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• W3178578238 startingPage "4053" @default.
• W3178578238 abstract "The continuous-supported modules using light steel multi-column wall systems have excessively been used in low-rise modular steel buildings (MSBs). In order to account for high-rise MSBs, the current research first developed continuous-supported load-bearing wall systems using hot-rolled structural hollow sections (SHS). Then a 3D nonlinear finite element model (NFEM) was generated and validated using five full-scale axial compression tests carried out in reference to simulate the actual structural behaviours of walls subjected to axial compression. The main parameters in the reported tests were varying cross-section sizes (D/B) and slendernesses (D/t), and material properties. The validated NFEM accounted for complex interactions among walls components and their material and geometrical nonlinearities. They accurately predicted ultimate strength and failure behaviour. Following that, parametric studies were conducted to understand the effects of various parameters on the compressive behaviours of walls and columns. These parameters included material strength, columns D/B and D/t ratios, columns spacings, column number and stiffener thickness. Through NFE analysis results, prediction equations in EC3, AISC360, and GB50017 were used to predict the ultimate compressive resistance of columns in these walls. Due to elastic buckling, the nominal capacity of SHS columns in multi-column walls declines, making the EC3 compressive resistance design non-conservative and necessitating the calculation of member capacity with global buckling. Reducing D/B or D/t and increasing stiffener size increases the strength and stiffness of columns and walls. Although the walls were ductile, elastic buckling and mutual restraints reduced the individual column bearing capacity, ductility, and stiffness. The external columns increase the constraint effect on corners due to more rigid constraints while weakening other columns, inducing system instability. The predictions on ultimate strengths of columns showed that GB50017 was safer than the other two codes, while EC3 predictions with or without accumulating buckling length were the least secure. Based on these numerical and analytical findings, the study tended to evaluate the axial compression behaviour of continuous-supported multi-column wall systems with SHS columns in high-rise MSBs." @default.
• W3178578238 created "2021-07-19" @default.
• W3178578238 creator A5039555197 @default.
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• W3178578238 date "2021-10-01" @default.
• W3178578238 modified "2023-10-17" @default.
• W3178578238 title "Numerical and parametric analysis on compressive behaviours of continuous-supported wall systems in MSB" @default.
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• W3178578238 doi "https://doi.org/10.1016/j.istruc.2021.07.001" @default.
• W3178578238 hasPublicationYear "2021" @default.
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