A Study of the Coupled Horizontal-Vertical Behavior of Elastomeric and Lead-Rubber Seismic Isolation Bearings

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; the four accompanying appendices can be found in PDF on an accompanying CD-ROM.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Warn, Gordon P
  • Whittaker, Andrew S
• Publication Date: 2006-9-22

Language

• English

Media Info

• Media Type: Print
• Edition: Technical Report
• Features: Appendices; CD-ROM; Figures; References; Tables;
• Pagination: 247p

Subject/Index Terms

• TRT Terms: Base isolation; Bridges; Earthquake resistant design; Finite element method; Resistance (Mechanics); Seismicity; Stiffness
• Uncontrolled Terms: Earthquake shaking; Elastomeric bearings; Equivalent linear static design for restrainers; Lateral displacement; Lead rubber bearings
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01076693
• Record Type: Publication
• Report/Paper Numbers: MCEER-06-0011
• Contract Numbers: DTFH61-98-C-00094
• Files: TRIS, USDOT
• Created Date: Sep 6 2007 12:23PM