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Erschienen in: Rock Mechanics and Rock Engineering 7/2020

13.04.2020 | Original Paper

Analysis of Deformation Characteristics of Fully Grouted Rock Bolts Under Pull-and-Shear Loading

verfasst von: Yu Chen, Guanping Wen, Jianhua Hu

Erschienen in: Rock Mechanics and Rock Engineering | Ausgabe 7/2020

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Abstract

A new analytical approach able to predict the mechanical behavior of fully grouted rock bolts subjected to pull-and-shear load is been proposed. The elastic theory of a semi-infinite length beam and approximate differential equation of the deflection curve (elastic and elastoplastic) are employed to analyze the lateral behavior of a bolt under surrounding rock pressures. Bolt axial behavior is based on a realistic tri-linear bond-slip model with residual bond strength at the grout–bolt interface. According to the Tresca yield criterion, important failure parameters such as shear displacement, tangent direction, tensile displacement, and tensile force can be determined via the analytical approach while the shear force and other basic parameters are provided. Results of the proposed analytical approach for 0°, 20°, 40°, 60°, and 90° displacing angles correlate well with experimental test results. Parametric analysis of both the rock and bolt mechanical behavior are also carried out using this new analytical approach.

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Metadaten
Titel
Analysis of Deformation Characteristics of Fully Grouted Rock Bolts Under Pull-and-Shear Loading
verfasst von
Yu Chen
Guanping Wen
Jianhua Hu
Publikationsdatum
13.04.2020
Verlag
Springer Vienna
Erschienen in
Rock Mechanics and Rock Engineering / Ausgabe 7/2020
Print ISSN: 0723-2632
Elektronische ISSN: 1434-453X
DOI
https://doi.org/10.1007/s00603-020-02108-0

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