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COMPARATIVE STUDY OF DIFFERENT TYPES OF BASE ISOLATORS IN MULTISTORIED BUILDING

  • Unique Paper ID: 167429
  • Volume: 11
  • Issue: 3
  • PageNo: 1144-1152
  • Abstract:
  • Base isolation (BI) is an effective strategy to protect building structures from earthquake damage. Placing isolators at the base of the building notably lengthens its natural period, which helps to mitigate resonance effects and enhance seismic performance. This research evaluates the efficiency of base isolation in both regular and irregular multi-story reinforced concrete (RC) frame buildings. A 15-story RC frame building was chosen for this study, and Time History analysis was conducted using STAAD PRO software version 2023. Lead Rubber Bearings (LRB), Natural Rubber Bearings (NRB), and a combination of NRB and LRB were designed based on the maximum gravity load on the base columns, and these designs were incorporated into the analysis. The results were compared in terms of natural period, base shear, story displacement, and story acceleration. The natural periods of base-isolated structures were observed to be longer compared to those of fixed-base structures. Isolators significantly reduced base shear and story acceleration in both the X and Y directions compared to fixed-base buildings, though the results varied with different types and combinations of isolators. When comparing base-isolated regular buildings to irregular ones (with re-entrant corners or vertical geometric irregularities), the irregular buildings showed better performance, with results differing depending on the type of base isolation employed.
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Cite This Article

  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 3
  • PageNo: 1144-1152

COMPARATIVE STUDY OF DIFFERENT TYPES OF BASE ISOLATORS IN MULTISTORIED BUILDING

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