NEHRP Clearinghouse
- Title
- Study of the Coupled Horizontal-Vertical Behavior of Elastomeric and Lead-Rubber Seismic Isolation Bearings.
- File
- PB2007108679.pdf
- Author(s)
- Warn, G. P.; Whittaker, A. S.
- Source
- Federal Highway Administration, Washington, DC.; National Science Foundation, Washington, DC., September 22, 2006, 344 p.
- Identifying Number(s)
- MCEER-06-0011
- Abstract
- This report presents an analytical and experimental investigation of the coupled horizontal-vertical response of elastomeric and lead-rubber bearings focusing on the influence of lateral displacement on the vertical stiffness. Component testing was performed with reduced scale low-damping rubber (LDR) and lead-rubber (LR) bearings to determine the vertical stiffness at various lateral offsets. The numerical studies included finite element (FE) analysis of the reduced scale LDR bearing. The results of the experimental and FE investigations were used to evaluate three analytical formulations to predict the vertical stiffness at a given lateral displacement. The results of simulations performed with three components of excitation were used to evaluate an equivalent linear static (ELS) procedure for the estimation of the vertical load due to the vertical ground shaking. References, tables and figures are included, as well as 4 appendices at the end of the report.
- Keywords
- ; Evaluation; Finite element method; Earthquake resistant structures; Seismic design; Structural vibration; Ground motion; Earthquake engineering; Excitation; Stiffness; Elastomeric isolators; Seismic effects; Vibration isolators; Simulations; Bearings; Seismic isolation; Rubber