Parametric Study Of Dynamic Analysis Of High-Rise Buildings With Outrigger Systems

Document Type : Primary Research paper


1 Post Graduate student, M.E. Infrastructure Engineering, PSG College of Technology, Coimbatore, India.

2 Assistant Professor,Department of Civil Engineering, PSG College of Technology, Coimbatore, India.


Design of tall buildings have their own challenges, right from resisting lateral loads due to wind and earthquake forces to huge construction costs. In order to reduce the lateral displacement of tall buildings, outriggers are employed. The optimal positioning of these outriggers at various levels of the building results in economic design. Rearranging those optimally positioned outriggers at the same level of the building further reduces the parameters like fundamental time period, drift, lateral displacements, etc. and result in further economic design of the building. Three models each of G+10, G+20, G+30 with ordinary moment resisting frame, special moment resisting frame, special moment resisting frame with outriggers are modeled, analysed and designed as per IS codes using ETABS 2016. Parameters like modal participation mass ratio, storey drifts, maximum lateral displacements against earthquake and wind, minimum base shear, soft storey, maximum to average displacement ratio are checked and brought under control as per Indian codes for lateral stability of the structures. Value engineering is performed on the structures and the final results are compared.