Abstract
Numerical modelling of fully grouted rock bolts loaded in tension is presented by implementing a non-linear bond–slip relationship of bolt–grout interface into a commercial finite difference rock mechanics code. The proposed model shows a close match with the experimental results and analytical predictions in terms of load–displacement relationship, rock bolt axial force distribution and interfacial shear stress distribution. A detailed debonding failure process is also presented, which includes five successive states: elastic state, elastic-softening state, elastic-softening-debonding state, softening-debonding state and debonding state.
Original language | English |
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Pages (from-to) | 293-300 |
Number of pages | 8 |
Journal | International Journal of Rock Mechanics and Mining Sciences |
Volume | 71 |
Early online date | 28 Aug 2014 |
DOIs | |
Publication status | Published - 1 Oct 2014 |
Keywords
- FLAC model
- Rockbolt elements
- Fully grouted rock bolts
- Non-linear bond–slip relationship
- Debonding failure process