UDOT's calibration of AASHTO's new prestress loss design equations.

Barr, Paul J.; Halling, Marv; Boone, Shane; Toca, Raul; Angomas, Franklin

i

UDOT's calibration of AASHTO's new prestress loss design equations.

2009-07-01
By Barr, Paul J. ; Halling, Marv ; Boone, Shane

File Language:

English

Details

Alternative Title:

Report No. UT-09.10: UDOT calibration of AASHTO's new prestress loss design equations
Creators:

Barr, Paul J. ; Halling, Marv ; Boone, Shane ; Toca, Raul ; Angomas, Franklin
Corporate Creators:

Utah State University. Department of Civil and Environmental Engineering
Corporate Contributors:

Utah. Dept. of Transportation. Research Division
Subject/TRT Terms:
Publication/ Report Number:

UT-09.10
Resource Type:

Tech Report
Geographical Coverage:

Utah
Edition:

l report; July 2007-July 2009.
Corporate Publisher:

Utah. Department of Transportation
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:

PDF
Funding:

079114
Download URL:

https://rosap.ntl.bts.gov/view/dot/18535/dot_18535_DS1.pdf
File Type:

[PDF - 3.64 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:90c5bc5b0f065dd290d07f167ef29da0d443fd6015c5ae1bd2a6ded63c8740ea

File Language:

English

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