Abstract
Abstract
The rising population density, particularly in the urban areas, increased the necessity to accommodate more people within the limited space constraints. The lack of ample space for horizontal expansion has triggered the requirement of tall structures. The increasing usage of superior strength and lightweight materials for the construction of high-rise structures renders it further flexible and lightly damped, thus rendering them extra sensitive towards dynamic excitations. Open Ground Storey (OGS) buildings are buildings where ground storey is kept open mainly for the purpose of parking vehicles. OGS buildings are featured by an abrupt decline in stiffness and strength in the ground storey, and are identified to have been repetitively exhibiting inferior performance during previous earthquakes all around the globe. The present paper focus on finding the seismic responses of a (G+35) structure with OGS with the nonlinear dynamic analysis and vibration control on the OGS structure using a tuned mass damper (TMD). TMDs with mass ratios of 1% to 10% in increments of 1% are considered in the study. The seismic performance of a regular (G+35) structure without open ground storey is also considered for comparison. The seismic responses of the building with OGS are found to be more than that of a regular building without OGS. TMD has been found to reduce the seismic responses of the OGS structure considered in this study. Also, TMD with higher mass ratio is found to offer better control effectiveness.