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Vikash Kumar Sangadiya
Vinod Kumar Modi
Keywords:
Rubber bearing base isolation, High rise building, nonlinear time history.
Abstract:
This study evaluates seismic demands in symmetrical and asymmetrical reinforced concrete (RCC) buildings equipped with rubber base isolators. Using Non-Linear Time History Analysis (NLTHA), the research examines eight building models representing various configurations: four building heights (G+5, G+10, G+15, and G+20 stories) with both regular rectangular and irregular L-shaped floor plans, each analyzed with conventional fixed foundations and base isolation systems. The investigation utilizes ETABS 2020 software and "Bhuj" earthquake ground motion data to assess building performance in seismic zone IV. Results demonstrate that base isolators significantly reduce story drifts, with effectiveness varying by building height and symmetry - achieving an 8.23% reduction in symmetric five-story buildings compared to 83.75% in twenty-story structures. The isolators also substantially decrease base shear and torsional effects across all configurations. The findings indicate that rubber base isolators provide effective earthquake protection for both low-rise and high-rise buildings, with particularly strong performance in taller structures. This research supports wider implementation of base isolation technology in seismic regions, especially in India's zones 4 and 5, where they offer a cost- effective solution for reducing earthquake damage while minimizing post-event maintenance requirements.
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International Journal of Recent Research and Review
ISSN: 2277-8322
Vol. XVIII, Issue 1
March 2025
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PUBLISHED
March 2025
ISSUE
Vol. XVIII, Issue 1
SECTION
Articles
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