T-head Square-neck One-side Bolt （TSOB） is a novel fastener, which can be used for the connection of Square Hollow Steel （SHS） members, with its simple construction, easy installation, no additional aids, can adapt to the rough installation manners in construction site, and has a large application potential. In this paper, the Finite Element （FE） analysis software ABAQUS was used to establish the numerical model of TSOBs bolted beam to SHS column joints, evaluating the structural performance, and revealing the bearing and failure mechanism of such joints. Furthermore, the parametric analysis of TSOBs bolted beam to SHS column joints was carried out. The results show that the T-head aspect ratio of TSOB has a greater influence on the joint failure modes and bearing capacity. A suitable and optimal T-head aspect ratio can not only improve the punching bearing capacity of the bolt hole but also ensure that the mechanical properties of the joints are not affected by the slotted bolt holes. The influence of the rotation deviation and shank offset for TSOBs on the joint mechanical properties is minimal and can be ignored in the design. The arrangement pattern HVH for the slotted bolt holes results in optimum structural response of the joints and should be recommended in preference. Furthermore, medium assembly accuracy is recommended for the slotted bolt holes.
Key words
T-head square-neck one-side bolt /
steel tubular column /
beam-column joints /
bending performance /
numerical simulation
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References
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