Multiaxial Behaviors of Laminated Rubber Bearings and Their Modeling. I: Experimental Study
- 1 August 2004
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Structural Engineering
- Vol. 130 (8), 1119-1132
- https://doi.org/10.1061/(asce)0733-9445(2004)130:8(1119)
Abstract
Cyclic behaviors of three types of laminated rubber bearings under multiaxial loading state are studied. First, the characteristics of the restoring forces of these bearings in small amplitude are investigated. The experimental results show that the equivalent stiffness of high damping rubber bearings is increased and the damping ratio is decreased as the increase of the amplitude. In addition, the restoring force of a lead rubber bearing is found to highly depend on the vertical load. Second, a triaxial loading experiment, in which two-directional displacement paths are given to the bearings under a constant vertical load, is conducted. The experimental results indicate that horizontal restoring forces possess the coupling effects. The equivalent stiffness and damping ratio of high damping rubber bearings and natural rubber bearings are increased due to this coupling effect in comparison with the biaxial loading case, while the lead rubber bearing shows a slight decrease in them. Hence it is understood that the effects of the triaxial loading are not negligible and these have to be considered in a rational and reliable design.Keywords
This publication has 13 references indexed in Scilit:
- A mathematical hysteretic model for elastomeric isolation bearingsEarthquake Engineering & Structural Dynamics, 2002
- The Behavior of Bearings Used for Seismic Isolation under Shear and Axial LoadEarthquake Spectra, 1999
- Design of Seismic Isolated StructuresPublished by Wiley ,1999
- Analytical Modeling of High Damping Rubber BearingsJournal of Structural Engineering, 1997
- AN ANALYTICAL HYSTERESIS MODEL FOR ELASTOMERIC SEISMIC ISOLATION BEARINGSEarthquake Engineering & Structural Dynamics, 1997
- Verification of Friction Model of Teflon Bearings under Triaxial LoadJournal of Structural Engineering, 1993
- Nonlinear Dynamic Analysis of 3‐D‐Base‐Isolated StructuresJournal of Structural Engineering, 1991
- Further Results on Frictional Properties of Teflon BearingsJournal of Structural Engineering, 1991
- Teflon Bearings in Base Isolation II: ModelingJournal of Structural Engineering, 1990
- Teflon Bearings in Base Isolation I: TestingJournal of Structural Engineering, 1990