"Smart" Isolation for Seismic Control

摘要: Consideration of near-source, high velocity, long-period seismic pulses, as were recorded during the Northridge and Kobe earthquakes, has taught engineers researchers that ground motions due to such earthquakes can be difficult accommodate. This paper discusses a base isolation system using "smart" dampers, magnetorheological fluid adapt to, protect against, excitatiorn different characteristics. A linear, two degree-of-freedom, lumped-mass model base-isolated budding is used testbed for this study. Linear viscous dampers are shown have an optimal damping level several design achieve minimum peak accelerations. study family controllers smart damper find "optimal" over suite considered. further decreases drift compared linear without increasing accelerations imparted into superstructure. The most effective alternative broad class including near-source events.