages(s): 763-778

Keywords: double-T beams; ductility; flexure; in-situ load test;prestressed concrete; steel reinforced polymer; strengthening

Date: 10/1/2005

Abstract:
In the fall of 2002, a two story parking garage in Bloomington, Indiana, builtwith precast prestrestressed concrete (PC) double-T beams, was decommissioned dueto a need for increased parking-space. This led to the opportunity of investigating theflexural performance of the PC double-T beams, upgraded in the positive momentregion with steel reinforced polymer (SRP) composite materials, representing the firstcase study where this material has been applied in the field. SRP makes use of high-strength steel cords embedded in an epoxy resin. This paper reports on the test resultsto failure of three beams: a control specimen, a beam strengthened with one ply of SRPand a third beam strengthened with two plies of SRP anchored at both ends with SRP U-wraps. Results showed that SRP can significantly improve both flexural capacity andenhance pseudo-ductility.