The AISI Direct Strength Method for Cold-Formed Steel Design: A Practicing Engineer's Introduction

2014 ◽  
Author(s):  
C. Grey ◽  
M. Detwiler
Keyword(s):  
Direct Strength Method ◽  
Cold Formed Steel ◽  
Steel Design

scholarly journals Compression Test on Cold-Formed Steel Built-Up Back-to-Back Channels Stub Columns

2011 ◽  
Vol 201-203 ◽  
pp. 2900-2903 ◽  
Author(s):  
Chui Huon Tina Ting ◽  
Hieng Ho Lau
Keyword(s):  
Compression Test ◽  
Failure Modes ◽  
Local Buckling ◽  
Effective Width ◽  
Test Results ◽  
Direct Strength Method ◽  
Cold Formed Steel ◽  
Stub Column ◽  
Hot Rolled ◽  
Stub Columns

Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been substantially taken from research in hot-rolled built-up members connected with bolts or welds [1]. The aim of this paper is to investigate on built-up back-to-back channels stub columns experimentally and theoretically using Effective Width Method and Direct Strength Method. Compression test was performed on 5 lipped channel and 5 back-to-back channels stub columns fabricated from cold-formed steel sheets of 1.2mm thicknesses. The test results indicated that local buckling is the dominant failure modes of stub columns. Therefore, Effective Width Method predicts the capacity of stub columns compared to Direct Strength Method. When compared to the average test results, results based on EWM are 5% higher while results based on DSM are 12% higher for stub column.

New developments in the direct strength method (DSM) for the design of cold-formed steel sections under localised loading

2017 ◽  
Vol 10 (3) ◽  
pp. 227-233 ◽  
Author(s):  
Van Vinh Nguyen ◽  
Gregory J. Hancock ◽  
Cao Hung Pham
Keyword(s):  
New Developments ◽  
Direct Strength Method ◽  
Steel Sections ◽  
Cold Formed Steel

Behaviour of cold-formed steel built-up I-section columns composed of four U-profiles

2018 ◽  
Vol 22 (3) ◽  
pp. 613-625 ◽  
Author(s):  
M Anbarasu ◽  
M Venkatesan
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Ultimate Strength ◽  
Element Model ◽  
Cross Sectional ◽  
Direct Strength Method ◽  
The North ◽  
Compression Members ◽  
Cross Sectional Dimension ◽  
Cold Formed Steel

This work reports numerical results concerning the cold-formed steel built-up I-section columns composed of four U-profiles under axial compression. A finite element model is developed by using the software program ABAQUS. The developed model includes geometric, material nonlinearities and geometric imperfections. The finite element model was verified against the experimental results reported in the cold-formed steel built-up open section columns. In the parametric study, the sections are analysed with several cross-sectional dimension ratios and lengths, in order to assess their influence on the buckling behaviour and ultimate strength of cold-formed steel built-up I-section columns. After presenting and discussing the numerical parametric results, the article shows that the current direct strength method in the North American Specification for cold-formed steel compression members design curve fails to predict adequately the ultimate strength of some of the columns analysed and addresses the modification proposed on current direct strength method curves, providing improved predictions of all the numerical ultimate strength available. The proposed method is also assessed by reliability analysis.

Neural Networks and Cold-formed Steel Design

2009 ◽  
Author(s):  
E.M.A. El-Kassas ◽  
R.I. Mackie ◽  
A.I. El-Sheikh
Keyword(s):  
Neural Networks ◽  
Cold Formed Steel ◽  
Steel Design

Cold-formed steel design and research in Germany

1993 ◽  
Vol 16 (1-4) ◽  
pp. 293-305
Author(s):  
Rolf Baehre
Keyword(s):  
Cold Formed Steel ◽  
Steel Design
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