ABSTRACT

With the increasing demand for high-rise living and office spaces driven by population growth, multi-story structures have become a popular solution. However, ensuring the safety and stability of such large buildings, particularly in seismic zones, presents significant challenges. This study evaluates the seismic performance of G+20 office and residential structures with ground floors under various plan irregularities, focusing on maximizing structural stiffness and minimizing inter-storey displacements. 

Using STAAD Pro software, the seismic response of high-rise buildings in seismic zone 2 is analyzed through different structural configurations. The study examines key performance parameters, including lateral displacements, inter-storey drifts, and overall building stiffness, to understand the impact of plan irregularities on seismic behavior. The findings highlight how structural planning affects a building’s response to earthquake loads and offer actionable recommendations to improve stiffness and reduce displacements. By providing insights into the behavior of irregular configurations, this study aims to enhance the design and safety of multi-story structures in earthquake-prone regions.