Seismic Performance and Retrofitting of Open Ground Storey Buildings with Floating Columns
Floating columns, columns which rests on beams and does not have any foundation, are common in many of the multi storey buildings which are proposed to accommodate parking at ground floor or open halls. An attempt is made here to analyse the seismic performance of open ground storey buildings with floating columns and to suggest the best retrofitting method to strengthen the building. G+15 building models are considered for the study. Effect of position of floating column is also studied. 5 methods of retrofitting are compared to find out the best one among them. Analysis is done by using ETABS 2015 software. The results show that, lower the position of floating column, the worse is the response of building. From the study it has been found that infill walls can be used as the most effective retrofitting method to strengthen the floating column buildings. Keywords Floating column, Open ground storey, Retrofitting, Storey displacement