Comparative analysis of irregular RCC buildings in different zones

Abstract

The earthquake is the most devastating and unexpected natural phenomenon, causing massive damage to both human lives and infrastructure. In this study, two different irregulars Reinforced Cement Concrete (RCC) building plans of 25th story buildings with the ground floor (G+25) and 9th storey buildings with the ground floor (G+9) were subjected to four different zones making a total of eight model structures to test their ability to withstand gravity and seismic loads. The design was response spectrum method (RSM) then subjected to an earthquake load in accordance with Indian Standard (IS) 1893. The earthquake performance is evaluated on the basis of the structure’s design, serviceability, and earthquake power using an extended three-dimensional analysis of building systems (ETABS). The behaviour of building irregularities under seismic loading is investigated in this work. In this study, it has been compared the results in terms of max story displacement, max story drifts, and base shear. It was found that the model in zone 5 has maximum story displacements among all other models as well as higher max story drifts and base shears for both plans of G+9 and G+25. From the result, it was concluded that both the building models in the lower zone showed better performance in terms of max story displacement, max story drift, and base shear.