Advertisement

KSCE Journal of Civil Engineering

, Volume 6, Issue 2, pp 143–150 | Cite as

Fatigue behavior of the transverse stiffener subjected to constant amplitude loading

  • Sang-Ik Woo
Structural Engineering
  • 125 Downloads

Abstract

Objectives of this study are to examine the fatigue behavior of the transverse stiffener in comparison with other previous studies. The shape of fatigue cracks depended upon the number of crack initiation sites along the weld toe. Fatigue cracks initiated at a corner had quarter-elliptical fronts. And, the crack propagated through the thickness of the main plate until the remaining ligament eventually fractured at an average net section stress nearly equal to the tensile strength. The constant amplitude fatigue limits for the specimens tested atf min =14 N/mm2 andf max =290 N/mm2, were respectively predicted with the mean regression line,s=0.084,m=4.097, using by the number of run outs in percent. By changing fromf min =14 N/mm2 tof max =290 N/mm2, the fatigue strength decreased clearly in the finite life region and so did the lower bound fatigue limit fromF rl =110 to 83 N/mm2. For the effect of the weld type, it was also found that the excellent quality of automatic welding resulted in a large root radius at the weld toe and thus significantly increased the fatigue strength of both stiffeners from category C to B'

Keywords

constant amplitude loading crack initiation crack propagation fatigue life fatigue limit fatigue crack stress range transverse stiffener weld toe 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Albrecht, P., Abtahi, A., and Irwin, G. R., “Fatigue Strength of Overload Bridge Components”, Report No. FHWA-MD/RD-76/07, State Highway Administration, Division of Materials and Research, Maryland Department of Transportation, Baltimore, Md., 1976.Google Scholar
  2. “AASHTO LRFD Bridge Design Specification”, 1st edition American Association of State Highway And Transportation Officials, 1994, pp. 6–18, 6–32.Google Scholar
  3. Fisher, J.W., Albrecht, P., Yen, B.T., Klingerman, D.J., and McNamee, B.M., “Fatigue Strength of Steel Beams with Welded Stiffeners and Attachments.” NCHRP Report 147, Transportation Research Board, National Research Council, Washington, DC, 1974.Google Scholar
  4. Klippstein, K.H. and Schilling, C.G., “Pilot Study on the Constant and Variable Amplitude Behavior of Transverse Stiffener Welds”.Special Issue on Fatigue and Fracture, Journal of Constructional Steel Research, Vol. 12, No. 3 and 4, 1989, pp. 229–252.Google Scholar
  5. Woo, S.I. and Jung, K.S., “The Fatigue Life of Transverse Stiffener with Damaged Bead Section”.Journal of Korean Society of Civil Engineering, Vol. 18, No. 1-3, May. 1998, pp. 335–343.Google Scholar
  6. Woo, S. I. and Jung, K. S., “Fatigue Behavior of Gusset Plates Subjected to out-of-plane Distortions”,Journal of Korean Society of Civil Engineering, Vol. 4, No. 1, Mar. 2000.Google Scholar
  7. Woo, S.I., Chung, Y.W., Jung, K.S., Jo., J.B., and Bae, D.B., “An Experimental Study of the Fatigue Specimen for the typical Structural Details of the Steel Bridge”.5th Pacific Structural Steel Conference, Oct., 13–16, 1998, Seoul KOREA, pp. 159–164.Google Scholar

Copyright information

© KSCE and Springer jointly 2002

Authors and Affiliations

  1. 1.Korea Atomic Energy Research InstituteHANARO Applications ResearchDaejeonKorea

Personalised recommendations