Title:
Improved Bearing Design Concepts for Increased Seismic Resistance of Highway Bridges
Author(s):
Roy A. lmbsen
Publication:
Symposium Paper
Volume:
70
Issue:
Appears on pages(s):
509-523
Keywords:
bearing capacity; bearings; bridge bearings; costs; earthquake resistant structures; highway bridges; isolation joints; pads; plastics, polymers and resins; structural design.
DOI:
10.14359/17426
Date:
1/1/1981
Abstract:
An attempt to increase the survivability of bridges in earthquakes through the use of improved bearing systems is explored. By reviewing the performance of various bearing systems in past earthquakes, the most desirable characteristics are selected and incorporated into new bearing systems. New concepts for fixed and expansion bearings are described. A concept utilizing an elastomeric bearing pad on a sliding friction surface is investigated analytically. These results indicate that this concept has some advantages for bridges over other concepts employing isolation. Finally, a potential design procedure for selecting the most cost-effective bearing system is described.