Earthquakes and Structures

  • 제19권2호
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  • Pages.103-117
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  • 2020
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Foundation size effect on the efficiency of seismic base isolation using a layer of stone pebbles

  • Banovic, Ivan (University of Split, Faculty of Civil Engineering, Architecture and Geodesy) ;
  • Radnic, Jure (University of Split, Faculty of Civil Engineering, Architecture and Geodesy) ;
  • Grgic, Nikola (University of Split, Faculty of Civil Engineering, Architecture and Geodesy)
  • 투고 : 2020.01.06
  • 심사 : 2020.08.06
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

The effect of the foundation size on the efficiency of seismic base isolation using a layer of stone pebbles is experimentally investigated. Four scaled models of buildings with different stiffnesses (from very stiff to soft) were tested, each with the so-called small and large foundation, and exposed to four different accelerograms (different predominant periods and durations). Tests were conducted so that the strains in the model remained elastic and afterwards the models were tested until collapse. Each model was tested for the case of the foundation being supported on a rigid base and on an aseismic layer. Compared to the smaller foundation, the larger foundation results in a reduced rocking effect, higher earthquake forces and lower bearing capacity of the tested models, with respectable efficiency (reduced strain/stress, displacement and increase of the ultimate bearing capacity of the model) for the considered seismic base isolation compared to the foundation on a rigid base.

키워드

과제정보

This work has been fully supported by the Croatian Science Foundation under the project "Seismic base isolation of a building by using natural materials - shake table testing and numerical modelling" [IP-06-2016-5325]. The work of doctoral student Ivan Banović has been fully supported by the "Young researchers' career development project - training of doctoral students" of the Croatian Science Foundation funded by the European Union from the European Social Fund. The authors are grateful for the support.

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