Seismic Analysis of Re-Entrant Corner Plan Irregular Buildings with Roof Openings Using STAAD Pro: A Case Study for Zone III Earthquake Intensity

This research investigates the possibility of including roof openings in the re-entrant corner plan irregular buildings at different positions for the response to seismic loads. Five different models with different types and levels of diaphragm discontinuity were analyzed using the STAAD Pro software. Variables such as node displacement, storey shear X and Z directions, stress, and maximum bending moment were investigated to measure the efficiency of the structure. The findings reveal that models featuring heightened diaphragm discontinuity tend to exhibit amplified node displacements, storey shear, and stress levels. Particularly, Model M3, showcasing a 17% diaphragm discontinuity, consistently demonstrates superior performance by showcasing reduced displacements and stress values compared to its counterparts. However, it's imperative to note that the ultimate selection ofthe model should be contingent upon specific project requisites and design considerations. In essence, the study underscores the importance of considering the impact of roof openings and diaphragm discontinuity on the structural behavior of re-entrant corner plan irregular buildings under seismic loads. While Model M3 emerges as a promising candidate for its favorable performance metrics, the holistic evaluation should encompass project-specific factors to ensure an optimal structural solution. This research underscores the significance of comprehensively evaluating structural performance in irregular buildings with roof openings. While Model M3 exhibits notable advantages, including reduced displacements and stress levels, the complexity of real-world projects necessitates a nuanced approach, considering factors beyond purely numerical analysis, such as architectural constraints and functional requirements.