Category: Completed Projects
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:

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Budget and Timeline

Budget (USD): 0.00
Project length: 0
Project Starting Year: 2008
Project Completion Year: 2008

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Primary Sponsor

Washington State Department of Transportation
Research Office Transportation Building, MS 47370
Olympia, WA 98504 USA

Kim Willoughby
360-705-7978

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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

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Other Documents

View Final-Reort-UW-WARD-684.2.pdf

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Other Related URLs

Go to: http://www.wsdot.wa.gov/eesc/bridge/abc/Final%20Reort%20UW%20WARD%20684.2.pdf