DOI: 10.5176/2301-394X_ACE15.57
Authors: Dr. M. Abushagur
Abstract:
Aging and deterioration of existing steel structures necessitate the development of simple and efficient rehabilitation techniques. The current study investigates a methodology to enhance the flexural capacity of steel beams by bonding Glass Fiber Reinforced Plastic (GFRP) sheets to their flanges. A heavy duty adhesive, tested in a previous study is used to bond the steel and the GFRP sheet. In addition to its ease of application, the GFRP sheet provides a protective layer that prevents future corrosion of the steel section. The study reports the results of bending test conducted on a W-shaped steel beam before and after rehabilitation using GFRP sheets. Enhancement in the moment capacity of the beam due to bonding GFRP sheet is determined of the test results. A closed form analytical model that can predict the yield moment as well as the stress induced in the adhesive and the GFRP sheets of rehabilitated steel beam is developed. A detailed finite element analysis for the tested specimens is also conducted in this paper. The shear and peel stiffness of the adhesive are modeled as equivalent linear spring systems.
Keywords: Rehabilitation, GFRP, enhance the flexural capacity of steel beams
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