In view of the bearing characteristics of the anchorage interface in the process of anchor drawing, a three-stage nonlinear function model is established to describe the three stages of elastic, plastic softening and cracking sliding of the anchorage interface based on the mechanical failure mechanism of anchor. Adopting the load transfer theory, the bearing characteristics of anchor under the pull-out load are analyzed, and the rationality of the model is verified by comparing with the field test. The results show that: (1) The lateral resistance in the elastic zone is hyperbolic along the depth direction; The lateral resistance in the plastic soft zone is nonlinear softened to the residual shear strength; the lateral resistance in the sliding zone is evenly distributed. (2) In the process of drawing, with the increase of drawing load, the P-s curve changes from a straight line to a curve. Under the same load increment, the displacement increment becomes larger. The theoretical prediction is in good agreement with the measured results.
Ouyang Pengbo
,
Xiao Hongbo
,
Shen Zhenxin
. Analysis on the Bearing Characteristics of Anchor Bolt Anchoring Interface[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S2)
: 575
-581
.
DOI: 10.20174/j.JUSE.2024.S2.08
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