Title:
Retrofitting of Concrete Structures for Shear and Flexure with Fiber-Reinforced Polymers
Author(s):
Shamim A. Sheikh, David DeRose, and Jamil Mardukhi
Publication:
Structural Journal
Volume:
99
Issue:
4
Appears on pages(s):
451-459
Keywords:
fibers; flexure; polymer; shear
DOI:
10.14359/12114
Date:
7/1/2002
Abstract:
Damage sustained by foundation walls and large beams in a building was simulated in full-size to near-full-scale model specimens in the laboratory. The damaged specimens were repaired with carbon and glass fiber-reinforced polymer (CFRP and GFRP) sheets and wraps, and tested to failure. Companion control specimens were also tested to failure without rehabilitation to provide a basis for comparison and evaluate the effectiveness of the repair techniques. Test results showed that fiber-reinforced polymers (FRPs) were effective in strengthening for flexure as well as shear. Over-reinforcing in flexure resulted in shifting the failure to shear mode, which in some cases may be undesirable. Strengthening of a member in shear, on the other hand, resulted in increasing the ultimate displacement by more than tenfold, and toughness by a factor of more than 26. Available analytical procedures and building code provisions were found to simulate the behavior of specimens retrofitted with FRP reasonably well.