Investigating shear behaviour of fibreglass rock bolts reinforcing infilled discontinuities for various pretension loads
Article
| Article Title | Investigating shear behaviour of fibreglass rock bolts reinforcing infilled discontinuities for various pretension loads |
|---|---|
| ERA Journal ID | 4162 |
| Article Category | Article |
| Authors | Gregor, Peter, Mirzaghorbanali, Ali, McDougall, Kevin, Aziz, Naj and Jodeiri Shokri, Behshad |
| Journal Title | Canadian Geotechnical Journal |
| Journal Citation | 61 (3) |
| Number of Pages | 33 |
| Year | 2024 |
| Publisher | Canadian Science Publishing |
| Place of Publication | Canada |
| ISSN | 0008-3674 |
| 1208-6010 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1139/cgj-2022-0619 |
| Web Address (URL) | https://cdnsciencepub.com/doi/abs/10.1139/cgj-2022-0619 |
| Abstract | In this paper, eight shear tests were carried out utilising a double shear with infilled shear interfaces after determining an appropriate experimental design and modified testing scheme. For this, two rock bolts, 20-tonne and 30-tonne, were tested with modified double shear testing apparatus at different pretension loads. The infilled test scheme was conducted with 5mm thick sandy clay infilled shear interfaces. A 40MPa small aggregate concrete was used for all samples to simulate the host rock. Based on the shear profiles, it was found that all samples followed a three-part failure profile consisting of elastic, strain softening and failure regions. The results of double shear tests revealed that the 20-tonne rock bolt saw a significant overall decrease of approximately 30% in its failure displacement response as opposed to the 30-tonne samples’ which saw a 6% increase. Also, it was concluded that the 30-tonne samples outperformed the 20-tonne rock bolts by up to 30%, irrespective of initial pretension settings. Comparing the physical failure characteristics of the samples found that both the 20-tonne and 30-tonne samples exhibited the same response to increased pretension. As the pretension increased, the angle experienced at the hinge point also increased incrementally. |
| Keywords | Fibre glass rock bolts, joints, clean and infilled joints |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
| 401902. Geomechanics and resources geotechnical engineering | |
| Public Notes | The accessible file is the accepted version of the paper. Please refer to the URL for the published version. |
| Byline Affiliations | University of Southern Queensland |
| School of Engineering | |
| School of Surveying and Built Environment | |
| University of Wollongong |
https://research.usq.edu.au/item/yz0qx/investigating-shear-behaviour-of-fibreglass-rock-bolts-reinforcing-infilled-discontinuities-for-various-pretension-loads
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