Title:
FRP Repair Methods for FRP Repair Methods forUnreinforced Masonry Buildings Subject to Cyclic Loading
Author(s):
P.B. Foster, J. Gergely, D.T. Young,W.M. McGinley, and A. Corzo
Publication:
Symposium Paper
Volume:
230
Issue:
Appears on pages(s):
289-306
Keywords:
FRP; near surface mounted; repair; retrofit techniques;seismic loading; unreinforced masonry; wet lay-up
DOI:
10.14359/14838
Date:
10/1/2005
Abstract:
Unreinforced masonry building specimens were evaluated under cycliclateral loading. Various fiber reinforced polymer (FRP) composite configurations wereused to repair and retrofit the masonry structures. In the first phase, three differentcomposite systems were used to repair pre-damaged masonry structures. Thesesystems included: a wet lay-up woven glass fabric; a near surface mounted (NSM)extruded carbon FRP plate; and a glass FRP grid attached via a high elongationpolyurea resin. Retesting of the repaired structures revealed increases as much as700% in terms of energy dissipation and 300% in terms of pseudo-ductility. The secondphase involved retrofitting similar undamaged building specimens with FRP composites.Significant increases in strength, ductility and energy dissipation were observed. Theseismic performance of each structure was increased with the addition of a minimalamount of composite material as compared to the unreinforced structures.