Estimating Seismic Demands for Isolation Bearings with Building Overturning Effects
- 1 July 2006
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Structural Engineering
- Vol. 132 (7), 1118-1128
- https://doi.org/10.1061/(asce)0733-9445(2006)132:7(1118)
Abstract
An earlier procedure that estimates the peak deformation in base-isolated buildings is extended to include overturning and thereby estimate the peak axial forces in individual isolators. Such tools can be used as part of a design procedure to predict and subsequently eliminate bearing tension by modifying the design. The procedure is based on nonlinear response history analysis of an isolated block using an advanced bearing model that incorporates the relation between axial load and bearing response, known as axial-load effects. Rocking of the structure and bearing axial-load effects are found to have little influence on the peak lateral bearing deformation; median response spectra are within 10% of those when rocking is neglected entirely. Furthermore, bearing axial-load effects can usually be neglected in determining the maximum and minimum bearing axial forces; cases are identified where the error in neglecting such effects exceed 10%. Because the structure has been modeled as rigid, the limitations of the procedure should be assessed for superstructure designs that allow significant structural deformation.Keywords
This publication has 12 references indexed in Scilit:
- Nonlinear Model for Lead–Rubber Bearings Including Axial-Load EffectsJournal of Engineering Mechanics, 2005
- Testing and Modeling of Prestressed IsolatorsJournal of Structural Engineering, 2005
- Estimation of Seismic Demands on Isolators Based on Nonlinear AnalysisJournal of Structural Engineering, 2004
- Tension Buckling in Multilayer Elastomeric BearingsJournal of Engineering Mechanics, 2003
- Isolated Buildings and the 1997 UBC Near-Source FactorsEarthquake Spectra, 2000
- Earthquake-Resistant Design with RubberPublished by Springer Science and Business Media LLC ,1997
- Experimental Study of Sliding Isolated Structures with Uplift RestraintJournal of Structural Engineering, 1992
- Displacement Control and Uplift Restraint for Base‐Isolated StructuresJournal of Structural Engineering, 1990
- Seismic response of base isolated buildings including p-Δ effects of isolation bearingsEarthquake Engineering & Structural Dynamics, 1989
- Seismic response of base‐isolated structures with vertical‐rocking couplingEarthquake Engineering & Structural Dynamics, 1984