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Seismic floor isolation is achieved by isolating a secondary floor system from the primary structural floor using horizontally flexible elements called isolators.
In this study, a multi-functional floor isolation system (FIS) that consists of several variable-stiffness sliding isolators, called polynomial friction pendulum isolators (PFPIs), is proposed and studied experimentally and numerically.
Compared to structural base isolation, floor isolation is a more cost-effective and efficient means for seismic protection of vibration-sensitive equipment in a building structure.
Floor isolation systems have been becoming increasingly popular as a protective measure for critical structural contents such as computer servers or museum artifacts.
Seismic floor isolation is a method for protecting nonstructural components, equipment and/or valuable building content in traditional fixed base buildings.
This study extends previously conducted research on suspended structural systems and floor isolation systems by introducing the analytical solution of buildings with suspended floor slabs with replaceable energy dissipation elements are numerically analyzed under dynamic excitations.
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The facility has been remodeled since then and now features state-of-the-art equipment, such as a digital X-ray machine, heated flooring, isolation areas and individual filtration systems in the pools.
Sheep were housed in paddocks and transferred to cement floored isolation buildings for parturition.
The obtained numerical results highlight the drastic reduction of considered floor accelerations as the base isolation major effect.
However, previous research on base isolation shows that this additional damping may also be detrimental, as inter-storey drifts and floor accelerations may increase.
Some are kept on the top floor in isolation cells.
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