Assessment of Seismic Performance in Buildings with Plan Irregularities

This study investigates the seismic behavior of reinforced concrete buildings with different types of vertical irregularities using Response Spectrum Analysis (RSA). Both regular and H-shaped plan irregular buildings were modeled, each with a footprint of 20x15 meters and a typical floor height of 3.2 meters, excluding the ground floor, for an 8-storey (G+7) structure. The seismic performance under a earthquake conditions was evaluated based on how stiffness, mass, and strength are distributed throughout the structure. The analysis compares plan-irregular building models featuring varying vertical irregularities. All models were analysed using STAAD.Pro V8i software.