Comparative Seismic Analysis of Multi-storied Building with and Without Floating Columns: Fid-Bau Portal

Comparative Seismic Analysis of Multi-storied Building with and Without Floating Columns

Thakur, Arvind / Khatun, Amreen

In present construction scenario of multi-storey buildings for residential and commercial uses where occupancy rate is higher requires a wide space or areas for parking vehicles at the ground level. Construction of columns nearly spaced from each other in the parking area may lead to structural irregularities and failure of the buildings. To avoid failures comprises from such undesirable construction irregularities the concept of floating columns has been introduced. Floating columns are generally constructed for the supportive purpose and structural appearance of the buildings. In present study the comparative analysis has been made using STAAD Pro software for multi-storied buildings constructed with and without floating columns. In this study a G+7 multi-storey building is considered with and without floating column are analysed and seismic prone area for the comparative seismic analysis zone IV is taken. In this study behaviour of both the buildings with and without floating column is analysed and concluded from the study that buildings constructed with undesirable structural irregularities experiences more shaking and damage during seismic vibrations. Present study indicates 56.6% storey displacement at the top floor, Study of peak storey shear concludes higher percentage of 17.4% base shear at top floor and decreased to 0.4% at first floor as the mass of the building decreased, Time History Analysis indicates lesser value of time period (0.37 s) after changing dimensions of structural members as compare to the time period observed in building with floating columns and without floating columns also the value of storey drift increased to 48.09% in the top floor of building considered with an application of floating column.