Detail publikace

Imperfection sensitivity analysis of steel columns at ultimate limit state

KALA, Z. VALEŠ, J.

Originální název

Imperfection sensitivity analysis of steel columns at ultimate limit state

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Sobol sensitivity analysis, Steel structure, Buckling, Imperfections, Finite element

Autoři

KALA, Z.; VALEŠ, J.

Vydáno

1. 10. 2018

ISSN

1644-9665

Periodikum

ARCH CIV MECH ENG

Ročník

18

Číslo

4

Stát

Polská republika

Strany od

1207

Strany do

1218

Strany počet

12

BibTex

@article{BUT151670,
  author="Zdeněk {Kala} and Jan {Valeš}",
  title="Imperfection sensitivity analysis of steel columns at ultimate limit state",
  journal="ARCH CIV MECH ENG",
  year="2018",
  volume="18",
  number="4",
  pages="1207--1218",
  doi="10.1016/j.acme.2018.01.009",
  issn="1644-9665"
}