Imperfection sensitivity analysis of steel columns at ultimate limit state

• Autorzy: Kala Z. , Valeš J.

Identyfikatory

DOI

10.1016/j.acme.2018.01.009

• Języki publikacji: EN

Abstrakty

EN

The present paper applies Sobol's variance-based global sensitivity analysis (SSA) to quantify the contribution of input imperfections to the load-carrying capacity (LCC) of an IPN 200 steel compressed member. LCC is evaluated using the geometrically and materially non-linear finite element solution with regard to the effects of initial random imperfections including residual stresses. Comparison of results of SSA for (i) buckling about the minor principal axis, (ii) buckling about the major principal axis and (iii) lateral–torsional buckling due to bending moment is performed on the non-dimensional slenderness interval of 0–2. SSA for (i) and (ii) is performed for steel grade (a) S235 and (b) S355, SSA for (iii) is performed only for steel grade S235. SSA found similarities in results (ia) and (ib), (iia) and (iib) and identified significant differences between results (ia) and (iiia), (iia) and (iiia), where sensitivity to the initial axial curvature is more than two times higher in (ia) than in (iiia). The relationships between the effects of initial imperfections on LCC and the design criteria of reliability of Eurocode 3 are discussed.

Słowa kluczowe

EN

Sobol sensitivity analysis; steel structure; buckling; imperfections; finite element

PL

konstrukcja stalowa; wyboczenie; naprężenie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 18, no. 4
• Strony: 1207--1218
• Opis fizyczny: Bibliogr. 75 poz., rys., tab., wykr.

Twórcy

autor

Kala Z.

• Brno University of Technology, Faculty of Civil Engineering, Department of Structural Mechanics, Veveri Street 95, 602 00 Brno, Czech Republic

autor

Valeš J.

• Brno University of Technology, Faculty of Civil Engineering, Department of Structural Mechanics, Veveri Street 95, 602 00 Brno, Czech Republic

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)