Research analyzes shear performance of self-tapping screws in cold-formed steel, indicating implications for structural integrity.
As an important connector in cold-formed steel structures， the shear performance and failure modes of self-tapping screws directly affect the mechanical properties and failure modes of the structure. At present， researchers worldwide have focused mainly on the shear capacity of single self-tapping screws， while the studies related to the shear-slip constitutive relationship are scarce. Therefore， this paper summarized and analyzed both previous shear test results of single self-tapping screws and the tests conducted in this study. Using the XTDIC three-dimensional full-field strain measurement and analysis system， an in-depth analysis of the shear failure mechanism of self-tapping screw connections in cold-formed steel was conducted. Considering the effects of screw diameter， plate thickness， and material properties， two shear-slip constitutive models corresponding to the two major shear failure modes of such connections were proposed， which showed good agreement with the experimental results.
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LI et al. (2026) studied this question.
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