Comparative Structural Analysis and Design of Regular and Irregular G+20 Reinforced Concrete Buildings Using STAAD Pro

This study investigates the seismic performance of reinforced cement concrete (RCC) G+20 multi-storey framed structures with both regular and irregular plan configurations constructed on sloping terrain. The buildings are modeled and analyzed using STAAD.Pro, employing equivalent static analysis to assess their response under seismic loading. The primary objective is to evaluate the influence of plan geometry on structural response and to determine the effectiveness of shear walls in enhancing lateral load resistance. Comparative assessment between regular and irregular configurations focuses on key seismic parameters, including lateral displacement, base shear, and bending moments in beams and columns. The role of shear walls in improving seismic stability, particularly for structures located on inclined ground, is also examined. The findings provide meaningful insights into the importance of structural configuration and lateral force–resisting systems in mitigating earthquake-induced damage and improving the overall safety of multi-storey buildings.