Prediction model of Power-Actuated Fasteners subjected to pull-out from Cold-formed steel plates
Truong, An Nhien
Pham, Cao Hung
Hancock, Gregory J.
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An experimental program comprising of sixty-nine cross-tension test specimens was carried out to investigate the pull-out behaviour of Power-Actuated Fastener (PAF) connections joining two cold-formed steel (CFS) plates under quasi-static monotonic tensile loading. The studied parameters were the diameter of the fasteners and the thicknesses of the top and base steel plates. The fasteners had diameters of 3.7 mm, 4.5 mm, and 4.0 mm, from two manufacturers Hilti Pty Ltd. and RamsetTM. The top sheets had thicknesses ranging from 1.5 to 4.0 mm and the base plates had thicknesses ranging from 3.0 to 20.0 mm. The test results reveal that PAF connections exhibit a high pull-out capacity providing sufficient embedment length is provided. A model is proposed to evaluate the pull-out strength of the PAF connections based on the base material strength, the diameter and embedment length of the fastener. The equation proposed in the model produces a test-to-prediction mean ratio of 1.04 with a coefficient of variation of 0.12.