Final Research Report Agreement T2695, Task 53 Bridge Rapid Construction Design of Precast Concrete Piers for Rapid Bridge Construction in Seismic Regions by Jonathan M. Wacker Graduate Research Assistant John F. Stanton Professor David G. Hieber Graduate Research Assistant Marc O. Eberhard Professor Department of Civil and Environmental Engineering University of Washington Seattle, Washington 98195 Washington State Transportation Center (TRAC) University of Washington, Box 354802 1107 NE 45th Street, Suite 535 Seattle, Washington 98105-4631 Washington State Department of Transportation Technical Monitor Jugesh Kapur Bridge Design Engineer, Bridge and Structures Office Prepared for Washington State Transportation Commission Department of Transportation and in cooperation with U.S. Department of Transportation Federal Highway Administration December 2005