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Romanian Journal of Transport Infrastructure

The Journal of Technical University of Civil Engineering Bucharest

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2286-2218
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New And Existing Bridge Constructions - Increase of Fatigue Strength of Welded Joints by High Frequency Mechanical Impact Treatment

Thomas Ummenhofer
  • Head of Department, Chair for Steel Structures, Univ.-Prof. Dr.- Ing., KIT Steel and Lightweight Structures, Research Center for Steel, Timber and Masonry, Tel. +49 721 608 42215, Otto-Ammann-Platz 1,5 & 7, 76131 Karlsruhe, Germany
  • Email:
/ Philipp Weidner
  • Research Assistant, Dipl.-Ing., KIT Steel and Lightweight Structures, Research Center for Steel, Timber and Masonry, Tel. +49 721 608 42215, Otto-Ammann-Platz 1,5 & 7, 76131 Karlsruhe, Germany
  • Email:
/ Tim Zinke
  • Research Assistant, Dipl.-Ing. Dipl.-Wirtsch.-Ing KIT Steel and Lightweight Structures, Research Center for Steel, Timber and Masonry, Tel. +49 721 608 42215, Otto-Ammann-Platz 1,5 & 7, 76131 Karlsruhe, Germany
  • Email:
Published Online: 2015-02-06 | DOI: https://doi.org/10.1515/rjti-2015-0013

Abstract

Numerous studies at KIT prove that high frequency mechanical impact (HFMI) treatment is an efficient method for increasing the fatigue strength of welded steel structures. Within different research projects it was found that HFMI-methods can be used successfully for new and existing structures in order to extend the fatigue life. This paper gives an overview of the current status of existing steel bridges in Germany regarding aspects like bridge age distributions and traffic loads. Based on that overview welded joints susceptible to fatigue failure are identified. Using component-like small scale specimens, HFMI-methods were investigated within the objective of implementing an effective application for new and existing structures. Applying the fatigue test data observed, existing design proposals are evaluated and design recommendations for HFMI-treated joints are given. As a result of the research work, a transfer into practice has been realized and different applications are illustrated using the example of bridge constructions made of steel.

Keywords: fatigue; welded structures; life-cycle; rehabilitation; high frequency mechanical impact (HFMI); fatigue strength improvement

References

  • [1]. BMVBS: “Bericht über die Qualität, Dauerhaftigkeit und Sicherheit von Spannbetonbrücken”. Vorlage an den Ausschuss für Verkehr, Bau und Stadtentwicklung des Deutschen Bundestages, Berlin, 2006.

  • [2]. DIN EN 1993-1-9, 2010-12 “Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1-9: Ermüdung”.

  • [3]. A. DÜRR: “Zur Ermüdungsfestigkeit von Schweißkonstruktionen aus höherfesten Baustählen bei Anwendung von UIT-Nachbehandlung”. Dissertation, Universität Stuttgart, Institut für Konstruktion und Entwurf, 2007.

  • [4]. P.J. HAAGENSEN, MADDOX, S. J.: “IIW recommendations on post weld fatigue life improvement of steel and aluminium structures”. IIW document XIII-2200r7-07, 2010.

  • [5]. A. HOBBACHER: “Recommendations for Fatigue Design of Welded Joints and Components”. IIW document IIW-1823-07 ex XIII-2151r4-07/XV-1254r4-07, International Institute of Welding, December 2008.

  • [6]. G. MARQUIS, Z. BARSOUM: “Fatigue Strength Improvement of Steel Structures by High Frequency Mechanical Impact: Proposed Procedures and Quality Assurance Guidelines”. IIW document XIII-2453r1-13, International Institute of Welding, 2013.

  • [7]. G.B. MARQUIS, E. MIKKOLA, H.C. YILDIRIM, Z. BARSOUM: “Fatigue strength improvement of steel structures by high frequency mechanical impact: Proposed fatigue assessment guidelines”. IIW Document XIII-2452r1-13, International Institute of Welding, 2013.

  • [8]. T. NEUMANN, P. HAARDT: “Intelligent Bridges - Adaptive Systems for Information and Holistic Evaluation in Real Time”. Proceedings of the Sixth International Conference on Bridge Maintenance, Safety and Management, Stresa, Italy, 8-12 July, 2012.

  • [9]. T. NITSCHKE-PAGEL, DILGER, K., WEICH, I., UMMENHOFER, T.: “Residual stresses and near surface material condition of welded high strength steels after high frequency mechanical post-weld treatments”. IIW-Document XIII-2153-07, International Institute of Welding, 2007.

  • [10]. R. PUTHLI et al.: “Detaillösungen bei Ermüdungsfragen und dem Einsatz hochfester Stähle bei Offshore Windenergieanlagen”. Forschung für die Praxis P633, FORSCHUNGSVEREINIGUNG STAHLANWENDUNG E.V (FOSTA), VERLAG UND VERTRIEBSGESELLSCHAFT MBH, Düsseldorf, 2008.

  • [11]. T. UMMENHOFER et al.: “REFRESH - Lebensdauerverlängerung bestehender und neuer geschweißter Stahlkonstruktionen”. Forschung für die Praxis P702, FORSCHUNGSVEREINIGUNG STAHLANWENDUNG E.V (FOSTA), VERLAG UND VERTRIEBSGESELLSCHAFT MBH, Düsseldorf, 2011.

  • [12]. T. UMMENHOFER, S. HERION, R. PUTHLI, P. WEIDNER: “Effects of post weld treatment and loading condition on the fatigue life of ultra high strength steels”. Proceedings of the the Twenty-First International Offshore and Polar Engineering Conference (ISOPE-2011), Maui, Hawaii, USA, June 19 - 24, 2011.

  • [13]. T. UMMENHOFER, WEICH, I., NITSCHKE-PAGEL, T.: “Lebens- und Restlebensdauerverlängerung geschweißter Windenergieanlagentürme und anderer Stahlkonstruktionen durch Schweißnahtnachbehandlung”. Stahlbau 74 (2005), 412-422.

  • [14]. I. WEICH: “Ermüdungsverhalten mechanisch nachbehandelter Schweißverbindungen in Abhängigkeit des Randschichtzustands”. Dissertation, Technische Universität Braunschweig, 2009.

  • [15]. I. WEICH: “Granjon Prize Category C: Edge layer condition and fatigue strength of welds improved by mechanical post weld treatment”. IIW Document XIII-2265-09, International Institute of Welding, 2009.

  • [16]. I. WEICH, UMMENHOFER, T., NITSCHKE-PAGEL, TH., DILGER, K., ESLAMI, H.: “Fatigue behaviour of welded high-strength steels after high frequency mechanical postweld treatments”. Welding in the World (2009) / International Institute of Welding (IIW) Bd. 53 (2009), R322-R332.

  • [17]. P. WEIDNER, S. HERION, R. PUTHLI, T. UMMENHOFER: “Lebensdauerverlängerung von geschweißten Verbindungen aus Rundhohlprofilen (Extension of the fatigue life of welded joints made of circular hollow sections)”. Stahlbau 80 (2011), 502-512.

  • [18]. H.C. YILDIRIM, G.B. MARQUIS: “Fatigue strength improvement factors for high strength steel welded joints treated by high frequency mechanical impact”. International Journal of Fatigue 44 (2012), 168-176. [Web of Science]

About the article

Published Online: 2015-02-06

Published in Print: 2013-07-01



Citation Information: Romanian Journal of Transport Infrastructure, ISSN (Online) 2286-2218, DOI: https://doi.org/10.1515/rjti-2015-0013. Export Citation

© 2015. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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