Axial compression behaviours of tubular sectioned C-shape continuous-supported steel walls in MSB. (January 2022)

• Record Type: Journal Article
• Authors: Khan, Kashan; Chen, Zhihua; Liu, Jiadi; Khan, Arsalan; Javed, Khadija
• Is Part Of: Journal of constructional steel research. Volume 188(2022)
• Publication Date: 2022-01
• Subjects: Axial compression behaviours -- C-shape walls tests -- Failure mechanism -- Finite element analysis -- Codes' prediction equations; 3D Three-dimensional -- VMB Volumetric modular building -- MSB Modular steel building -- SHS Structural hollow sections -- ts Stiffener thickness -- # Number of columns -- t Column thickness -- S Columns spacing -- As Columns cross-sectional area -- D/t Width-to-thickness ratio -- D/B Width-to-length ratio -- Pu, Test and Pu, FE denote walls experimental and numerical ultimate compressive resistance -- fy and fu show yield and ultimate strength of steel -- Cov Coefficient of variation -- FE/FEA Finite element/Finite element analysis -- Pu, wall Ultimate compressive resistance of the wall -- Pu, C1, Pu, C2 and Pu, C3 denote ultimate resistances of C1, C2 and C3 -- Pu, C, EC3 and Pu, b, EC3 show ultimate compressive and bending resistance by EC3:1-1 -- Pu, C, AISC and Pu, C, GB show ultimate compressive resistance by AISC360 and GB50017; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2021.107009
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: The ultimate strength behaviour of C-shaped continuous-supported walls employing hot-rolled structural hollow section (SHS) columns in modular steel buildings (MSB) was evaluated using two full-scale axial compression tests. The columns' width-to-length (D/B), width-to-thickness (D/t), and material strength were considered experimental parameters. A three-dimensional (3D) finite element (FE) model was validated against test results, accounting for geometry and material nonlinearities while projecting ultimate strength and failure behaviour. The size, spacing, number of columns, stiffener thickness and sidewall effects were evaluated in a parametric analysis. The columns compressive resistance was predicted using prediction equations from EC3:1-1, AISC360, and GB50017. The results revealed that the column nominal strength was reduced to achieve compression yielding due to columns stiffness differences, mutual constraints, and elastic buckling. If the buckling length is considered or omitted, the EC3:1-1 slenderness limit for Class 3 steel members becomes less conservative. Reducing column size and spacing or increasing stiffener size and number improves column and wall compressive behaviour; however, the sidewalls improved the corner columns constraint while weakening the front wall. GB50017 predictions were the safest; whereas, EC3:1-1 made the most unsafe predictions when buckling was not taken into account. Graphical abstract: Unlabelled Image Highlights: The ultimate strength investigation of C-shaped multi-column walls comprised SHS columns using full-scale compression tests. An experimentally verified FEM to investigate parametric effects on C-shape multi-column walls. Tubular columns' yield and ultimate resistances prediction using three national codes prediction equations. Summarising the design guidelines, and geometrical limitations for conservative design of C-shape walls.