Performance of Bridges in Cold Regions with Sliding Seismic Isolation Bearings

Effects of extreme temperature on highway bridges in cold regions seismically isolated with sliding type bearings are investigated. The critical factor in consideration is the change in the performance of isolation bearings with significant variation in temperature between seasons. The sliding bearing behavior is characterized by the friction coefficient of the sliding surfaces. The friction coefficient during a seismic motion varies with the sliding velocity and temperature at the sliding surface. Tests associated with past applications have indicated a marked increase in the value of friction coefficient resulting in higher stiffness of bearings at very cold temperatures. The effects of change in bearing stiffness on the seismic performance of the bridge in general and the substructure in particular are demonstrated here. This study aims to capture the change in bearing response and subsequently the overall structural response considering a temperature variation between −40°C and +40°C. Response parameters considered for this study are the base shear in the piers, the acceleration of the bridge deck, maximum and residual displacement of the isolation bearings, as well as the energy dissipation capacity. The response parameters are compared for individual ground motions as well as the mean and coefficient of variation (COV). It is observed that the higher bearing stiffness at extreme cold temperature leads to additional forces on the substructure which reduces the margin of safety and hence should be considered carefully in design.

• Record URL:
  https://doi.org/10.1061/9780784483589.014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784483589
• Supplemental Notes:
  • © 2021 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Rahman, Jesika
  • Billah, A H M Muntasir
  • Iqbal, Asif
• Conference:
  • Regional Conference on Permafrost 2021 and the 19th International Conference on Cold Regions Engineering
  • Date: 2021-10-24 to 2021-10-29
• Publication Date: 2021-10

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 151-162
• Monograph Title: Permafrost 2021: Merging Permafrost Science and Cold Regions Engineering

Subject/Index Terms

• TRT Terms: Bridge bearings; Earthquake resistant design; Frigid regions; Highway bridges; Performance
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 01788816
• Record Type: Publication
• ISBN: 9780784483589
• Files: TRIS, ASCE
• Created Date: Nov 18 2021 12:14PM