The Sliding Isolation Pendulum For The
Seismic Protection Of Buildings
Author(s)
P. Huber & R. Medeot
Abstract
The Sliding Isolation Pendulum (SIP) is a new seismic isolator that can be
ideally derived from a conventional PTFE spherical sliding bearing in which the
flat surface that accommodates translation movements has been substituted by a
concave sliding surface. This important, albeit simple modification, transforms a
structural bearing into a perfect seismic isolator providing all necessary functions
of a seismic isolation system for a building. Besides the adoption of the curved
sliding surface, the Sliding Isolation Pendulum differs from a conventional PTFE
spherical sliding bearing in its use of a new elasto-plastic sliding material and
certain design details that translate into an enhanced level of performance. This
paper illustrates the innovative aspects that distinguish the Sliding Isolation
Pendulum from other existing similar devices, the substantial advantages it can
accrue vis-à-vis previously used technologies, as well as the practical
applications.
Keywords: seismic isolator, seismic hardware, sliding pendulum, Friction
Pendulum, seismic protection.
1 Introduction
In 1970 the Company Kreutz/Germany invented and patented the spherical
bearing (Fig. 1, left) to accommodate relative rotations and displacements
effectively with the sliding couple PTFE (Teflon) against stainless steel.
Based on the principles of the spherical bearing, in 1988 the Friction
Pendulum bearing was invented by Victor Zayas [1]. Ideally, the Friction
Pendulum can be derived from a spherical bearing in which the flat surface that
accommodates translation movements has been substituted by a curved surface
(Fig. 1, right).
Keywords
seismic isolator, seismic hardware, sliding pendulum, Friction
Pendulum, seismic protection.
Related Book
Other papers in this volume
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