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A Fatigue Study of Prestressing Strand

by Conrad Paulson, Wiss, Janney, Elstner Associates, Northbrook, IL, USA,
Karl H. Frank, Wiss, Janney, Elstner Associates, Northbrook, IL, USA,



Document Type: Proceeding Paper

Part of: Materials and Member Behavior

Abstract:

Strand fatigue data reported in the literature and also from recent tests were combined to form a data base of strand fatigue data 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 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 and strand tension systems when considering the life of the strand.

Subject Headings: Regression analysis | Prestressing | Fatigue life | Stress analysis | Data analysis | Fatigue tests | Steel structures

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