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Stress concentration factors of brace in-plane loaded bird-beak SHS gap K-joints
Abstract Experimental and numerical investigations have been performed to study the stress concentration factors (SCFs) of brace in-plane loaded bird-beak gap K-joints. Four bird-beak SHS gap K-joint specimens were tested. Hot spot strain distributions along the weld toes at crown and saddle area were determined, from which the strain concentration factors (SNCFs) can be extrapolated. Parametric study was then implemented through numerical analyses to explore the influences of the three key non-dimensional parameters (i.e. β, 2γ, τ) on the SCFs, and the SCF design formulae were established correspondingly. Besides, the comparisons between the SCFs of bird-beak gap K-joints and conventional ones were also carried out. The results revealed that the brace crown area possessed the greatest SNCFs within entire bird-beak joint. The diamond bird-beak gap K-joints generally possess less stress concentrations than the square bird-beak counterparts with the same member geometries. Moreover, it is shown that the SCFs of conventional gap K-joints are much greater than those of the bird-beak counterparts investigated in this study.
Graphical abstract The strain concentrations of bird-beak SHS gap K-joints under brace in-plane forces were experimentally studied. The SCFs of bird-beak SHS gap K-joints under brace in-plane forces were further obtained using finite element method. The effects of three non-dimensional parameters on SCF were revealed. The SCF formulae for bird-beak gap K-joints under brace in-plane forces were proposed. Display Omitted
Highlights The SNCFs of bird-beak SHS gap K-joints under brace in-plane forces were experimentally obtained. The SCFs of bird-beak SHS gap K-joints under brace in-plane forces were calculated by finite element method. The influences of the three non-dimensional parameters (β, 2γ, τ) on SCFs were parametrically studied. The SCF formulae for bird-beak gap K-joints under brace in-plane forces were proposed.
Stress concentration factors of brace in-plane loaded bird-beak SHS gap K-joints
Abstract Experimental and numerical investigations have been performed to study the stress concentration factors (SCFs) of brace in-plane loaded bird-beak gap K-joints. Four bird-beak SHS gap K-joint specimens were tested. Hot spot strain distributions along the weld toes at crown and saddle area were determined, from which the strain concentration factors (SNCFs) can be extrapolated. Parametric study was then implemented through numerical analyses to explore the influences of the three key non-dimensional parameters (i.e. β, 2γ, τ) on the SCFs, and the SCF design formulae were established correspondingly. Besides, the comparisons between the SCFs of bird-beak gap K-joints and conventional ones were also carried out. The results revealed that the brace crown area possessed the greatest SNCFs within entire bird-beak joint. The diamond bird-beak gap K-joints generally possess less stress concentrations than the square bird-beak counterparts with the same member geometries. Moreover, it is shown that the SCFs of conventional gap K-joints are much greater than those of the bird-beak counterparts investigated in this study.
Graphical abstract The strain concentrations of bird-beak SHS gap K-joints under brace in-plane forces were experimentally studied. The SCFs of bird-beak SHS gap K-joints under brace in-plane forces were further obtained using finite element method. The effects of three non-dimensional parameters on SCF were revealed. The SCF formulae for bird-beak gap K-joints under brace in-plane forces were proposed. Display Omitted
Highlights The SNCFs of bird-beak SHS gap K-joints under brace in-plane forces were experimentally obtained. The SCFs of bird-beak SHS gap K-joints under brace in-plane forces were calculated by finite element method. The influences of the three non-dimensional parameters (β, 2γ, τ) on SCFs were parametrically studied. The SCF formulae for bird-beak gap K-joints under brace in-plane forces were proposed.
Stress concentration factors of brace in-plane loaded bird-beak SHS gap K-joints
Duan, Yinghao (author) / Cheng, Bin (author) / Huang, Fenghua (author) / Chen, Man-Tai (author)
2021-02-14
Article (Journal)
Electronic Resource
English
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