Fatigue of cold-worked reinforcing bars 1

[kww2008]

Many old slab bridges (pre-1975) have cold-worked reforcing bars. Could someone point me to information about the fatigue characteristic of these bars ? This information is required for load-rating older bridges.

 

[wiktor]

Try this publication. It has all information required.

http://www.springerlink.com/content/d871244w4076v035/

 

[jheidt2543]

You could also check these from ACI:

#1 How Harmful Is Cold Bending/Straightening of Reinforcing Bars?


Document: CI2104Restrepo
Author(s): J. I. Restrepo, F. J. Crisafulli
Publication: Concrete International
Volume: 21
Issue: 4
Keywords: embrittlement; reinforced concrete; reinforcing steel; strain rate; temperature; tension tests
Date: April 1, 1999

#2 Fatigue of Reinforced Concrete Beams in Air, Chloride Solution, and Sea Water


Document: SP75-15
Author(s): H. Roper and G. B. Hetherington
Publication: Special Publication
Volume: 75
Keywords: beams (supports) '(fracturing');formed rein ; chlorid forcement tests; reinforcing steels; sea water es; corrosion; cracking fatigue (materials); fatigue
Date: September 1, 1982

#3 Reinforcing Steel in Concrete and the Concept of Safety


Document: JL48-37
Author(s): K. Hajnal-Konyi
Publication: Journal Proceedings
Volume: 48
Issue: 3
Keywords: no keywords
Date: March 1, 1952