Multiaxial fatigue criteria for prestressed strengthening of steel connections

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

Externe Organisationen

  • Eidgenössische Materialprüfungs- und Forschungsanstalt (EMPA)
  • Eidgenössische Technische Hochschule Lausanne (ETHL)
  • Imperial College London
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Details

OriginalspracheEnglisch
Aufsatznummer106470
FachzeitschriftInternational journal of fatigue
Jahrgang153
PublikationsstatusVeröffentlicht - Dez. 2021
Extern publiziertJa

Abstract

In this study, the high-cycle fatigue behavior of bridge connections subjected to distortion-induced loadings (generating multiaxial stresses) and strengthened with prestressed elements were experimentally investigated. Thereafter, appropriate critical plane-based multiaxial fatigue thresholds based on the modified Wohler curve method (MWCM) and Fatemi-Socie's (FS) criteria were used to predict the initiation of cracks in the angles considering the estimated fully reversed uniaxial and shear fatigue limits as well as residual stresses. The prestressed strengthening system was effective in reducing the mean values as a result of the prestressing force, enabling a shift in the stress state to below the initiation threshold.

ASJC Scopus Sachgebiete

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Multiaxial fatigue criteria for prestressed strengthening of steel connections. / Heydarinouri, Hossein; Nussbaumer, Alain; Motavalli, Masoud et al.
in: International journal of fatigue, Jahrgang 153, 106470, 12.2021.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Heydarinouri H, Nussbaumer A, Motavalli M, Ghafoori E. Multiaxial fatigue criteria for prestressed strengthening of steel connections. International journal of fatigue. 2021 Dez;153:106470. doi: 10.1016/j.ijfatigue.2021.106470
Heydarinouri, Hossein ; Nussbaumer, Alain ; Motavalli, Masoud et al. / Multiaxial fatigue criteria for prestressed strengthening of steel connections. in: International journal of fatigue. 2021 ; Jahrgang 153.
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abstract = "In this study, the high-cycle fatigue behavior of bridge connections subjected to distortion-induced loadings (generating multiaxial stresses) and strengthened with prestressed elements were experimentally investigated. Thereafter, appropriate critical plane-based multiaxial fatigue thresholds based on the modified Wohler curve method (MWCM) and Fatemi-Socie's (FS) criteria were used to predict the initiation of cracks in the angles considering the estimated fully reversed uniaxial and shear fatigue limits as well as residual stresses. The prestressed strengthening system was effective in reducing the mean values as a result of the prestressing force, enabling a shift in the stress state to below the initiation threshold.",
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AU - Heydarinouri, Hossein

AU - Nussbaumer, Alain

AU - Motavalli, Masoud

AU - Ghafoori, Elyas

N1 - Funding Information: The authors acknowledge the Innosuisse Swiss Innovation Agency (Grant ID: 19240.1 PFIW-IW) for funding this research project. The financial and technical support from the project partners, namely S&P Clever Reinforcement Company AG, Switzerland; the Swiss Federal Railways (SBB) AG, Bern; and dsp Ingenieure + Planer AG Engineering Office, Uster, Switzerland are highly appreciated. Special thanks go to the teams of the Structural Engineering Research Laboratory of Empa (Dübendorf, Switzerland). The authors also appreciate Dr. Hans-Jakob Schindler at Mat-Tec AG, Switzerland, for his support in measuring the residual stresses. Publisher Copyright: © 2021 The Author(s)

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N2 - In this study, the high-cycle fatigue behavior of bridge connections subjected to distortion-induced loadings (generating multiaxial stresses) and strengthened with prestressed elements were experimentally investigated. Thereafter, appropriate critical plane-based multiaxial fatigue thresholds based on the modified Wohler curve method (MWCM) and Fatemi-Socie's (FS) criteria were used to predict the initiation of cracks in the angles considering the estimated fully reversed uniaxial and shear fatigue limits as well as residual stresses. The prestressed strengthening system was effective in reducing the mean values as a result of the prestressing force, enabling a shift in the stress state to below the initiation threshold.

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KW - Angle connections

KW - Crack initiation

KW - Critical plane approach

KW - Distortion-induced loading

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