NEHRP Clearinghouse
- Title
- Inelastic Design and Experimental Testing of Compact and Noncompact Steel Girder Bridges.
- File
- PB97178107.pdf
- Author(s)
- Barker, M. G.; Hartnagel, B. A.; Schilling, C. G.; Dishongh, B. E.
- Source
- Missouri Highway and Transportation Dept., Jefferson City.; Federal Highway Administration, Washington, DC.; National Science Foundation, Arlington, VA.; Bethlehem Steel Corp., PA., May 1997, 200 p.
- Abstract
- Sixteen Type D bridge bearings were cyclically tested to determine the bearing response to vertical and simulated longitudinal loads. The purpose of the tests is 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 1.75 in. each direction 40 times in the 'as received' state. After this initial test, another 40 cycle test was conducted. The desired friction force-deformation hysteretic loops were determined for the net horizontal force-deformation test results. The cycles were applied in a sinusoidal manner in deflection control with a 4 second period to simulate dynamic demand on the bearing.
- Keywords
- ; Seismic design; Retrofitting; Deflections; Tests; Dynamic tests; Earthquake engineering; Girder bridges; Bearings