The continuous strength method for the design of cold-formed steel non-slender tubular cross-sections

2018 ◽  
Vol 175 ◽  
pp. 549-564 ◽  
Author(s):  
Xiang Yun ◽  
Leroy Gardner
Keyword(s):  
Cross Sections ◽  
Cold Formed Steel

Optimization of cold-formed steel pallet racking cross-sections for flexural–torsional buckling with constraints on the geometry

2009 ◽  
Vol 31 (11) ◽  
pp. 2711-2722 ◽  
Author(s):  
M.M. Pastor ◽  
M. Casafont ◽  
E. Chillarón ◽  
A. Lusa ◽  
F. Roure ◽  
...  
Keyword(s):  
Cross Sections ◽  
Torsional Buckling ◽  
Cold Formed Steel ◽  
Flexural Torsional Buckling

scholarly journals Buckling behavior of cold-formed steel columns at both ambient temperature and simulated fire conditions

Fire Research ◽  
2016 ◽  
Author(s):  
Hélder D. Craveiro ◽  
João Paulo C. Rodrigues ◽  
Luís M. Laím
Keyword(s):  
Experimental Investigation ◽  
Ambient Temperature ◽  
Cross Sections ◽  
Failure Modes ◽  
Steel Columns ◽  
Buckling Behavior ◽  
Wide Range ◽  
Cold Formed Steel ◽  
Simulated Fire ◽  
Fire Conditions

Cold-formed steel (CFS) profiles with a wide range of cross-section shapes are commonly used in building construction industry. Nowadays several cross-sections can be built using the available standard single sections (C, U, Σ, etc.), namely open built-up and closed built-up cross-sections. This paper reports an extensive experimental investigation on the behavior of single and built-up cold-formed steel columns at both ambient and simulated fire conditions considering the effect of restraint to thermal elongation. The buckling behavior, ultimate loads and failure modes, of different types of CFS columns at both ambient and simulated fire conditions with restraint to thermal elongation, are presented and compared. Regarding the buckling tests at ambient temperature it was observed that the use of built-up cross-sections ensures significantly higher values of buckling loads. Especially for the built-up cross-sections the failure modes were characterized by the interaction of individual buckling modes, namely flexural about the minor axis, distortional and local buckling. Regarding the fire tests, it is clear that the same levels of restraint used in the experimental investigation induce different rates in the generated restraining forces due to thermal elongation of the columns. Another conclusion that can be drawn from the results is that by increasing the level of restraint to thermal elongation the failure of the columns is controlled by the generated restraining forces, whereas for lower levels of restraint the temperature plays a more important role. Hence, higher levels of imposed restraint to thermal elongation will lead to higher values of generated restraining forces and eventually to lower values of critical temperature and time.

Optimal folding of cold formed steel cross sections under compression

2014 ◽  
Vol 76 ◽  
pp. 145-156 ◽  
Author(s):  
M. Moharrami ◽  
A. Louhghalam ◽  
M. Tootkaboni
Keyword(s):  
Cross Sections ◽  
Cold Formed Steel

scholarly journals Analysis of cold formed steel sheet pile for earth retaining wall

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
C. Veena ◽  
S Saravanan ◽  
Robin Davis P. ◽  
Nandakumar Gopalan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Cross Sections ◽  
Failure Load ◽  
Unit Cell ◽  
Bending Stress ◽  
Sheet Pile ◽  
Element Analysis ◽  
Cold Formed Steel

Failure loads of sheet pile having various profiles such as U, Z and Omega/Hat profiles under compression was carried out by using equations of strength of materials and compared the failure load under various modes such as Euler’s buckling, torsional buckling and failure load due to yielding. Compared the strength of various profiles under flexure by using finite element analysis. Sheet pile can be analyzed as a unit cell for the simplified finite element analysis. For selecting the unit cell sheet pile with omega/Hat section was analyzed for profile containing one to eight numbers and checked the convergence of bending stress and maximum lateral deflection. Interlocks were analyzed for three different conditions such as plane interlock, interlock filled with bitumen and welded interlock. Location of interlock and neutral axis of the wall will affect the stability of the structure. Sheet piles with various cross sections were analyzed and studied the shear stress and bending stress along the cross section. From the structural performance of various cross sections omega/hat section can be considered as the most efficient cross section for the cold formed steel sheet pile because of its more load carrying capacity under compression and high torsion resistance and less bending stress. Results from the finite element analysis for the selection of unit cell shows that the stress and deflection value was converge at the sheet pile having 6 numbers of profiles. Keywords: sheet piles, building, resistance.

scholarly journals Experimental - theoretical study of axially compressed cold formed steel profiles

2011 ◽  
Vol 9 (3) ◽  
pp. 367-378
Author(s):  
Miroslav Besevic ◽  
Danijel Kukaras
Keyword(s):  
Numerical Analysis ◽  
Bearing Capacity ◽  
Cross Sections ◽  
High Strength ◽  
Static And Dynamic Analysis ◽  
Finite Element Software ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Methods Numerical

Analysis of axially compressed steel members made of cold formed profiles presented in this paper was conducted through both experimental and numerical methods. Numerical analysis was conducted by means of "PAK" finite element software designed for nonlinear static and dynamic analysis of structures. Results of numerical analysis included ultimate bearing capacity with corresponding middle section force-deflection graphs and buckling curves. Extensive experimental investigation were also concentrated on determination of bearing capacity and buckling curves. Experiments were conducted on five series with six specimens each for slenderness values of 50, 70, 90, 110 and 120. Compressed simply supported members were analyzed on Amsler Spherical pin support with unique electronical equipment and software. Besides determination of forcedeflection curves, strains were measured in 18 or 12 cross sections along the height of the members. Analysis included comparisons with results obtained by different authors in this field recently published in international journals. Special attention was dedicated to experiments conducted on high strength and stainless steel members.

Cold-formed steel columns made with open cross-sections subjected to fire

2014 ◽  
Vol 85 ◽  
pp. 1-14 ◽  
Author(s):  
Hélder D. Craveiro ◽  
João Paulo C. Rodrigues ◽  
Luis Laím
Keyword(s):  
Cross Sections ◽  
Steel Columns ◽  
Cold Formed Steel
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