<abstract xmlns="http://www.w3.org/1999/xhtml">

Stability checking is an essential element of the dimensioning of steel frame structures. One of the stability checking methods allowed by EN 1993-1-1 is the so-called general method of assessing structural stability, based on buckling curves and relative structure slenderness 
<inline-formula>
<alternatives>
<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_sgem-2021-0022_ineq_001.png"></inline-graphic>
<math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mover accent="true"><mo>λ</mo><mo>¯</mo></mover><mrow><mi mathvariant="italic">op</mi></mrow></msub></mrow></math>
<tex-math>{\bar \lambda _{op}}</tex-math>
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 usually determined through numerical analyses. But this method is not widely used because of the limited computing capabilities of the engineering programs dedicated to static load analyses and difficulties in interpreting the results of the computations. The commonly used computer programs enable one to determine the shape of buckling and critical load amplifier <italic>αcr</italic>, from which one cannot directly determine the risk of buckling of a real structure. This paper presents a modified and innovative approach to the general method of assessing structural stability, which uses only three parameters, that is, the type of cross section, cross-section strength utilisation and <italic>αcr</italic>, to determine a member’s/structure’s bearing capacity mobilisation from the stability condition. The problem solution is presented in the form of simple formulas and legible diagrams. Finally, synthetic conclusions are formulated.
</abstract>

Stability checking is an essential element of the dimensioning of steel frame structures. One of the stability checking methods allowed by EN 1993-1-1 is the so-called general method of assessing structural stability, based on buckling curves and relative structure slenderness 



λ¯op
{\bar \lambda _{op}}


 usually determined through numerical analyses. But this method is not widely used because of the limited computing capabilities of the engineering programs dedicated to static load analyses and difficulties in interpreting the results of the computations. The commonly used computer programs enable one to determine the shape of buckling and critical load amplifier αcr, from which one cannot directly determine the risk of buckling of a real structure. This paper presents a modified and innovative approach to the general method of assessing structural stability, which uses only three parameters, that is, the type of cross section, cross-section strength utilisation and αcr, to determine a member’s/structure’s bearing capacity mobilisation from the stability condition. The problem solution is presented in the form of simple formulas and legible diagrams. Finally, synthetic conclusions are formulated.

Innovative Look at the ‘General Method’ of Assessing Buckling Resistance of Steel Structures

Wrocław University of Science and Technology

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution 4.0 International License.

Stability checking is an essential element of the dimensioning of steel frame structures. One of the stability checking methods allowed by EN 1993-1-1 is the...

Innovative Look at the ‘General Method’ of Assessing Buckling Resistance of Steel Structures

Article Category: Original Study

Published Online: Oct 26, 2021

Page range: 337 - 345

Received: May 16, 2021

Accepted: Sep 07, 2021

DOI: https://doi.org/10.2478/sgem-2021-0022

Keywords
steel structures, stability, buckling, general method

© 2021 Dariusz Czepiżak, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

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Figure 7

Innovative Look at the ‘General Method’ of Assessing Buckling Resistance of Steel Structures

Article Category: Original Study

Published Online: Oct 26, 2021

Page range: 337 - 345

Received: May 16, 2021

Accepted: Sep 07, 2021

DOI: https://doi.org/10.2478/sgem-2021-0022

Keywordssteel structures, stability, buckling, general method

© 2021 Dariusz Czepiżak, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Keywords
steel structures, stability, buckling, general method