Probabilistic Assessment of Welded Joints versus Fatigue and Fracture
Publication: Journal of Structural Engineering
Volume 127, Issue 2
Abstract
This paper presents a probabilistic reliability assessment procedure for steel components damaged by fatigue. The crack growth model is based on the principles of fracture mechanics theory. It is compared to experimental results and gives a good prediction. The fatigue safety margin includes the crack growth from an initial crack depth to a final crack depth determined according to the fracture mechanics theory: brittle and ductile fractures. The reliability calculus is performed using a first-order reliability method. The sensitivity analysis of different parameters shows that some variables can be taken as deterministic. Applications are made on a transverse-stiffener-to-bottom-flange welded joint of a typical steel bridge.
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References
1.
Bleck, W., et al. ( 1998). “Composite bridge design improvement for high speed railways.” ECCS Proj. 7210/SA/128, Draft, Final Rep., Rheinische-Westfael Technische Hochschule, Aachen, Germany.
2.
Bremen, U. ( 1989). “Amélioration du comportement à la fatigue d'assemblages soudés: Étude et modélisation de l'effet de contraintes résiduelles [Improvement of the fatigue behavior of welded joints: Study and modeling of residual stresses].” PhD thesis, EPFL, Lausanne, France (in French).
3.
Byers, W. G., Marley, M. J., Mohammadi, J., Nielsen, R. J., and Sarkani, S. (1997). “Fatigue reliability reassessment applications: State-of-the-art paper.”J. Struct. Engrg., ASCE, 123(3), 277–285.
4.
Carracilli, J., Le Pautremat, E., Jacob, B., and Galtier, A. ( 1995). “Comportement en fatigue des poutres métalliques de ponts [Fatigue behavior of bridge steel girders].” ECCS Proj. 7210/SA/311, Draft, Final Rep., LCPC, Paris (in French).
5.
Cremona, C. ( 1996). “Reliability updating of welded joints damaged by fatigue.” Int. J. Fatigue, 18(8), 567–575.
6.
Cremona, C., and Carracilli, J. ( 1998). “Evaluation of extreme traffic loads effects in cable stayed and suspension bridges by use of WIM records.” Proc., 2nd Eur. Conf. on Weigh-in-Motion of Road Vehicles, 243–251.
7.
EN 10025. ( 1993). “Hot-rolled products of non alloy structural steels—Technical delivery conditions.” European standard, CEN, Bruxelles.
8.
Engesvik, K. M., and Torgeir, M. ( 1983). “Probabilistic analysis of the uncertainty in the fatigue capacity of welded joints.” Engrg. Fracture Mech., 18(4), 743–762.
9.
Eurocode 3. ( 1992). “Design of steel structures: General rules and rules for buildings.” European prestandard, CEN, Bruxelles.
10.
Hobbacher, A. ( 1993). “Stress intensity factors of welded joints.” Engrg. Fracture Mech., 46(2), 173–182.
11.
Kretz, T., and Jacob, B. ( 1991). “Convoi de fatigue pour les ponts-route mixtes [Fatigue train for composite road bridges].” Constr. Métallique, 1, 41–51 (in French).
12.
Lukić, M. ( 1999). “Évaluation et maintenance probabilistes des assemblages soudés vis-à-vis de la fatigue et de la rupture. Application aux ponts mixtes [Probabilistic assessment and maintenance of welded joints versus fatigue and fracture. Application to composite bridges].” PhD thesis, ENPC, Paris (in French).
13.
McDowell, D. L. ( 1996). “Basic issues in the mechanics of high cycle metal fatigue.” Int. J. Fracture, 80, 103–145.
14.
Madsen, H. O., Krenk, S., and Lind, N. C. ( 1988). Methods of structural safety, Prentice-Hall, Englewood Cliffs, N.J.
15.
Milne, I., Ainsworth, R. A., Dowling, A. R., and Stewart, A. T. ( 1986). “Assessment of the integrity of structures containing defects.” Rep. No. R/H/R6-Revision 3, CEGB, Berkeley, Calif.
16.
Newman, J. C., Jr. and Raju, I. S. ( 1983). “Stress-intensity factor equations for cracks in three-dimensional finite bodies.” Proc., Fracture Mech.: 14th Symp., J. C. Lewis and G. Sines, eds., ASTM, West Conshohocken, Pa., I-238–I-265.
17.
Nussbaumer, A. ( 1997). “Développement d'un modèle de fiabilité pour les ponts métalliques combinant fatigue et rupture [Development of reliability model for steel bridges combining fatigue and fracture].” Internal Rep., CTICM, Saint-Rémy-lès-Chevreuse, France (in French).
18.
Paris, P. C., and Erdogan, F. ( 1963). “A critical analysis of crack propagation laws.” J. Basic Engrg., 85, 528–534.
19.
Guide de conception et de justifications, SETRA, Bagneux, France (in French).
20.
Sedlacek, G., et al. ( 1997). “Design of steel structures, Part 2—Bridges, for chapter 3—Materials, choice of steel material to avoid brittle fracture.” Background documentation to Eurocode 3, Draft, Rheinische-Westfael Technische Hochschule, Aachen, Germany.
21.
Wallin, K. ( 1995). “Validation of methodology for selecting Charpy toughness criteria for old thin low strength steels.” Publ. 216, VTT, Espoo.
22.
Yamada, K., Nagatsu, S., and Mitsugi, Y. ( 1989). “Evaluation of scatter of fatigue life of welded details using fracture mechanics.” First draft, Draft, Dept. of Civ. Engrg., Nagoya University, Nagoya, Japan.
23.
Zhao, Z., and Haldar, A. ( 1996). “Bridge fatigue damage evaluation and updating using non-destructive inspections.” Engrg. Fracture Mech., 53(5), 775–788.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 127 • Issue 2 • February 2001
Pages: 211 - 218
History
Received: May 21, 1999
Published online: Feb 1, 2001
Published in print: Feb 2001
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