Earthquakes and Structures

  • 제9권3호
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  • Pages.639-656
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  • 2015
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effect of base isolation systems on increasing the resistance of structures subjected to progressive collapse

  • Tavakoli, Hamid R. (Department of Earthquake Engineering, Babol University and Technology) ;
  • Naghavi, Fahime (Department of Earthquake Engineering, Babol University and Technology) ;
  • Goltabar, Ali R. (Department of Earthquake Engineering, Babol University and Technology)
  • 투고 : 2014.02.16
  • 심사 : 2015.04.14
  • 발행 : 2015.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Seismic isolation devices are commonly used to mitigate damages caused by seismic responses of structures. More damages are created due to progressive collapse in structures. Therefore, evaluating the impact of the isolation systems to enhance progressive collapse-resisting capacity is very important. In this study, the effect of lead rubber bearing isolation system to increase the resistance of structures against progressive collapse was evaluated. Concrete moment resisting frames were used in both the fixed and base-isolated model structures. Then, progressive collapse-resisting capacity of frames was investigated using the push down nonlinear static analysis under gravity loads that specified in GSA guideline. Nonlinear dynamic analysis was performed to consider dynamic effects column removal under earthquake. The results of the push down analysis are highly dependent on location of removal column and floor number of buildings. Also, seismic isolation system does not play an effective role in increasing the progressive collapse-resisting capacities of structures under gravity loads. Base isolation helps to localize failures and prevented from spreading it to intact span under seismic loads.

키워드

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  9. Progressive collapse of regular- and irregular-plan concrete structures in an earthquake vol.174, pp.2, 2015, https://doi.org/10.1680/jstbu.18.00138
  10. Seismic poundings of multi-story buildings isolated by TFPB against moat walls vol.20, pp.3, 2021, https://doi.org/10.12989/eas.2021.20.3.295