Abstract

Due to the distinctive advantages such as high strength to weight ratio, high resistance to corrosion and chemical attacks, fiber reinforced polymer (FRP) sheets are widely used for strengthening and repairing of existing steel structures. In last two decades, study has been carried out over the use of FRP for strengthening and repairing of concrete structures. More recently, the use of FRP to strengthen existing steel structures has received much attention. Strengthening and retrofitting is necessary for steel structure after some time because durability and capacity of steel structure get reduced over the time .Conventional strengthening method such as welding of additional steel plate to existing structure result in increase in dead load , also it will undergo corrosion if strengthen structure is placed in corrosive environment. Use of FRP for strengthening and retrofitting of steel structure will be the excellent solution for these disadvantages. The main aim of this paper is to study the flexural behavior of artificially degraded steel I section externally bonded with GFRP, BFRP, and CFRP.

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