Use of a Viscoelastic Model for the Seismic Response of Base-Isolated Buildings

[+] Author and Article Information
R. A. Uras

Reactor Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Building 208, Argonne, IL 60439

J. Pressure Vessel Technol 118(3), 374-383 (Aug 01, 1996) (10 pages) doi:10.1115/1.2842203 History: Received September 20, 1994; Revised January 02, 1996; Online February 11, 2008


Due to recent developments in elastomer technology, seismic isolation using elastomer bearings is rapidly becoming an acceptable design tool to enhance structural seismic margins and to protect people and equipment from earthquake damage. With proper design of isolators, high-energy seismic input motions can be transformed into low-frequency, low-energy harmonic motions, and the accelerations acting on the isolated building may be significantly reduced. Several alternatives exist for the modeling of the isolators. This study is concerned with the use of a viscoelastic model to predict the seismic response of base-isolated buildings. The in-house finite element computer code, SISEC has been modified to incorporate a viscoelastic spring element, and several simulations are performed. Then, the computed results have been compared with the corresponding observed data recorded at the test facility.

Copyright © 1996 by The American Society of Mechanical Engineers
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