Release Methodology of Prestressing Strands

Kannel, Jeffrey J.; French, Catherine E. W.; Stolarski, Henry K.; University of Minnesota. Dept. of Civil Engineering

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Release Methodology of Prestressing Strands

1998-05-01
By Kannel, Jeffrey J. ; French, Catherine E. W. ; Stolarski, Henry K.

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English

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Creators:

Kannel, Jeffrey J. ; French, Catherine E. W. ; Stolarski, Henry K.

Kannel, Jeffrey J. ; French, Catherine E. W. ; Stolarski, Henry K. Less -
Corporate Creators:

University of Minnesota. Dept. of Civil Engineering
Corporate Contributors:

Minnesota. Department of Transportation
Subject/TRT Terms:

[+]

Bridges And Other Structures Construction Fracture Mechanics Girder Bridges Highways I53: Construction Of Bridges And Retaining Walls Prestressed Concrete
Publication/ Report Number:

MN/RC-2000-09
Resource Type:

Tech Report
Geographical Coverage:

Minnesota ; United States

Minnesota ; United States Less -
TRIS Online Accession Number:

00796932
Edition:

Final Report
Corporate Publisher:

Minnesota. Dept. of Transportation
Abstract:

This report presents the results of numerical and experimental investigations to determine the causes of prestressed concrete girder end cracks. The cracks, which develop during the flame-cutting release process, result from the restraining effect of unreleased strands as the girder shortens from the partially transferred prestress and from shear stresses generated by the cutting order of the strands. Researchers examined several methods to eliminate the cracks, such as making changes to the strand cutting pattern, debonding some of the strands in the end regions, and increasing the slope of the top surface of the bottom flange. Implementation of the first two of these methods in the field proved successful.
Format:

PDF
Funding:

72629
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:d0fb76d5c682cfb2c71c35646fd21a51d0198330ef7320a5504469666f89e7c4
Download URL:

https://rosap.ntl.bts.gov/view/dot/42164/dot_42164_DS1.pdf
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Release Methodology of Prestressing Strands

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