Force-Deformation Behavior of Isolation Bearings
Publication: Journal of Bridge Engineering
Volume 12, Issue 4
Abstract
The isolation bearings are widely used in earthquake prone areas to protect the structure from seismic forces. The isolation bearing consists of an isolator to increase the natural period of the structure away from the high-energy periods of the earthquake, and a damper to absorb energy in order to reduce the seismic force. The most common isolation bearings used are lead–rubber bearings. They combine the function of isolation and energy dissipation in a single compact unit, giving structural support, horizontal flexibility, damping, and a centering force in a single unit. The relation between the horizontal force and horizontal displacement of the isolation bearings is nonlinear; to calculate the stiffness and the damping constant, which correspond to effective design displacement, the nonlinear behavior is expressed by bilinear behavior. This technical note presents new relations to calculate yield force, horizontal displacement, and damping.
Get full access to this article
View all available purchase options and get full access to this article.
References
AASHTO. (2004). LRFD standard specifications for highway bridges, 3rd Ed., Washington, D.C.
“Design specifications of highway bridges.” (1998). Seismic isolation design, seismic design technical memorandum, EED, PWRI, No. 9801, Part 5, Japan Road Association, 91–109.
Naeim, F., and Kelly, J. M. (1999). “Design of seismic isolated structures from theory to practice.” Mechanical characteristics and modeling of isolators, Wiley, New York, 93–121.
Skinner, R. I., Robinson, W. H., and Mc Verry, G. H. (1993). An introduction to seismic isolation Wiley, New York.
Information & Authors
Information
Published In
Copyright
© 2007 ASCE.
History
Received: May 22, 2006
Accepted: Jul 14, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.