Steel and Composite Structures

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Behaviour of large fabricated stainless steel beam-to-tubular column joints with extended endplates

  • Wang, Jia (School of Civil Engineering, The University of Sydney) ;
  • Uy, Brian (School of Civil Engineering, The University of Sydney) ;
  • Li, Dongxu (School of Civil Engineering, The University of Sydney)
  • Received : 2019.04.05
  • Accepted : 2019.05.29
  • Published : 2019.07.10
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Abstract

This paper presents the flexural behaviour of stainless steel beam-to-tubular column joints with extended endplates subjected to static loading. Moment-rotation relationships were investigated numerically by using Abaqus software with geometric and material nonlinearity considered. The prediction of damages among components was achieved through ductile damage models, and the influence of initial geometric imperfections and residual stresses was evaluated in large fabricated stainless steel joints involving hollow columns and concrete-filled columns. Parametric analysis was subsequently conducted to assess critical factors that could affect the flexural performance significantly in terms of the initial stiffness and moment resistance. A comparison between codes of practice and numerical results was thereafter made, and design recommendations were proposed for further applications. Results suggest that the finite element model can predict the structural behaviour reasonably well with the component damage consistent with test outcomes. Initial geometric imperfections and residual stresses are shown to have little effect on the moment-rotation responses. A series of parameters that can influence the joint behaviour remarkably include the strain-hardening exponents, stainless steel strength, diameter of bolts, thickness of endplates, position of bolts, section of beams and columns. AS/NZS 2327 is more reliable to predict the joint performance regarding the initial stiffness and moment capacity compared to EN 1993-1-8.

Keywords

Acknowledgement

Supported by : Australian Research Council (ARC)

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