Experimental Study of Friction‐Pendulum Isolation System
Publication: Journal of Structural Engineering
Volume 117, Issue 4
Abstract
A shake‐table study of the friction‐pendulum isolation system, installed in a six‐story, quarter‐scale, 52‐kip model structure, is presented. Two bearing materials are studied, one with a peak friction coefficient of 0.075 and another of 0.095. In both cases, the isolation system has a rigid‐body mode period of 1 sec. The isolated structure is found to be capable of withstanding strong earthquake forces of different frequency content. In tests with the El Centra motion, the isolated structure sustains, without any damage, a peak ground acceleration six times greater than what it could under fixed‐based conditions. It is found that the bearing displacements are low and that the permanent bearing displacements at the end of free vibration are very small, in general, not exceeding 6% of the bearing design displacement. The system is shown to have quantifiable properties, and analytical techniques are presented that provide accurate prediction of the response.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 117 • Issue 4 • April 1991
Pages: 1201 - 1217
Copyright
Copyright © 1991 ASCE.
History
Published online: Apr 1, 1991
Published in print: Apr 1991
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