Pre-cast segmental construction similar to technique being used in new San Francisco Oakland Bay Bridge
|Pre-cast segmental bridge test set-up at the UCSD Powell Research Laboratories.|
|Components for the San Francisco Oakland Bay Bridge East Span currently being stored at Stockton, California.|
Although pre-cast segmental bridge construction has been used in Europe and some parts of the
The tests taking place at UCSD are part of a full-system test on a 50% scale bridge. and represent the final proof of concept test in a five-year testing program conducted with the American Segmental Bridge Institute and supported by the California Department of Transportation.
The UCSD Jacobs School of Engineering test is focusing on the joints at the tops of the supporting columns which connect to the bridge deck. These joints have been designed to suffer intentional, targeted damage in order to dissipate energy and ensure the safety and continued operation of the overall structure after an earthquake. During the tests, approximately 150,000 pounds of force pushes the bridge back and forth over a span of about eight inches. This slow-motion pseudodynamic test simulates the movements and forces that would be applied to such a bridge during an actual earthquake. The large-scale seismic bridge test will continue over the next several weeks.
|Dean Frieder Seible talks about the final stage of testing for the construction technique used on the new East Span of the Bay Bridge. Length: 4:25||Structural engineering professor Jose Restrepo discusses technical aspects of the bridge testing and how the results will be analyzed. Length: 2:21||Kelly Burnell, a Ph.D. candidate, talks about his role in managing the shake test and why UCSD is attractive to graduate students. Length: 4:09|
|Majid Madani, senior bridge engineer for Caltrans, discusses why the agency is sponsoring the Powell Labs tests. Length: 1:27||Cliff Freyermuth, executive director of the American Segmental Bridge Institute, explains the origins of the program. Length: 1:32|