Title:
Fatigue Tests of Reinforcing Bars-Tack
Welding of Stirrups
Author(s):
Kenneth T. Burton and Eivind Hognestad
Publication:
Journal Proceedings
Volume:
64
Issue:
5
Appears on pages(s):
244-252
Keywords:
beams (structural);fatigue (materials);high strength steels;reinforced concrete; reinforcement;reinforcing steel;research;stirrups;structural design;testing; welding
DOI:
10.14359/7561
Date:
5/1/1967
Abstract:
This paper reports fatigue tests of concrete beams with tied stirrups and with stirrups tack welded to the main tension reinforcement. The beams were reinforced with #8 in-termediate grade and ASTM A 432 high strength bars of one deformation pattern. Test results of 68 beams indicate that careless tack welding of stirrups can reduce fatigue life of the longitudinal bars at a given stress range by 75 percent. Similarly, stress range at 5 million cycles can be reduced by 35 percent. Bar yield strength had only minor influence on fatigue strength for comparable stress ranges at 5 million repetitions.