IMPACT OF SEISMIC ZONES ON THE STRUCTURAL DESIGN OF HIGHRISE BUILDINGS FOR RECTANGULAR AND C-SECTION

Earthquakes induce vibrations in structures, causing motion in horizontal and vertical directions, with horizontal shaking being predominant. Proper consideration of lateral loads due to earthquakes is essential for designing earthquake-resistant reinforced concrete (RC) structures, especially high-rise buildings. This study analysesthe behaviour of a G+15 multi-storied RC building with a consistent story height of 3 meters, subjected to earthquake loads, using response spectrum analysis as per IS 1893 (Part-1): 2016. The seismic performance is evaluated for four seismic zones (II, III, IV, and V) using the ETABS software. Key parameters analysed include bending moment, shear force, lateral displacement, story shear, and story drift. Comparative results highlight the effects of varying seismic zone factors. The findings contribute to understanding structural behaviour under seismic conditions and optimizing designs for enhanced safety and performance in earthquake-prone regions. Keywords: Earthquake-resistant design, Seismic analysis, Response spectrum analysis, Reinforced concrete (RC) buildings, Seismic zones, ETABS, IS 1893 (Part-1): 2016.