Collapse assessment of steel moment resisting frames designed with deep members
Collapse assessment of steel moment resisting frames designed with deep members
This paper investigates the cyclic behaviour of three deep column sizes commonly used in construction practice of steel Special Moment Frames (SMFs) through detailed finite element (FE) analysis. Emphasis is placed on the effect of the section slenderness and axial load level on the cyclic deterioration in strength and stiffness of deep columns since their performance is directly related to the collapse potential of SMFs designed in seismic regions. The FE simulations demonstrated that column sections with large web slenderness (close to the web compactness limit requirements for highly ductile members per AISC-360-10) have a high rate of cyclic deterioration in strength and axial shortening due to severe web local buckling. These effects amplify with higher axial load demands. It is also found that axial force demands on lateral braces, which are used to prevent lateral torsional buckling of deep columns, exceed their design capacity at relatively low story drift ratios even if they were designed based on current seismic code requirements.
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b
30 August 2013
Elkady, Ahmed
8e55de89-dff4-4f84-90ed-6af476e328a8
Lignos, Dimitrios G.
9f55ad65-7b12-4ad6-972c-5a967ec0497b
Elkady, Ahmed and Lignos, Dimitrios G.
(2013)
Collapse assessment of steel moment resisting frames designed with deep members.
Adam, C., Heuer, R., Lenhardt, W. and Schranz, C.
(eds.)
In Vienna congress on recent advances in earthquake engineering and structural dynamics.
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Conference or Workshop Item
(Paper)
Abstract
This paper investigates the cyclic behaviour of three deep column sizes commonly used in construction practice of steel Special Moment Frames (SMFs) through detailed finite element (FE) analysis. Emphasis is placed on the effect of the section slenderness and axial load level on the cyclic deterioration in strength and stiffness of deep columns since their performance is directly related to the collapse potential of SMFs designed in seismic regions. The FE simulations demonstrated that column sections with large web slenderness (close to the web compactness limit requirements for highly ductile members per AISC-360-10) have a high rate of cyclic deterioration in strength and axial shortening due to severe web local buckling. These effects amplify with higher axial load demands. It is also found that axial force demands on lateral braces, which are used to prevent lateral torsional buckling of deep columns, exceed their design capacity at relatively low story drift ratios even if they were designed based on current seismic code requirements.
Text
2013_Elkady_Lignos_-_Collapse_Assessment_of_Steel_Moment_Resisting_Frames_Designed_with_Deep_Members
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Published date: 30 August 2013
Venue - Dates:
Vienna Congress on Recent Advances in Earthquake Engineering and Structural Dynamics 2013, , Vienna, Austria, 2013-08-28 - 2013-08-30
Identifiers
Local EPrints ID: 499229
URI: http://eprints.soton.ac.uk/id/eprint/499229
PURE UUID: b79687d2-1e7a-41ea-b20f-fd07845a8b02
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Date deposited: 12 Mar 2025 17:42
Last modified: 22 Aug 2025 02:27
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Contributors
Author:
Dimitrios G. Lignos
Editor:
C. Adam
Editor:
R. Heuer
Editor:
W. Lenhardt
Editor:
C. Schranz
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