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Experimental performance evaluation of an equipment isolation using MR dampers
Author(s) -
Fan YuCheng,
Loh ChinHsiung,
Yang Jann N.,
Lin PeiYang
Publication year - 2009
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.844
Subject(s) - damper , magnetorheological fluid , earthquake shaking table , engineering , vibration isolation , isolation (microbiology) , base isolation , vibration control , control system , structural engineering , automotive engineering , vibration , frame (networking) , mechanical engineering , electrical engineering , physics , microbiology and biotechnology , quantum mechanics , biology
Critical non‐structural equipments, including life‐saving equipment in hospitals, circuit breakers, computers, high technology instrumentations, etc., are vulnerable to strong earthquakes, and the failure of these equipments may result in a heavy economic loss. In this connection, innovative control systems and strategies are needed for their seismic protections. This paper presents the performance evaluation of passive and semi‐active control in the equipment isolation system for earthquake protection. Through shaking table tests of a 3‐story steel frame with equipment on the first floor, a magnetorheological (MR)‐damper together with a sliding friction pendulum isolation system is placed between the equipment and floor to reduce the vibration of the equipment. Various control algorithms are used for this semi‐active control studies, including the decentralized sliding mode control (DSMC) and LQR control. The passive‐on and passive‐off control of MR damper is used as a reference for the discussion on the control effectiveness. Copyright © 2008 John Wiley & Sons, Ltd.