SEISMIC RESPONSE OF IRREGULAR BUILDING ON SLOPING GROUND

The structure irregularities are considered as one of the main fundamentals of its failure. Structural frames having a combination of different irregularities as vertical, mass, stiffness, diaphragm, strength, torsional irregularity, etc. Also, for the analysis of this type of structure, it is necessary to carry out dynamic analysis to determine the maximum dynamic response of the building. Since it would be difficult to get the time history record for all the places, it is feasible to go with Response Spectrum Analysis. In this paper, a G+10 RCC Stepback building having each storey of height 3.6m with a horizontal angle of inclination 20°, 30°, 40º, and 45° on the sloping ground is analyzed in seismic zone V by Response Spectrum method for the purpose of commercial of people during a disaster with two of the top storey to be used for setup of machinery equipment which induces as Mass irregularity and ground to top of the storey at the edge of the planned building used as an opening for the purpose of natural lighting and stair which induces as Diaphragm irregularity. The analysis and modeling of the Stepback building are carried out by Etabs software as per IS 1893:2016 to compare the building based on their dynamic response properties like mode Period, Base Shear, Story deflection, Story drift, and story shear and also find out the frame vulnerability in irregularities of structure on the sloping ground.