Effect of reduced joint strength and semi-rigid joints on cold-formed steel portal frames

Colin  Jackson; Andrzej Wrzesien; Ross P. Johnston; Asraf Uzzaman; James Lim

Effect of reduced joint strength and semi-rigid joints on cold-formed steel portal frames

Colin Jackson, Andrzej Wrzesien, Ross P. Johnston, Asraf Uzzaman, James Lim

Mechanical And Aerospace Engineering

Research output: Contribution to conference › Paper

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Abstract

This paper considers the effect of semi-rigid joints and finite connection length on the design of cold-formed steel portal frames sized using a rigid joint and full joint strength assumption, and whether it can offset the fact that the joints cannot sustain the full moment capacity of the sections. The paper shows that for frames of modest span (around 10 m), sized using a rigid joint and full joint strength assumption, that the frames are unsafe under gravity load and do not satisfy the ultimate limit state. Designers should therefore take the semi-rigidity and partial strength of the joints when analysing such frames, particularly when stressed skin action is also used in the design.

Original language	English
Number of pages	8
Publication status	Published - 3 Dec 2012
Event	6th International Conference on Coupled Instabilities in Metal Structures, CIMS 2012 - Glasgow, United Kingdom Duration: 3 Dec 2012 → 5 Dec 2012

Conference

Conference	6th International Conference on Coupled Instabilities in Metal Structures, CIMS 2012
Country/Territory	United Kingdom
City	Glasgow
Period	3/12/12 → 5/12/12

Keywords

joint strength
cold-formed steel
portal frames
finite element analysis

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Uzzaman A et al Pure Effect of reduced joint strength and semi rigid joints on cold formed steel portal frames Dec 2012Submitted manuscript, 2.16 MB

Cite this

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title = "Effect of reduced joint strength and semi-rigid joints on cold-formed steel portal frames",

abstract = "This paper considers the effect of semi-rigid joints and finite connection length on the design of cold-formed steel portal frames sized using a rigid joint and full joint strength assumption, and whether it can offset the fact that the joints cannot sustain the full moment capacity of the sections. The paper shows that for frames of modest span (around 10 m), sized using a rigid joint and full joint strength assumption, that the frames are unsafe under gravity load and do not satisfy the ultimate limit state. Designers should therefore take the semi-rigidity and partial strength of the joints when analysing such frames, particularly when stressed skin action is also used in the design. ",

keywords = "joint strength, cold-formed steel , portal frames , finite element analysis",

author = "Colin Jackson and Andrzej Wrzesien and Johnston, {Ross P.} and Asraf Uzzaman and James Lim",

year = "2012",

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T1 - Effect of reduced joint strength and semi-rigid joints on cold-formed steel portal frames

AU - Jackson, Colin

AU - Wrzesien, Andrzej

AU - Johnston, Ross P.

AU - Uzzaman, Asraf

AU - Lim, James

PY - 2012/12/3

Y1 - 2012/12/3

N2 - This paper considers the effect of semi-rigid joints and finite connection length on the design of cold-formed steel portal frames sized using a rigid joint and full joint strength assumption, and whether it can offset the fact that the joints cannot sustain the full moment capacity of the sections. The paper shows that for frames of modest span (around 10 m), sized using a rigid joint and full joint strength assumption, that the frames are unsafe under gravity load and do not satisfy the ultimate limit state. Designers should therefore take the semi-rigidity and partial strength of the joints when analysing such frames, particularly when stressed skin action is also used in the design.

AB - This paper considers the effect of semi-rigid joints and finite connection length on the design of cold-formed steel portal frames sized using a rigid joint and full joint strength assumption, and whether it can offset the fact that the joints cannot sustain the full moment capacity of the sections. The paper shows that for frames of modest span (around 10 m), sized using a rigid joint and full joint strength assumption, that the frames are unsafe under gravity load and do not satisfy the ultimate limit state. Designers should therefore take the semi-rigidity and partial strength of the joints when analysing such frames, particularly when stressed skin action is also used in the design.

KW - joint strength

KW - cold-formed steel

KW - portal frames

KW - finite element analysis

UR - http://www.cims2012.org/

M3 - Paper

T2 - 6th International Conference on Coupled Instabilities in Metal Structures, CIMS 2012

Y2 - 3 December 2012 through 5 December 2012

ER -

Effect of reduced joint strength and semi-rigid joints on cold-formed steel portal frames

Abstract

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Keywords

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