Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint
The anchoring mechanism of a bolted joint subjected to a shear load was investigated using a bilinear constitutive model via the inner-embedded FISH language of particle flow code based on the discrete element method. The influences of the anchoring system on the macro-/micromechanical response were...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2017-01-01
|
Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2017/1627103 |
id |
doaj-c0f874bedc2448369eddb56d96733497 |
---|---|
record_format |
Article |
spelling |
doaj-c0f874bedc2448369eddb56d967334972020-11-24T22:57:00ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/16271031627103Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock JointGang Wang0Yongzheng Zhang1Yujing Jiang2Shugang Wang3Wenjun Jing4Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaResearch Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong 250061, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266555, ChinaThe anchoring mechanism of a bolted joint subjected to a shear load was investigated using a bilinear constitutive model via the inner-embedded FISH language of particle flow code based on the discrete element method. The influences of the anchoring system on the macro-/micromechanical response were studied by varying the inclination angle of the bolt. The results indicate a clear relationship between the mechanical response of a bolted rock joint and the mechanical properties of the anchoring angle. By optimizing the anchorage angle, the peak strength can be increased by nearly 50% relative to that at an anchorage angle of 90°. The optimal anchorage angle ranges from 45° to 75°. The damage mechanism at the optimal anchorage angle joint is revealed from a macroscopic mechanical perspective. The concentration of the contact force between disks will appear in the joint and around the bolt, resulting in crack initiation. These cracks are mainly tensile cracks, which are consistent with the formation mechanism for compression-induced tensile cracks. Therefore, the macroscopic peak shear stress in the joint and the microscopic damage to the anchoring system should be considered when determining the optimal anchoring angle to reinforce a jointed rock mass.http://dx.doi.org/10.1155/2017/1627103 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gang Wang Yongzheng Zhang Yujing Jiang Shugang Wang Wenjun Jing |
spellingShingle |
Gang Wang Yongzheng Zhang Yujing Jiang Shugang Wang Wenjun Jing Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint Advances in Materials Science and Engineering |
author_facet |
Gang Wang Yongzheng Zhang Yujing Jiang Shugang Wang Wenjun Jing |
author_sort |
Gang Wang |
title |
Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint |
title_short |
Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint |
title_full |
Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint |
title_fullStr |
Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint |
title_full_unstemmed |
Macro-Micro Failure Mechanisms and Damage Modeling of a Bolted Rock Joint |
title_sort |
macro-micro failure mechanisms and damage modeling of a bolted rock joint |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2017-01-01 |
description |
The anchoring mechanism of a bolted joint subjected to a shear load was investigated using a bilinear constitutive model via the inner-embedded FISH language of particle flow code based on the discrete element method. The influences of the anchoring system on the macro-/micromechanical response were studied by varying the inclination angle of the bolt. The results indicate a clear relationship between the mechanical response of a bolted rock joint and the mechanical properties of the anchoring angle. By optimizing the anchorage angle, the peak strength can be increased by nearly 50% relative to that at an anchorage angle of 90°. The optimal anchorage angle ranges from 45° to 75°. The damage mechanism at the optimal anchorage angle joint is revealed from a macroscopic mechanical perspective. The concentration of the contact force between disks will appear in the joint and around the bolt, resulting in crack initiation. These cracks are mainly tensile cracks, which are consistent with the formation mechanism for compression-induced tensile cracks. Therefore, the macroscopic peak shear stress in the joint and the microscopic damage to the anchoring system should be considered when determining the optimal anchoring angle to reinforce a jointed rock mass. |
url |
http://dx.doi.org/10.1155/2017/1627103 |
work_keys_str_mv |
AT gangwang macromicrofailuremechanismsanddamagemodelingofaboltedrockjoint AT yongzhengzhang macromicrofailuremechanismsanddamagemodelingofaboltedrockjoint AT yujingjiang macromicrofailuremechanismsanddamagemodelingofaboltedrockjoint AT shugangwang macromicrofailuremechanismsanddamagemodelingofaboltedrockjoint AT wenjunjing macromicrofailuremechanismsanddamagemodelingofaboltedrockjoint |
_version_ |
1725652462853947392 |