ASSESMENT OF SEISMIC PERFORMANCE FOR G+5 MULTI-STOREY BUILDING WITH BRACINGS AT DIFFERENT STORIES

The main aim of this paper is to identify the type of bracing for the better seismic performance of the structure by building steel bracings at different floor levels.Duringearthquakes the human loss is mainly due to the failure of structures. Seismic deficitstructures will crumble even at low magnitude earthquakes.Many existing structures need to be retrofitted,installation of steel bracing for existing structure will be easiest way instead of buildingshear walls.Steel tubular X-bracing system have been installed to the strcuture at different floor levels for choosen G+5 RCC building and analyzed by Non-linear static push over analysis.Six cases are considered in this study, in each case the placement of bracing were changed to find out the better performane of the structue with variation in the placement of bracings at different storey levels.The comparisions made between these six cases by keeping base model as ideal model along with the parameters like base shear,displacement and inter-storey drift.After comparing it was found that there is a significant increase of Base Shear by 14.90%,16.53% for case-3,case-5 models respectively when compared with basemodel i.e. case-1with out bracing. The displacement is reduced by 17.39%, 17.39% for case-3 and case-5models respectively when compared with base model. There is a reduction of inter-storey drift by 33.33%, 33.33% for case-3 and case-5 models respectively when compared with base model. Case-3 and case-5 braced frames has been significantly performed well with the reduction in storey drifts and displacements and increase in base shear