LONGITUDINAL RESTRAINT RESPONSE OF EXISTING BRIDGE BEARINGS
Fifteen rocker bridge bearings were cyclically tested to determine their bearing response to simulated seismic longitudinal loads. The objective of the tests was to examine the load-deformation characteristics and energy dissipation capabilities of bearings that have been in service for many years. The results are to be used to determine if existing in-place bearings may be utilized in seismic retrofitting of earthquake-susceptible bridges. The bearings were cycled within working ranges in each direction in the as-received state. The desired friction force hysteretic loops were determined from the net horizontal force-deformation test results. The cycles were applied in a sinusoidal manner in deflection control with a 4-sec period to simulate dynamic demand on the bearing. An equivalent friction coefficient was calculated for each bearing. Four of the bearings were tested statically to failure to examine the limit state response. The ultimate limit tests produced horizontal load-deformation data. The horizontal force was applied slowly in deflection control while data were acquired until failure. The ultimate bearing tests showed that all four bearings had large deflection capacities before instability.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309064694
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1624, Structural Analysis and Design: Bridges, Culverts, and Pipes.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Barker, M G
- Hartnagel, B A
- Publication Date: 1998
Language
- English
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 28-35
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Serial:
- Transportation Research Record
- Issue Number: 1624
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Bridge bearings; Cyclic tests; Deformation; Dissipation; Earthquake engineering; Earthquake resistant design; Force; Limit state design; Loads; Retrofitting; Ultimate load design
- Uncontrolled Terms: Horizontal loads; Longitudinal forces
- Subject Areas: Bridges and other structures; Design; Energy; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00756069
- Record Type: Publication
- ISBN: 0309064694
- Files: TRIS, TRB
- Created Date: Nov 2 1998 12:00AM