Research on Tensile Load Capacity of Self-Cutting Undercut Mechanical Anchors

DOI: https://doi.org/10.62517/jcte.202606112

Author(s)

Tao Deng1, Shibin Zuo2,*, Qi Li2, Yanfeng Fan2, Xinrong Li2

Affiliation(s)

1CRRC Meishan Co., Ltd., Meishan, China 2Meishan CRRC Fastening System Co., Ltd., Meishan, China *Corresponding Author

Abstract

The self-cutting undercut mechanical anchor is a type of mechanical anchor within post-installed fastening systems, which achieves its anchoring effect based on the mechanical interlock formed between the expanded borehole at the base and the anchor’s expansion element. Compared to other mechanical anchors, the self-cutting undercut anchor have superior load-bearing capacity, minimal displacement, and exhibits reduced sensitivity to concrete cracking and borehole diameter variations. This paper introduces a specific self-cutting undercut mechanical anchor and presents experimental investigations on its tensile load capacity under varying concrete crack widths. The experimental results reveal that the ultimate tensile load capacity of this anchor remains nearly unchanged within concrete crack widths ranging from 0 to 1.5 mm, whereas the tensile stiffness (displacement) increases proportionally with the widening of cracks.

Keywords

Self-Cutting Undercut Mechanical Anchors; Tensile Load Capacity; Concrete Cracks; Tensile Stiffness; Displacement

References

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