A Fatigue Study of Prestressing Strand

Paulson, Conrad; Frank, Karl H.; Breen, John E.; University of Texas at Austin. Center for Transportation Research

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A Fatigue Study of Prestressing Strand

1983-04-01
By Paulson, Conrad ; Frank, Karl H. ; Breen, John E.

[PDF-3.32 MB]

English

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Details:

Creators:

Paulson, Conrad ; Frank, Karl H. ; Breen, John E.

Paulson, Conrad ; Frank, Karl H. ; Breen, John E. Less -
Corporate Creators:

University of Texas at Austin. Center for Transportation Research
Corporate Contributors:

Texas. Department of Highways and Public Transportation. Transportation Planning Division ; United States. Federal Highway Administration

Texas. Department of Highways and Public Transportation. Transportation Planning Division ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Bridge Cables Bridge Design Bridges And Other Structures Cable Stayed Bridges Cable Stays Design Fatigue Fatigue Tests Girder Bridges Girders Highways Prestressing Prestressing Strands Regression Analysis Steel Bridges
Publication/ Report Number:

FHWA/TX-82/54+300-1, 300-1
Resource Type:

Tech Report
Geographical Coverage:

United States
TRIS Online Accession Number:

01614937
Corporate Publisher:

University of Texas at Austin. Center for Transportation Research
Abstract:

This study reviews the literature which reports on fatigue studies of prestressing strand and also presents the results of a series of strand fatigue tests. The fatigue tests compared tests on samples of strand from several manufacturers with tests on a sample of strand to be used in construction of girder fatigue specimens. Strand fatigue data from the literature and from the tests were combined to form a strand fatigue data base which was analyzed using regression analysis techniques. A stress range vs. fatigue life curve for prestressing strand was developed and was used as the basis for a strand fatigue design equation. The design equation was compared with current AASHTO code provisions for fatigue of structural steel and was found to lie midway between Category A and Category B curves for redundant structures. Category B is recommended for checking the allowable fatigue stresses in uncracked girders. Designing to this category provides an extreme lower bound to all the strand data collected and should ensure no fatigue problems regardless of the size, strength, and relaxation properties of the strand. Girders which are cracked and then subjected to fatigue loads may produce fatigue failures at much lower strand stress ranges than Category B. Recommendations for cracked girders will be developed from the girder tests to be performed as part of the research project. The results also indicate that Category B is satisfactory for designing strand tension systems, such as cable stays, when considering the life of the strand. The fatigue performance of the socketing or grip system must be evaluated separately.
Format:

PDF
Funding:

3-5-80-300
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:de1c9f59febf000c1274b62c9c677a9c10798603567da9d5c5716da2f811b2ed
Download URL:

https://rosap.ntl.bts.gov/view/dot/37039/dot_37039_DS1.pdf
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A Fatigue Study of Prestressing Strand

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