Group: Seismic
Subject: Grouted Ducts
State: Washington Abstract:
The use of precast components in bridge bents can accelerate bridge construction, but their use in seismic systems is challenging. Such systems must have connections that are both easy to assemble on site, and have sufficient strength and ductility during earthquakes. A precast bridge bent beam-column connection that is suitable for rapid construction in seismic regions has been developed and tested. The connection features a small number of large (#18) vertical column bars grouted into large corrugated ducts embedded in the cap-beam. This combination provides speed and simplicity of erection, as well as generous construction tolerances. Lateral-load tests on the system showed that it has strength and ductility similar to those of a comparable cast-in-place connection, and that deliberate debonding of a short length of the bars has little effect on its seismic performance.
Key Words:
Precast concrete, bridge substructures, bents, bridge column, accelerated bridge construction, anchorage, ducts
Specific ABC aspect:
Budget and Timeline
Budget (USD): 0.00
Project length: 0
Project Starting Year: 2008
Project Completion Year: 2008
Primary Sponsor
Washington State Department of Transportation
Research Office Transportation Building, MS 47370
Olympia, WA 98504 USA
Kim Willoughby
360-705-7978
Primary Performing Organization
Washington State Transportation Center (TRAC)
University of Washington, Box 354802
University District Building;
1107 NE 45th Street, Suite 535
Seattle, WA 98105-4631 USA
PI:
John Stanton
Professor
Co-PI:
Mark Eberhard
Professor
Other Documents
View Final-Reort-UW-WARD-684.2.pdf
Other Related URLs
Go to: http://www.wsdot.wa.gov/eesc/bridge/abc/Final%20Reort%20UW%20WARD%20684.2.pdf