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http://dx.doi.org/10.12989/eas.2020.19.2.103

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)
Publication Information
Earthquakes and Structures / v.19, no.2, 2020 , pp. 103-117 More about this Journal
Abstract
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.
Keywords
seismic base isolation; pebble layer; foundation size effect; shake-table study;
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Times Cited By KSCI : 10  (Citation Analysis)
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