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 Theoretical and Experimental Stress-Strain Analysis of Compressed Steel Members with Closed Cross-Sections

2013 ◽  
Vol 8 (1) ◽  
pp. 59-66
Author(s):  
Michal Tomko ◽  
Mohamad Al Ali ◽  
Ivo Demjan
Keyword(s):  
Cross Sections ◽  
Carrying Capacity ◽  
Strain Analysis ◽  
Load Carrying Capacity ◽  
Steel Members ◽  
Fundamental Information ◽  
Load Carrying ◽  
Numerical Research ◽  
Thin Walled ◽  
Theoretical Results

Abstract The paper presents fundamental information about experimental and theoretic-numerical research to determinate the load-carrying capacity of thin-walled cold-formed compressed steel members. The investigated members have closed cross-sections made from homogeneous materials. The theoretic-numerical analysis in this paper is oriented on the modeling of the initial deviations effects, caused by production process, on the load-carrying capacities of mentioned members, while the experimental investigation is to verify the theoretical results and to investigate the behavior of mentioned members during the loading process.

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.

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
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