FRICTIONAL NON ROCKING SEISMIC BASE ISOLATOR FOR STRUCTURE SEISMIC PROTECTION (FNSI)

摘要

Frictional Non Rocking Seismic Base Isolator For Structure Seismic Protection (FNSI) is a seismic protection isolator installed under foundations or columns of a building or other structure.;FNSI separates a building or other structures from ground seismic motions and passes slight fraction of seismic forces to the superstructures so that the superstructure protected from earthquake induced damages.;FNSI consists of three main parts, a Sliding Hammer fixed into ground, a Rotating Anvil, RA, and a Hook fixed to the superstructure, wherein contacted moving surfaces are so smooth for effective isolation.;Seismic motions shake the sliding hammer which imitates ground motions and causes RA to rotate around center of the Hook convex or concave, and to simultaneously vibrate in vertical direction. RA movements cause the isolated superstructure to move vertically and slightly horizontally where the vertical vibrations can be accommodated by increase in material strength when responding to short term loading.