Elastic critical moment for bisymmetric steel profiles and its sensitivity by the finite difference method

• Autorzy: Kamiński M. , Supeł Ł.

Identyfikatory

DOI

10.1515/ijame-2016-0003

• Języki publikacji: EN

Abstrakty

EN

It is widely known that lateral-torsional buckling of a member under bending and warping restraints of its cross-sections in the steel structures are crucial for estimation of their safety and durability. Although engineering codes for steel and aluminum structures support the designer with the additional analytical expressions depending even on the boundary conditions and internal forces diagrams, one may apply alternatively the traditional Finite Element or Finite Difference Methods (FEM, FDM) to determine the so-called critical moment representing this phenomenon. The principal purpose of this work is to compare three different ways of determination of critical moment, also in the context of structural sensitivity analysis with respect to the structural element length. Sensitivity gradients are determined by the use of both analytical and the central finite difference scheme here and contrasted also for analytical, FEM as well as FDM approaches. Computational study is provided for the entire family of the steel I- and H - beams available for the practitioners in this area, and is a basis for further stochastic reliability analysis as well as durability prediction including possible corrosion progress.

Słowa kluczowe

EN

critical moment; finite difference method; sensitivity analysis; thin walled structures; finite element method

PL

moment krytyczny; konstrukcja murowana; metoda elementów skończonych

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2016
• Tom: Vol. 21, no. 1
• Strony: 37--59
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wykr.

Twórcy

autor

Kamiński M.

• Department of Structural Mechanics Faculty of Civil Engineering Architecture and Environmental Engineering Al. Politechniki 6, 90-924 Łódź, POLAND

autor

Supeł Ł.

• Department of Structural Mechanics Faculty of Civil Engineering Architecture and Environmental Engineering Al. Politechniki 6, 90-924 Łódź, POLAND

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę