Journal ArticleDOI
Nonlinear analyses of thin-walled channel section columns
TLDR
In this article, a detailed comparison of nonlinear analyses of thin-walled channel section columns with tests is presented, where the columns are analysed as beam-columns having nonlinear constitutive relationships.Abstract:
The paper presents a detailed comparison of nonlinear analyses of thin-walled channel section columns with tests. The columns are analysed as beam-columns having nonlinear constitutive relationships. The constitutive relationships are obtained firstly, by assuming elastic material behaviour and allowing local buckling of both flanges and web, and secondly, by assuming elastic-plastic material behaviour and confining local buckling deformations to the web. Based on the comparison, including theoretical and experimental load-shortening and load-deflection curves, it is concluded that the nonlinear theory generally closely agrees with the tests. The paper also investigates the applicability of combining an elastic nonlinear analysis with a spatial plastic mechanism analysis to describe the structural behaviour both before and after the ultimate load. The question of when this combination can be expected to accurately describe the column behaviour over the full loading range is discussed. A separate section compares theoretical ultimate loads with test strengths. The nonlinear analyses employed in the paper provide ultimate loads which agree with the test strengths to within 2% on average where primary local buckling occurs in the web of the channels, and 11% on average where primary local buckling occurs in the flanges of the channels.read more
Citations
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Journal ArticleDOI
Yield line mechanism analysis of steel members and connections
TL;DR: Yield line mechanism analysis has been widely used to study steel members and connections that involve local collapse mechanisms as mentioned in this paper, where the fundamental requirement is to determine the reduced plastic moment capacity of an inclined yield line under axial force.
České vysoké učení technické v praze
TL;DR: The present work deals with outlining the possibilities of testing students’ knowledge with the help of the testing module of LMS Moodle, one of the top systems for online education.
Journal ArticleDOI
A theoretical analysis of the plastic-moment capacity of an inclined yield line under axial force
TL;DR: In this paper, the effect of the twisting moment on the reduction of the plastic-moment capacity of an inclined yield line under axial force was considered. And lower bound solutions based on the Tresca yield criterion and the von Mises yield criterion were derived to determine the reduced PLM capacity.
Journal ArticleDOI
Bifurcation of singly symmetric columns
Ben Young,Kim J.R. Rasmussen +1 more
TL;DR: In this article, the fundamental and bifurcated states of members with singly symmetric cross-sections that locally buckle in the fundamental state were derived and the results were shown to be sensitive to the magnitudes of local and overall geometric imperfections.
Journal ArticleDOI
The flexural behaviour of fixed-ended channel section columns
TL;DR: In this paper, a study of the behavior of thin-walled channel sections compressed between fixed ends is presented, where the authors show that the strength of a fixed-ended channel section column exceeds that of a pin-ended column of the same effective length.
References
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TL;DR: In this paper, the effect of lateral and torsional restraints on the buckling modes of I-beams is investigated and a design chart for the local buckling stress of Ibeams subjected to major axis moment is presented.
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