The Fatigue Behavior of Steel Structures under Random Loading

Abstract:

Article Preview

Fatigue damage accumulation in steel structures under random loading has been studied in a number of investigations at the Technical University of Denmark. The fatigue life of welded joints has been determined both experimentally and from a fracture mechanics analysis. In the experimental part of the investigation, fatigue test series with a total of 540 fatigue tests have been carried through on various types of welded plate test specimens and full-scale offshore tubular joints. The materials that have been used are either conventional structural steel or high-strength steel. The fatigue tests and the fracture mechanics analyses have been carried out using load histories, which are realistic in relation to the types of structures studied, i.e. primarily bridges, offshore structures and chimneys. In general, the test series carried through show a significant difference between constant amplitude and variable amplitude fatigue test results. Both the fracture mechanics analysis and the fatigue test results indicate that Miner’s rule, which is normally used in the design against fatigue in steel structures, may give results, which are unconservative, and that the validity of the results obtained from Miner’s rule will depend on the distribution of the load history in tension and compression.

Info:

Periodical:

Key Engineering Materials (Volumes 378-379)

Edited by:

Dr. T. S. Srivatsan, FASM, FASME

Pages:

3-16

DOI:

10.4028/www.scientific.net/KEM.378-379.3

Citation:

H. Agerskov "The Fatigue Behavior of Steel Structures under Random Loading ", Key Engineering Materials, Vols. 378-379, pp. 3-16, 2008

Online since:

March 2008

Authors:

Export:

Price:

$35.00

[1] H. Agerskov and J.B. Ibsø: An Investigation on Fatigue in Repair-Welded Tubular Joints in Offshore Structures. IIW Doc. XIII-1525-94, International Institute of Welding, Annual Assembly, Beijing, China, (1994).

[2] V. Askegaard: Prediction of Initial Crack Location in Welded Fatigue Test Specimens by the Thermoelastic Stress Analysis Technique. Report No. R 276, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1991).

[3] P. Stanley and W.K. Chan: Quantitative stress analysis by means of the thermoelastic effect. J. of Strain Analysis, Vol. 20, (3), pp.129-137, (1985).

[4] P. Stanley and W.K. Chan: A new experimental stress analysis technique of wide application. Proceedings of the VIII'th Int. Conf. on Exptl. Stress Analysis, Amsterdam, The Netherlands, (1986).

[5] R. Carlsen: Udmattelse i Stålbrodæk Udsat for Stokastisk Last, (Fatigue in Steel Bridge Deck Subjected to Stochastic Loading), in Danish, M. Sc. Thesis. Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1994).

[6] J.B. Ibsø and H. Agerskov: Fatigue Life of Offshore Steel Structures under Stochastic Loading. Report No. R 299, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1992).

[7] R.I. Petersen, H. Agerskov and L. Lopez Martinez: Fatigue Life of High-Strength Steel Offshore Tubular Joints. Report No. R 1, Dept. of Struct. Engrg. and Materials, Techn. Univ. of Denmark, Lyngby, Denmark, (1996).

[8] R.I. Petersen, H. Agerskov, L. Lopez Martinez and V. Askegaard: Fatigue Life of High-Strength Steel Plate Elements under Stochastic Loading. Report No. R 320, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1995).

[9] H. Gluver: One Step Markov Model for Extremes of Gaussian Processes. Report No. R 261, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1990).

[10] S. Krenk and H. Gluver: A Markov Matrix for Fatigue Load Simulation and Rainflow Range Evaluation. Proceedings of the Symposium on Stochastic Structural Dynamics, Urbana, Illinois, USA, (1988).

DOI: 10.1016/0167-4730(89)90025-8

[11] S. Esdahl and K.L. Jacobsen: Dynamik og Udmattelse i Stålskorstene, (Dynamics and Fatigue of Steel Chimneys), in Danish, M. Sc. Thesis. Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1995).

[12] P. Aarkrog: A Computer Program for Servo Controlled Fatigue Testing. Documentation and User Guide. Report No. R 253, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1990).

[13] H. Agerskov and J.B. Ibsø: Fatigue Life of Plate Elements with Welded Transverse Attachments Subjected to Stochastic Loading. Proceedings of the Nordic Conference on Fatigue. Edited by A.F. Blom, EMAS Publishers, West Midlands, England, (1993).

[14] J.A. Nielsen, H. Agerskov and T. Vejrum: Fatigue in Steel Highway Bridges under Random Loading. Report No. R 15, Dept. of Struct. Engrg. and Materials, Techn. Univ. of Denmark, Lyngby, Denmark, (1997).

[15] T. Vejrum and J.A. Nielsen: Udmattelse i Stålkonstruktioner Udsat for Stokastisk Last. Brolast, (Fatigue in Steel Structures Subjected to Stochastic Loading. Bridge Loading), in Danish, M. Sc. Thesis. Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1993).

[16] Fatigue Handbook. Offshore Steel Structures. Edited by A. Almar-Næss, Tapir Publishers, Trondheim, Norway, (1985).

[17] H. Agerskov and N.T. Pedersen: Fatigue Life of Offshore Steel Structures under Stochastic Loading. Journal of Structural Engineering, ASCE, Vol. 118, No. 8, pp.2101-2117, (1992).

DOI: 10.1061/(asce)0733-9445(1992)118:8(2101)

[18] J.B. Ibsø and H. Agerskov: Fatigue Life Prediction of Offshore Tubular Structures under Stochastic Loading. Proceedings of the Nordic Conference on Fatigue. Edited by A.F. Blom, EMAS Publishers, West Midlands, England, (1993).

[19] H. Agerskov, R.I. Petersen and L. Lopez Martinez: An Investigation on Fatigue in HighStrength Steel Offshore Structures. IIW Doc. XIII-1670-97, International Institute of Welding, Annual Assembly, San Francisco, USA, (1997).

[20] S. Håkansson and P.S. Hansen: Spændingsbestemmelse og Udmattelse i Stålbrodæk, (Stress Analysis and Fatigue in Steel Bridge Decks), in Danish, M. Sc. Thesis. Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1995).

[21] H. Agerskov and J.A. Nielsen: Fatigue in Steel Highway Bridges under Random Loading. Journal of Structural Engineering, ASCE, Vol. 125, No. 2, pp.152-162, (1999).

DOI: 10.1061/(asce)0733-9445(1999)125:2(152)

[22] J.B. Ibsø: Fatigue Life Prediction of Welded Joints Based on Fracture Mechanics and Crack Closure. Ph.D. Thesis. Report No. R 322, Dept. of Struct. Engrg., Techn. Univ. of Denmark, Lyngby, Denmark, (1995).

[23] J.B. Ibsø and H. Agerskov: An Analytical Model for Fatigue Life Prediction Based on Fracture Mechanics and Crack Closure. Journal of Constructional Steel Research, Vol. 37, No. 3, pp.229-261, (1996).

DOI: 10.1016/0143-974x(96)00006-5

[24] International Institute of Welding: Recommendations for Fatigue Design of Welded Joints and Components, IIW Doc. XIII-1965-03, (2006).

[25] European Committee for Standardization, CEN: Eurocode 3, Design of Steel Structures, Part 1- 9, Fatigue, (2005).

In order to see related information, you need to Login.