Prestressed Concrete Girder Repair with CFRP Post-Tensioned Rods


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Prestressed Concrete Girder Repair with CFRP Post-Tensioned Rods

Author(s): Clayton A. Burningham, Chris P. Pantelides, and Lawrence D. Reaveley

Publication: Special Publication

Volume: 275


Appears on pages(s): 1-20

Keywords: CFRP, post-tensioning, prestressing, concrete beams, repair, retrofit

Date: 3/1/2011

This paper presents research that uses novel clamp anchors and a simple mechanical stressing device for post-tensioning carbon FRP (CFRP) composite rods. The CFRP system was used in the repair of prestressed and normal reinforced concrete beams controlled by flexural and shear failure, respectively. The scaled specimens were designed to simulate concrete bridge girders with two different types of field-observed damage—end cracking and damage to internal steel prestressing tendons caused from vehicle collision. The CFRP repair system increased the ultimate strength and proved to be a practical and feasible method of repairing concrete girders with reduced shear or flexural capacity.