Design of storey-isolation system in multi-storey building

Student: Luca Zanaica
Supervisors: Prof Michael N. Fardis

ABSTRACT:

Non-structural components are sensitive to large floor accelerations, velocities, and displacements. During an earthquake, the building can amplify its motion, resulting in peak floor accelerations higher than the peak ground acceleration. The survival of some particular non-structural components during an earthquake event can be fundamental. The use of base isolation is, at the moment, the best method to get at the same time interstorey drifts and floor accelerations reductions. New types of storey-isolation systems are here developed for a multi-storey reinforced concrete building. Non-linear time-history analyses are carried out in order to evaluate floor response spectra and real accelerations and displacements evolution during a ground motion. This work of research intends to demonstrate how an isolation system can be efficient even if it is localised onto a specific single storey level, evaluating its effectiveness for the global building in terms of PFAs, PFDs, and interstorey drift ratios reductions, and for the hypothetic isolated floor facilities in terms of peak accelerations cut.

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