Numerical Modeling, Analysis and Structural Design of G+4 RC Building with Re-Entrant Corners

The architectural design of structures like schools, offices, and hotels often features asymmetry and plan irregularities, demanding careful consideration during seismic analysis and structural design. Re-entrant corners with certain conditions in a building are considered a horizontal irregularity by seismic codes such as IS 1893 (Part I):2002. This study focuses on the analysis and design of a multi-storey office building situated in Zone V with a re-entrant corner horizontal irregularity. It encompasses the preliminary design of structural components and seismic analysis using a numerical model based on IS 1893 (Part I):2002, implemented in ETABS v20.0.0. Key responses, including time period, modal mass participation ratios, and storey drift ratio, are assessed to ensure compliance with codal requirements. Following this, structural design for beams, columns, and slabs is executed, and the required longitudinal and transverse reinforcement in different locations of these components is compared across various floors.