Soğukta şekil verilmiş çelik omega kesitli kolonların eksenel yük etkisi altındaki davranışlarının deneysel olarak incelenmesi

Öz

Bu çalışma, soğukta şekil verilmiş çelik (CFS) omega kesitli kolonların eksenel yük altındaki burkulma davranışlarını ve taşıma kapasitelerini deneysel olarak incelemeyi amaçlamaktadır. Araştırma kapsamında, 1.75 mm ile 3 mm arasında değişen et kalınlıklarına sahip 11 adet omega kolon numunesi, farklı kalınlıktaki dalgalı silo duvarı levhalarıyla birleştirilerek eksenel basınç testlerine tabi tutulmuştur. Deneyler, yanal destek koşullarının ve kolon et kalınlığının yük taşıma kapasitesi, elastik ötesi davranış ve göçme modları üzerindeki etkilerini analiz etmek üzere kurgulanmıştır. Elde edilen bulgular, omega kesitlerin silo duvarı gibi ikincil elemanlarla etkileşimli çalışma performansını ortaya koyarak literatürdeki önemli bir boşluğu doldurmaktadır. Çalışma, ince cidarlı bu elemanların modern inşaat uygulamalarındaki tasarımı için kritik veriler sunmaktadır.

Anahtar Kelimeler

• Soğukta şekil verilmiş çelik
• Kolon
• Deneysel çalışma
• Omega kesit
• Oluklu duvar

Experimental investigation of the behavior of cold-formed steel omega-section columns under axial load

Öz

This study aims to experimentally investigate the buckling behavior and load-bearing capacities of cold-formed steel (CFS) omega-section columns under axial load. Within the scope of the research, 11 omega column specimens with thicknesses ranging from 1.75 mm to 3 mm were integrated with corrugated silo wall sheets of various thicknesses and subjected to axial compression tests. The experiments were designed to analyze the effects of lateral restraint conditions and column thickness on load-bearing capacity, post-elastic behavior, and failure modes. The findings fill a significant gap in literature by demonstrating the interactive performance of omega sections with secondary elements like silo walls. This study provides critical data for the design of these thin-walled members in modern construction applications.

Anahtar Kelimeler

• Cold-formed steel
• Column
• Experimental study
• Omega section
• Corrugated wall

Teşekkür

The authors would like to acknowledge the OBIAL Steel Silo for helping in the specimen fabrication and testing.

Kaynakça

1. AISI S100, North American specification for the design of cold-formed steel structural members, American Iron and Steel Institute, Washington D.C., United States, 2016.
2.     Eurocode. Eurocode 3, Design of steel structures - Part 1-3: General rules - Supplementary rules for cold-formed members and sheeting, European Committee for Standardization, 2007.
3.     M. Sondej, P. Iwicki, J. Tejchman, M. Wójcik, “Critical assessment of Eurocode approach to stability of metal cylindrical silos with corrugated walls and vertical stiffeners.,” Thin-Walled Structures, 95, 335-346, 2015. https://doi.org/10.1016/j.tws.2015.07.015
4.     M. Wójcik, P. Iwicki, J. Tejchman, “3D buckling analysis of a cylindrical metal bin composed of corrugated sheets strengthened by vertical stiffeners.,” Thin-Walled Structures, 49 (8), 947-963, 2011. https://doi.org/10.1016/j.tws.2011.03.010
5.     K. Rejowski, P. Iwicki, J. Tejchman, M. Wójcik, “Buckling resistance of a metal column in a corrugated sheet silo-experiments and non-linear stability calculations.,” Thin-Walled Structures, 182, 110206, 2023.https://doi.org/10.1016/j.tws.2022.110206
6.     S. Z. Khan, J. Pasha, M. R. Islam, T. Jannat, M. S. Alam, T. H. Tusher, K. S. Ahmed, “Buckling behaviour of cold formed steel omega(ω)-section under compression,” ICACE 2024, Chattogram, Bangladesh, 2024.
7.     B. Young, K. J. R. Rasmussen, “Behaviour of cold-formed singly symmetric columns.,” Thin-Walled Structures, 33 (2), 83-102, 1999. https://doi.org/10.1016/S0263-8231(98)00044-5
8.     C. Wang, Z. Zhang, D. Zhao, Q. Liu, “Compression tests and numerical analysis of web-stiffened channels with complex edge stiffeners.,” Journal of Constructional Steel Research, 116, 29-39, 2016. https://doi.org/10.1016/j.jcsr.2015.08.013

9.     Y. B. Kwon, B. S. Kim, G. J. Hancock, “Compression tests of high strength cold-formed steel channels with buckling interaction.,” Journal of Constructional Steel Research, 65 (2), 278-289, 2009. https://doi.org/10.1016/j.jcsr.2008.07.005
10.   B. Young, “Design of channel columns with inclined edge stiffeners.,” Journal of Constructional Steel Research, 60 (2), 183-197, 2004. https://doi.org/10.1016/j.jcsr.2003.09.001
11.   K. Mitsui, K. Ikarashi, T. Kobashi, R. Kuwada, “Elastic critical local buckling stress in cold-formed lipped channel and hat sections under uniform compression.,” Thin-Walled Structures, 191, 111064, 2023.https://doi.org/10.1016/j.tws.2023.111064
12.   E. S. dos Santos, E. M. Batista, D. Camotim, “Experimental investigation concerning lipped channel columns undergoing local–distortional–global buckling mode interaction.,” Thin-Walled Structures, 54, 19-34, 2012. https://doi.org/10.1016/j.tws.2012.02.004
13.   P. B. Dinis, E. M. Batista, D. Camotim, E. S. dos Santos, “Local–distortional–overall interaction in lipped channel columns: experimental results, numerical simulations and design considerations.,“ Thin-Walled Structures, 61, 2-13, 2012.https://doi.org/10.1016/j.tws.2012.04.012
14.   D. Wang, Y. Chen, R. Ren, C. Zhou, M. Yang, “Experimental investigation into the axial compressive behavior of Q460 cold-formed lipped channel.,” Structures, 74, 108657, 2025.https://doi.org/10.1016/j.istruc.2025.108657
15.   J. Ye, I. Hajirasouliha, J. Becque, “Experimental investigation of local-flexural interactive buckling of cold-formed steel channel columns.,” Thin-Walled Structures, 125, 245-258, 2018.https://doi.org/ 10.1016/j.tws.2018.01.020
16.   D. Cava, D. Camotim, P. B. Dinis, A. Madeo, “Numerical investigation and direct strength design of cold-formed steel lipped channel columns experiencing local–distortional–overall interaction.,” Thin-Walled Structures, 105, 231-247, 2016.https://doi.org/10.1016/j.tws.2016.03.025
17.   S. Kherbouche, A. Megnounif, “Numerical study and design of thin walled cold formed steel built-up open and closed section columns.,” Engineering Structures, 179, 670-682, 2019. https://doi.org/10.1016/ j.engstruct.2018.10.069
18.   A. D. Martins, P. B. Dinis, D. Camotim, “On the influence of local-distortional interaction in the behaviour and design of cold-formed steel web-stiffened lipped channel columns.,” Thin-Walled Structures, 101, 181-204, 2016. https://doi.org/10.1016/j.tws.2015.11.021
19.   J. Leng, J. K. Guest, B. W. Schafer, “Shape optimization of cold-formed steel columns.,” Thin-Walled Structures, 49 (12), 1492-1503, 2011. https://doi.org/10.1016/j.tws.2011.07.009