Plastic mechanisms database for thin-walled cold-formed steel members in compression and bending

2010 ◽  
Vol 48 (10-11) ◽  
pp. 818-826 ◽  
Author(s):  
V. Ungureanu ◽  
M. KoteŁko ◽  
R.J. Mania ◽  
D. Dubina
Keyword(s):  
Steel Members ◽  
Cold Formed Steel ◽  
Thin Walled

scholarly journals Behaviour of thin-walled cold-formed steel members in eccentric compression

2018 ◽  
Author(s):  
Viorel Ungureanu ◽  
Maria Kotełko ◽  
Łukasz Borkowski ◽  
Jan Grudziecki
Keyword(s):  
Eccentric Compression ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Thin Walled

scholarly journals Koiter Asymptotic Analysis Of Thin-Walled Cold-Formed Steel Members

2015 ◽  
Vol 9 (4) ◽  
pp. 245-251 ◽  
Author(s):  
Viorel Ungureanu ◽  
Dan Dubina ◽  
Andrei Crisan ◽  
Antonio Madeo ◽  
Giuseppe Zagari ◽  
...  
Keyword(s):  
Experimental Study ◽  
Statistical Evaluation ◽  
Computational Cost ◽  
Limit Load ◽  
Imperfection Sensitivity ◽  
Critical Buckling Load ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Thin Walled ◽  
Low Computational Cost

Abstract An imperfection sensitivity analysis of cold-formed steel members in compression is presented. The analysis is based on Koiter’s approach and Monte Carlo simulation. If the modes interaction is correctly accounted, than the limit load and the erosion of critical buckling load can be easily evaluated. Thousands of imperfection can be analysed with very low computational cost and an effective statistical evaluation of limit performance can be carried out. The analysis is done on pallet rack uprights in compression, based on an intensive experimental study carried out at the Politehnica University of Timisoara.

scholarly journals Plastic mechanisms of thin-walled cold-formed steel members in eccentric compression

2018 ◽  
Vol 128 ◽  
pp. 184-192 ◽  
Author(s):  
Viorel Ungureanu ◽  
Maria Kotełko ◽  
Anna Karmazyn ◽  
Dan Dubina
Keyword(s):  
Eccentric Compression ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Thin Walled

Overall Stability of Cold-Formed Steel Lipped Channel Axially Compressed Members with Batten Plates

2011 ◽  
Vol 94-96 ◽  
pp. 953-957
Author(s):  
De Fa Sun
Keyword(s):  
Bearing Capacity ◽  
Steel Structure ◽  
Calculation Methods ◽  
Steel Members ◽  
Overall Stability ◽  
Cold Formed Steel ◽  
Thin Walled ◽  
Flexural Torsional Buckling ◽  
Warpage Deformation ◽  
Specific Number

Batten plates can play a significant role in reducing the bearing capacity of the entire component and preventing the upward warpage deformation in the opening section. The specific number of batten plates should be calculated for the open cold-formed thin-walled steel structure. By theoretical analysis, this study develops the flexural-torsional buckling formula for the open lipped-channel section cold-formed thin-walled axially compressed members with batten plates. The calculating results show that, according to the configuration rule with 80 iy space between batten plates along the opening direction in the open thin-walled steel members, the warpage deformation will be effectively prevented in the opening direction. Besides, the bearing capacity of the entire member will be increased. The proposed calculation methods can actively complement the existing code.

Recent research on stability analysis of thin-walled cold-formed steel members

1998 ◽  
Vol 46 (1-3) ◽  
pp. 172-173 ◽  
Author(s):  
D Dubina ◽  
D Goina ◽  
M Georgescu ◽  
V Ungureanu ◽  
R Zaharia
Keyword(s):  
Stability Analysis ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Thin Walled

Compressed Thin-Walled Cold-Formed Steel Members with Closed Cross-Sections

2014 ◽  
Vol 969 ◽  
pp. 93-96 ◽  
Author(s):  
Mohamad Al Ali
Keyword(s):  
Experimental Investigation ◽  
Theoretical Analysis ◽  
Cross Sections ◽  
Theoretical Research ◽  
Loading Process ◽  
Steel Members ◽  
Fundamental Information ◽  
Cold Formed Steel ◽  
Thin Walled ◽  
Theoretical Results

The paper presents fundamental information about experimental-theoretical research oriented to determinate the resistance of thin-walled compressed steel members. The investigated members had closed cross-sections made from homogeneous materials. The theoretical analysis in this research is oriented to determinate the resistance of mentioned members according to relevant standards, while the experimental investigation is to verify the theoretical results and to investigate the behavior of mentioned members during the loading process.

scholarly journals Plastic Mechanisms for Thin-Walled Cold-Formed Steel Members in Eccentric Compression

2016 ◽  
Vol 10 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Viorel Ungureanu ◽  
Maria Kotełko ◽  
Jan Grudziecki
Keyword(s):  
Load Capacity ◽  
Local Buckling ◽  
Minor Axis ◽  
Local Plastic ◽  
Eccentric Compression ◽  
Steel Members ◽  
Plastic Mechanism ◽  
Eurocode 3 ◽  
Cold Formed Steel ◽  
Thin Walled

Abstract The Eurocode 3 concerning thin-walled steel members divides members subjected to compression into four classes, considering their ductility. The representatives of the class C4 are short bars, for which the load-capacity corresponds to the maximum compression stresses less than the yield stress. There are bars prone to local buckling in the elastic range and they do not have a real post-elastic capacity. The failure at ultimate stage of such members, either in compression or bending, always occurs by forming a local plastic mechanism. This fact suggests the possibility to use the local plastic mechanism to characterise the ultimate strength of such members. The present paper is based on previous studies and some latest investigations of the authors, as well as the literature collected data. It represents an attempt to study the plastic mechanisms for members in eccentric compression about minor axis and the evolution of plastic mechanisms, considering several types of lipped channel sections.

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