The Analytical Approach to Evaluate the Load-Displacement Relationship of Rock Bolts
Joint Authors
Zhao, Hong-Bao
Chen, Jianhang
Yang, Shengli
Zhang, Junwen
He, Fulian
Yin, Shuaifeng
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-11-28
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
Fully grouted rock bolts are widely used in civil engineering and mining engineering, playing a significant role in keeping the stability and safety of excavations.
In this paper, the load transfer mechanism of fully grouted rock bolts was studied with an analytical model.
A trilinear model was used to depict the bond-slip behaviour of the bolt/grout interface.
The displacement of the confining medium was involved in this analytical model.
Then, the shear stress propagation along the bolt/grout interface was analysed in the elastic, elastic-softening, elastic-softening-debonding, softening-debonding, and debonding stages.
Experimental pull-out tests were used to validate this analytical model.
There was a good correlation between experimental and analytical results.
A parametric study was conducted to evaluate the influence of Young’s modulus of the confining medium, the shear strength of the bolt/grout interface, and the residual shear strength of the bolt/grout interface on the load transfer performance of rock bolts.
The results show that increasing Young’s modulus of the confining medium was beneficial for improving the load transfer performance of rock bolts.
However, once Young’s modulus of the confining medium was beyond a critical limit, it had marginal effect on the peak load of rock bolts.
Furthermore, increasing the shear strength of the bolt/grout interface and the residual shear strength of the bolt/grout interface led to rising of the peak load of rock bolts.
However, compared with the residual shear strength of the bolt/grout interface, increasing the shear strength of the bolt/grout interface had more apparent effect in improving the peak load of rock bolts.
American Psychological Association (APA)
Chen, Jianhang& Yang, Shengli& Zhao, Hong-Bao& Zhang, Junwen& He, Fulian& Yin, Shuaifeng. 2019. The Analytical Approach to Evaluate the Load-Displacement Relationship of Rock Bolts. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-15.
https://search.emarefa.net/detail/BIM-1115850
Modern Language Association (MLA)
Chen, Jianhang…[et al.]. The Analytical Approach to Evaluate the Load-Displacement Relationship of Rock Bolts. Advances in Civil Engineering No. 2019 (2019), pp.1-15.
https://search.emarefa.net/detail/BIM-1115850
American Medical Association (AMA)
Chen, Jianhang& Yang, Shengli& Zhao, Hong-Bao& Zhang, Junwen& He, Fulian& Yin, Shuaifeng. The Analytical Approach to Evaluate the Load-Displacement Relationship of Rock Bolts. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-15.
https://search.emarefa.net/detail/BIM-1115850
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1115850