NEHRP Clearinghouse

Title
Study of Seismic Isolation Systems for Computer Floors.
File
PB95138533.pdf
Author(s)
Lambrou, V.; Constantinou, M. C.
Source
National Science Foundation, Arlington, VA.; New York State Science and Technology Foundation, Albany., July 19, 1994, 211 p.
Identifying Number(s)
NCEER-94-0020
Abstract
The work described in this report concentrated on the development and testing of computer floor seismic isolation systems by utilizing devices of established effectiveness in the seismic isolation of buildings and shock isolation of military equipment. A computer floor system with raised floor and a generic slender equipment was constructed. It was isolated by spherically shaped sliding bearings and was highly damped either by utilizing high friction in the bearings or by installing fluid viscous dampers. The spherically shaped bearings provided the simplest means of achieving long period in the isolation system under low gravity load. The isolation system prevented rocking of the cabinet on top of the isolated floor and substantially reduced its acceleration response in comparison to that of a conventional computer floor. An analytical study was also conducted in order to extend the results to a range of parameters which could not be tested.
Keywords
; Floors; Dynamic response; Vibration isolators; Earthquake resistant structures; Seismic design; Commercial buildings; Computers; Vibration damping