United States Department of Transportation
i
UDOT calibration of AASHTO's new prestress loss design equations.
-
2009-07-01
-
[PDF-3.64 MB]
Details:
-
Alternative Title:Report No. UT-09.10: UDOT calibration of AASHTO's new prestress loss design equations
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final report; July 2007-July 2009.
-
Corporate Publisher:
-
Abstract:In the next edition of the AASHTO LRFD Bridge Design Specifications the procedure to calculate prestress losses will change dramatically. The new equations are empirically based on high performance concrete from four states (Nebraska, New Hampshire, Texas and Washington). The material testing resulted in modified equations to predict elastic shortening, shrinkage and creep. Because high performance concrete has traditionally resulted in smaller prestress losses these new equations also estimate lower losses in comparison to the existing equations. Many of the bridges built in Utah do not use specifically high performance concrete, but a self consolidating concrete that is different than the mixes that were used to develop the new AASHTO equations. Appropriate design parameters need to be established in order to apply them in the new AASHTO LRFD prestress loss calculations. This report summarizes the calibration of the AASHTO prestress loss equations for UDOT.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
