Retrofitting of Earthquake damaged R.C.C Structure using various Retrofitting techniques.

The aim of this study is to retrofit an earthquake damaged structure using different materials. The structure is named as model A which is 5 storey’s. Model A was designed for gravity loads but when analyzed for seismic loads using STADD Pro v8i, columns of ground storey failed which means the structure cannot withstand future earthquakes. The loading of the building is kept the same, but it is retrofitted using 3 materials that are steel, concrete, fibre reinforced polymer. Nomenclature of building is done as when bracing is done in middle columns of all exterior portion of building it is termed as MODEL ‘B’ as shown in figure .When steel bracing is provided in all edges of building as shown in figure it is termed as MODEL ‘C’, when bracing is provided central columns of building in XY direction, and in corner in YZ direction it is termed as MODEL ‘D’ as shown in figure. Three types of steel bracing are used: ISMC 225, ISMC 350, and ISMC 300. 11 models were analyzed, 9 for steel bracing, 1 for FRP plate, 1 for concrete jacketing. The displacements, Storey drift, axial forces were compared between original structure and retrofitted model.