Studies on the RC Beam Strengthened by Using the Exterior-Wrapping U-Shaped Steel Plate and Its Application

Abstract

Basedonpracticalframestructures,constructionalmethodsofthereinforcedconcrete(RC)framebeamstrengthenedbyusingan exterior-wrappingU-shapedsteelplateareintroduced.Withreferencetothecodefordesignofstrengtheningconcretestructure,the bearing capacity formula of the RC frame beams strengthened by using the exterior-wrapping U-shaped steel plate is briefly derived.Afterthat,thefiniteelementanalysisoftheframebeambeforeandafterthereinforcementoftheengineeringexampleis carried outthrough ABAQUS software, and theresults of the analysis of the bearing capacityare comparedwith the calculation results of the theoretical formula. At the same time, through comparing and analysing the U-shaped steel plate strengthening methodandthe“anglesteel+battenplate”strengtheningmethod,theresultthattheRCbeamstrengthenedbyusingtheexteriorwrapping U-shaped steel plate has better mechanical performance is drawn. Finally, the application of the exterior-wrapping U-shaped steel plate strengthening method is rationally suggested.