Earthquakes and Structures

  • 제26권2호
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  • Pages.131-147
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  • 2024
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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Strengthening sequence based on relative weightage of members in global damage for gravity load designed buildings

  • Niharika Talyan (International Institute of Information Technology Hyderabad, Earthquake Engineering Research Center) ;
  • Pradeep K. Ramancharla (International Institute of Information Technology Hyderabad, Earthquake Engineering Research Center)
  • 투고 : 2023.10.05
  • 심사 : 2024.01.09
  • 발행 : 2024.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

Damage caused by an earthquake depends on not just the intensity of an earthquake but also the region-specific construction practices. Past earthquakes in Asian countries have highlighted inadequate construction practices, which caused huge life and property losses, indicating the severe need to strengthen existing structures. Strengthening activities shall be proposed as per the proposed weighting factors, first at the higher weighted members to increase the capacity of the building immediately and thereafter, the other members. Through this study on gravity load-designed (GLD) buildings, relative weights are assigned to each storey and exterior and interior columns within a storey based on their contribution to the energy dissipation capacity of the building. The numerical study is conducted on mid-rise archetype GLD buildings, i.e., 4, 6, 8, and 10 stories with variable storey heights, in the high seismic zones. Non-linear static analysis is performed to compute weights based on energy dissipation capacities. The results obtained are verified with the non-linear time history analysis of 4 GLD buildings. It was observed that exterior columns have higher weightage in the energy dissipation capacity of the building than interior columns up to a certain building height. The damage in stories is distributed in a convex to concave parabolic shape from bottom to top as building height increases, and the maxima location of the parabola shifts from bottom to middle stories. Relative weighting factors are assigned as per the damage contribution. And the sequence for strengthening activities is proposed as per the computed weighting factors in descending order for regular RCC buildings. Therefore, proposals made in the study would increase the efficacy of strengthening activities.

키워드

과제정보

The financial support for this research is done by the International Institute of Information Technology (IIIT) Hyderabad, India, under student grant aid.

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