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By: Rushikesh P. Deshmukh and R. S. Londhe
ABSTRACT – This research investigates the seismic performance of a 15-storey reinforced concrete building with varying shear wall configurations, focusing on the effects of vertical and staggered openings. The study compares three models: one with solid shear walls, one with vertical openings, and one with staggered openings. Using ETABS V21 software and performing the analysis in Seismic Zone IV under the Response Spectrum Method (IS 1893:2016), the results show that solid shear walls offer the best seismic performance, with minimal displacement, drift, and shear. The models with openings exhibited higher displacements and reduced stiffness, with staggered openings performing slightly better than solid shear wall (without opening). This research highlights the importance of optimized shear wall designs to enhance the seismic resilience of multi-storey buildings.
The results of the analysis indicate that the model with solid shear walls demonstrates superior seismic performance, exhibiting the lowest values of displacement, drift, and base shear. This confirms the effectiveness of uninterrupted shear walls in enhancing the overall stability and stiffness of multi-storey buildings during seismic events. In contrast, the models incorporating openings—both vertical and staggered—showed increased displacements and reduced stiffness, highlighting the detrimental effects of discontinuities in the shear wall system. Interestingly, among the two types of openings, the model with staggered openings performed marginally better than the one with vertical openings, suggesting that the distribution and arrangement of openings can influence the seismic response. This research underscores the critical importance of optimizing shear wall design, particularly when openings are unavoidable due to architectural or service requirements. By carefully considering the size, location, and pattern of openings, engineers can mitigate adverse effects and enhance the seismic resilience of multi-storey RC buildings. The findings provide valuable insights for structural designers aiming to balance functional needs with safety and performance in earthquake-prone regions.
Citation:
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