Experimental Dynamics of a Bridge Deck Isolated with Rolling Pendulum System (RPS)
Résumé
Base isolation of building structures represents the most important
technique used worldwide at this moment. An innovative isolation system is
presented in this article, whose passive type operating principle is based
on rolling of spherical pieces on concave surface part. The isolation
system is composed of two main plates and a spherical steel piece is
interposed between. Spherical part is the piece that makes disconnection
between foundation and superstructure, being able to roll on a concave
surface. The disconnection between foundation and superstructure is
essential so that ground movements as results of seismic actions are
filtered and efforts that may request the structure are much lower in value.
An experiment was performed in which a scaled bridge deck structure type
was isolated with four isolation systems, in order to observe the behavior
of the structure during a seismic action. The experimental results obtained
are presented for acceleration in time and frequency, for the three main
directions of movement.
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- 2013 fascicula14 nr2 [11]