Nonlinear Study on the Mechanical Performance of Built-Up Cold-Formed Steel Concrete-Filled Columns under Compression  

作　　者：Oulfa Harrat Yazid Hadidane S.M.Anas Nadhim Hamah Sor Ahmed Farouk Deifalla Paul O.Awoyera Nadia Gouider 

机构地区：[1]Civil Engineering Laboratory,Faculty of Technology,Department of Civil Engineering,Badji Mokhtar-Annaba University,P.O.Box 12,Annaba,23000,Algeria [2]Department of Civil Engineering,Faculty of Engineering and Technology,Jamia Millia Islamia(A Central University),New Delhi,110025,India [3]Civil Engineering Department,University of Garmian,Kalar,46021,Iraq [4]Department of Civil Engineering,Harran University,Sanliurfa,63510,Turkey [5]Structural Engineering and Construction Management Department,Future University in Egypt,New Cairo,11835,Egypt [6]Department of Civil Engineering,Covenant University,Ota,112233,Nigeria

出　　处：《Computer Modeling in Engineering & Sciences》2024年第6期3435-3465,共31页工程与科学中的计算机建模（英文）

摘　　要：Given their numerous functional and architectural benefits,such as improved bearing capacity and increased resistance to elastic instability modes,cold-formed steel(CFS)built-up sections have become increasingly developed and used in recent years,particularly in the construction industry.This paper presents an analytical and numerical study of assembled CFS two single channel-shaped columns with different slenderness and configurations(backto-back,face-to-face,and box).These columns were joined by double-row rivets for the back-to-back and box configurations,whereas they were welded together for the face-to-face design.The built-up columns were filled with ordinary concrete of good strength.Finite element models were applied,using ABAQUS software,to assess mechanical performance and study the influence of assembly techniques on the behavior of cold-formed columns under axial compression.Analytical approaches based on Eurocode 3 and Eurocode 4 recommendations for un-filled and concrete-filled columns respectively were followed for the numerical analysis,and concrete confinement effects were also considered per American Concrete Institute(ACI)standards for face-to-face and box configurations.The obtained results indicated a good correlation between the numerical results and the proposed analytical methodology which did not exceed 8%.The failure modes showed that the columns failed due to instabilities such as local and global buckling.

关 键 词：Cold-formed steel built-up sections SLENDERNESS rivets WELDED axial compression analytical approaches CONFINEMENT BUCKLING 

分 类 号：TU528[建筑科学—建筑技术科学] TP3[自动化与计算机技术—计算机科学与技术]