Strength analysis of eccentrically loaded thin-walled steel lipped C-profile columns

• Autorzy: Czechowski Leszek , Kotełko Maria , Jankowski Jacek , Ungureanu Viorel , Sanduly Annabella

Identyfikatory

DOI

10.24425/ace.2023.146082

Warianty tytułu

PL

Analiza nośności mimośrodowo obciążonego stalowego słupa o przekroju ceowym

• Języki publikacji: EN

Abstrakty

EN

The work includes the results of numerical, analytical-numerical and experimental study into the influence of load eccentricities with regard to major axis on post-buckling behaviour and load-carrying capacity of thin-walled cold-formed steel lipped channel section columns. The study was solved by using the finite element method (code Ansys) with taking into consideration a full material characteristics in logarithmic strain system and geometric nonlinearities. The analytical-numerical solution was based on Koiter’s theory with an application of finite difference method (FDM). Some chosen results of numerical simulations have been compared to experimental results. The deformations of columns were registered by means of Digital Image Correlation Aramis System (DICAS) to observe the maps and the magnitude of displacements for adequate point of a load. The analyses showed that the decrease in maximum load in a dependency on the eccentricity value can be even 3 times minor in a comparison to the load-carrying capacity of axially loaded column.

PL

Praca dotyczy analiz numerycznych, numeryczno-analitycznych i eksperymentalnych wpływu obciążeń mimośrodowych względem osi centralnej Imax na pokrytyczne zachowanie i nośność cienkościennych zimno formowanych stalowych słupów o przekroju otwartym z żebrami końcowymi w pasach. Problem został rozwiązany stosując metodę elementów skończonych (program Ansys) z uwzględnieniem pełnych charakterystyk materiałowych w układnie logarytmicznym oraz nieliniowości geometrycznych. Rozwiązanie analityczno-numeryczne zostało oparte o teorię Koitera z zastosowaniem metody różnic skończonych. Wybrane wyniki symulacji zostały porównane z wynikami empirycznymi. Deformacje słupów podczas wykonywania badań doświadczalnych były rejestrowane optyczną metodą cyfrowej korelacji obrazów za pomocą systemu Aramis w celu określenia map deformacji i wielkości przemieszczeń punktów dla określonego obciążenia. Wyniki analizy pokazały, iż spadek w maksymalnych siłach w zależności od przesunięcia siły ściskającej względem osi centralnej słupa, może być nawet trzykrotny w odniesieniu do nośności ceowników ściskanych osiowo.

Słowa kluczowe

EN

thin-walled structure; load-carrying capacity; eccentric load; C-profile; Koiter’s theory

PL

konstrukcja cienkościenna; nośność; obciążenie mimośrodowe; ceownik; teoria Koitera

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2023
• Tom: Vol. 69, nr 3
• Strony: 301--316
• Opis fizyczny: Bibliogr. 24 poz., il., tab.

Twórcy

autor

Czechowski Leszek

• Lodz University of Technology, Faculty of Mechanical Engineering, Lodz, Poland

• https://orcid.org/0000-0002-4718-6215

autor

Kotełko Maria

• Lodz University of Technology, Faculty of Mechanical Engineering, Lodz, Poland

• https://orcid.org/0000-0001-7784-4349

autor

Jankowski Jacek

• Lodz University of Technology, Faculty of Mechanical Engineering, Lodz, Poland

• https://orcid.org/0000-0002-9628-2799

autor

Ungureanu Viorel

• Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara, Romania

• https://orcid.org/0000-0002-5826-9518

autor

Sanduly Annabella

• Lodz University of Technology, Faculty of Mechanical Engineering, Lodz, Poland (student)

• https://orcid.org/0000-0003-0568-3181

Bibliografia

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