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Residual stresses in welded I section steel members

  • Residual stresses have major influence on the stability of steel members. It is well-known that, due to the differences in manufacturing procedures, the residual stresses for welded and hot – rolled members are rather different. In the same way, despite several studies on residual stresses distribution and magnitude for hot-rolled members were already done, for prismatic and tapered welded I section steel members the investigation is still very scarce. In the current work, an experimental programme on the buckling resistance of tapered members, with different tapering ratios and section heights, was conducted and residual stress measurements were carried out using the sectioning method. Numerical simulations of the heat input during welding were also performed in order to predict the residual stress fields. A statistical analysis of the residual stresses distribution for welded I section members was performed, using the experimental and numerical results, as well as literature data. Systematized information on residual stressesResidual stresses have major influence on the stability of steel members. It is well-known that, due to the differences in manufacturing procedures, the residual stresses for welded and hot – rolled members are rather different. In the same way, despite several studies on residual stresses distribution and magnitude for hot-rolled members were already done, for prismatic and tapered welded I section steel members the investigation is still very scarce. In the current work, an experimental programme on the buckling resistance of tapered members, with different tapering ratios and section heights, was conducted and residual stress measurements were carried out using the sectioning method. Numerical simulations of the heat input during welding were also performed in order to predict the residual stress fields. A statistical analysis of the residual stresses distribution for welded I section members was performed, using the experimental and numerical results, as well as literature data. Systematized information on residual stresses distribution and magnitude was generated and some guidelines for the statistical characterization of residual stresses in welded members were proposed.show moreshow less

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Author: Trayana Tankova, Luís Simões da Silva, Marimuthu Balakrishnam, Dulce Rodrigues, Benjamin LaunertORCiD, Hartmut PasternakORCiD, Tin Yadanar Tun
DOI:https://doi.org/10.1016/j.engstruct.2019.109398
ISSN:0141-0296
Title of the source (English):Engineering Structures
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2019
Tag:Eurocode 3; Experimental tests; I section; Residual stresses; Stability; Steel; Welded sections; Welding simulation
Volume/Year:197
Number of pages:24
Article number:109398
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Stahl- und Holzbau
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