Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion
The stability analysis of passive bolt-reinforced rock slopes under seismic loads is investigated within the framework of the kinematic approach of limit analysis theory. A pseudo-static method is adopted to account for the inertial forces induced in the rock mass by seismic events. The strength pro...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-08-01
|
| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775516301949 |
| _version_ | 1818946130004672512 |
|---|---|
| author | Mounir Belghali Zied Saada Denis Garnier Samir Maghous |
| author_facet | Mounir Belghali Zied Saada Denis Garnier Samir Maghous |
| author_sort | Mounir Belghali |
| collection | DOAJ |
| description | The stability analysis of passive bolt-reinforced rock slopes under seismic loads is investigated within the framework of the kinematic approach of limit analysis theory. A pseudo-static method is adopted to account for the inertial forces induced in the rock mass by seismic events. The strength properties of the rock material are described by a modified Hoek–Brown strength criterion, whereas the passive bolts are modeled as bar-like inclusions that exhibit only resistance to tensile-compressive forces. Taking advantage of the ability to compute closed-form expressions for the support functions associated with the modified Hoek–Brown strength criterion, a rotational failure mechanism is implemented to derive rigorous lower bound estimates for the amount of reinforcement strength to prevent slope failure. The approach is then applied to investigating the effects of relevant geometry, strength and loading parameters in light of a preliminary parametric study. The accuracy of the approach is assessed by comparison of the lower bound estimates with finite element limit analysis solutions, thus emphasizing the ability of the approach to properly predict the stability conditions and to capture the essential features of deformation localization pattern. Finally, the extension of the approach to account for slipping at the interface between reinforcements and surrounding rock mass is outlined. |
| first_indexed | 2024-12-20T08:10:07Z |
| format | Article |
| id | doaj.art-92791597b3b6422398efd36a2be4ac6e |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-12-20T08:10:07Z |
| publishDate | 2017-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-92791597b3b6422398efd36a2be4ac6e2022-12-21T19:47:18ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552017-08-019465967010.1016/j.jrmge.2016.12.007Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterionMounir Belghali0Zied Saada1Denis Garnier2Samir Maghous3Laboratoire de Génie Civil, ENIT, Université de Tunis El Manar, Tunis, TunisiaLaboratoire de Génie Civil, ENIT, Université de Tunis El Manar, Tunis, TunisiaUniversité Paris-Est, Laboratoire Navier (UMR8205), ENPC-IFSTTAR-CNRS, Marne-la-Vallée, FranceDepartment of Civil Engineering, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha 99, Porto Alegre, RS, 90350-190, BrazilThe stability analysis of passive bolt-reinforced rock slopes under seismic loads is investigated within the framework of the kinematic approach of limit analysis theory. A pseudo-static method is adopted to account for the inertial forces induced in the rock mass by seismic events. The strength properties of the rock material are described by a modified Hoek–Brown strength criterion, whereas the passive bolts are modeled as bar-like inclusions that exhibit only resistance to tensile-compressive forces. Taking advantage of the ability to compute closed-form expressions for the support functions associated with the modified Hoek–Brown strength criterion, a rotational failure mechanism is implemented to derive rigorous lower bound estimates for the amount of reinforcement strength to prevent slope failure. The approach is then applied to investigating the effects of relevant geometry, strength and loading parameters in light of a preliminary parametric study. The accuracy of the approach is assessed by comparison of the lower bound estimates with finite element limit analysis solutions, thus emphasizing the ability of the approach to properly predict the stability conditions and to capture the essential features of deformation localization pattern. Finally, the extension of the approach to account for slipping at the interface between reinforcements and surrounding rock mass is outlined.http://www.sciencedirect.com/science/article/pii/S1674775516301949Reinforced rock slopeModified Hoek–Brown criterionSeismic loadingLimit analysisRotational failure mechanism |
| spellingShingle | Mounir Belghali Zied Saada Denis Garnier Samir Maghous Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion Journal of Rock Mechanics and Geotechnical Engineering Reinforced rock slope Modified Hoek–Brown criterion Seismic loading Limit analysis Rotational failure mechanism |
| title | Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion |
| title_full | Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion |
| title_fullStr | Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion |
| title_full_unstemmed | Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion |
| title_short | Pseudo-static stability analysis of rock slopes reinforced by passive bolts using the generalized Hoek–Brown criterion |
| title_sort | pseudo static stability analysis of rock slopes reinforced by passive bolts using the generalized hoek brown criterion |
| topic | Reinforced rock slope Modified Hoek–Brown criterion Seismic loading Limit analysis Rotational failure mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S1674775516301949 |
| work_keys_str_mv | AT mounirbelghali pseudostaticstabilityanalysisofrockslopesreinforcedbypassiveboltsusingthegeneralizedhoekbrowncriterion AT ziedsaada pseudostaticstabilityanalysisofrockslopesreinforcedbypassiveboltsusingthegeneralizedhoekbrowncriterion AT denisgarnier pseudostaticstabilityanalysisofrockslopesreinforcedbypassiveboltsusingthegeneralizedhoekbrowncriterion AT samirmaghous pseudostaticstabilityanalysisofrockslopesreinforcedbypassiveboltsusingthegeneralizedhoekbrowncriterion |