International Journal of Advanced Innovative Technology in Engineering (IJAITE)

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Comparative Study of Staircase at Different Location in Plan and Height of Building Considering Sesmic And Wind Effect

Parag Ashok Mandakmare, Prof. Hemant B Dahake

Abstract :

Staircases and elevator are one of the strongest transition elements in building they are designed to connect two spaces, whether it is interior to exterior or different interior levels. In many Multi-storey buildings staircase and elevator core wall are located at different positions as per the advantages of structure plan and user. It plays a vital role and changing the position of the stair case and core wall leads torsional irregularity in the plan regular building. Due to the change in position, torsion in a building occurs because of eccentricity in the mass and stiffness distributions and change the dynamic characteristic of regular plan building. Due to complex modeling of staircase, it is designed separately for non-seismic and seismic forces. But during earthquake as we construct the structure with staircase monolithically, staircase also contribute its performance to the building, due to this structural discontinuity, performance of buildings may result in non-linear behavior. In this paper, an attempt is made to understand the seismic behaviour of RC buildings with and without effect of staircase with changing position. Total Six models of G+5 storey and six models of G+11 storey RC buildings with different positions of staircase are considered. The modelling and analysis is done using ETABS 18 using seismic analysis and wind analysis and results of storey displacements, storey drift, time period, column and beam forces are discussed. From the results, it can be observed that building model with center position of staircase and shear wall performs better than other building model.

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