Non-linear behaviour of base-isolated building supported on flexible soil under damaging earthquakes

Sayed Mahmoud; Per-Erik Austrell; Robert Jankowski

Non-linear behaviour of base-isolated building supported on flexible soil under damaging earthquakes

Abstrakt

Seismic isolation is a strategy to reduce damage of structures exposed to devastating earthquake excitations. Isolation systems, applied at the base of buildings, lower the fundamental frequency of the structure below the range of dominant frequencies of the ground motion as well as allow to dissipate more energy during structural vibrations. The effectiveness of the base-isolated buildings in damage reduction has been confirmed numerically for the models of structures with fixed supports. The aim of the present paper is to show the results of the non-linear analysis of the response of a base-isolated building supported on soft soil incorporating soil-structure interaction. The detailed study has been conducted for the building equipped with high damping rubber bearings used as isolation devices. The results of numerical simulations demonstrate that soil flexibility has a significant influence on the behaviour of isolated base of the structure. Considering the flexibility of soil significantly affects the rigid superstructure response lowering its potential to reduce structural damage.

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Kategoria:: Publikacja w czasopiśmie
Typ:: artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Opublikowano w:: Key Engineering Materials nr 488-489, strony 142 - 145,
ISSN: 1662-9795
Język:: angielski
Rok wydania:: 2011
Opis bibliograficzny:: Mahmoud S., Austrell P., Jankowski R.: Non-linear behaviour of base-isolated building supported on flexible soil under damaging earthquakes// Key Engineering Materials. -Vol. 488-489., (2011), s.142-145
Weryfikacja:: Politechnika Gdańska