Effects of Large Cumulative Travel on the Behavior of Lead-Rubber Seismic Isolation Bearings
Publication: Journal of Structural Engineering
Volume 136, Issue 5
Abstract
Lead-rubber bearings are seismic isolators that have been used extensively to protect buildings, bridges, and mission-critical infrastructure from the damaging effects of earthquake shaking. In bridges, lead-rubber bearings are subjected to continuous movement due to service (traffic) and temperature effects. This paper presents data on the effects of cumulative travel on the mechanical properties of lead-rubber bearings based on an experimental investigation of both medium- and small-sized bearings. A theoretical interpretation of the test results is presented.
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Acknowledgments
Financial support for this work was provided by the State of California Department of Transportation (Project UNSPECIFIED65A0174) and the Multidisciplinary Center for Earthquake Engineering Research (Highway Project TEA-21, EXT-3C, and SAFETEA LU, Task 3.2). This support is gratefully acknowledged. The medium-sized bearings were manufactured by Dynamic Isolation Systems, Inc., of Sparks, Nevada. The small-sized bearings were manufactured by Scougal Rubber, of Seattle, Washington.
References
AASHTO. (1999). Guide specifications for seismic isolation design, American Association of State Highway and Transportation Officials, Washington, D.C.
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Constantinou, M. C., Whittaker, A. S., Kalpakidis, Y., Fenz, D. M., and Warn, G. P. (2007). “Performance of seismic isolation hardware under service and seismic loading.” Technical Rep. No. MCEER-07-0012, Multidisciplinary Center for Earthquake Engineering Research, Buffalo, N.Y.
Kalpakidis, I. V., and Constantinou, M. C. (2008). “Effects of heating and load history on the behavior of lead-rubber bearings.” Technical Rep. No. MCEER-08-0027, Multidisciplinary Center for Earthquake Engineering Research, Buffalo, N.Y.
Naeim, F., and Kelly, J. M. (1999). Design of seismic isolated structures: From theory to practice, Wiley, New York.
Skinner, R. I., Robinson, W. H., and McVerry, G. H. (1993). An introduction to seismic isolation, Wiley, Chichester, England.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 5 • May 2010
Pages: 491 - 501
Copyright
© 2010 ASCE.
History
Received: May 29, 2008
Accepted: Nov 2, 2009
Published online: Nov 4, 2009
Published in print: May 2010
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