Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock
In rock engineering of the cold region, there are a lot of rock joints. The shear characteristics of joints play a decisive role in the stability of rock engineering in the cold area. In this paper, based on the numerical simulation method of particle flow, reasonable microscopic parameters are sele...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8869300 |
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| author | Yanhui Cheng Dongliang He Jianyu Yang |
| author_facet | Yanhui Cheng Dongliang He Jianyu Yang |
| author_sort | Yanhui Cheng |
| collection | DOAJ |
| description | In rock engineering of the cold region, there are a lot of rock joints. The shear characteristics of joints play a decisive role in the stability of rock engineering in the cold area. In this paper, based on the numerical simulation method of particle flow, reasonable microscopic parameters are selected for the numerical simulation of the direct shear test of bolted joints. The results show that the shear stiffness and contact modulus are linearly and positively correlated. The greater the contact modulus, the greater the residual stress, the better the synergetic effect between rock and bolt, and the more developed the microcrack. The smaller the contact stiffness ratio, the greater the residual stress. The shear stiffness decreases with the increase in the contact stiffness ratio, and the larger the contact stiffness ratio, the slower the shear stiffness decreases, while the shear strength does not change with the contact stiffness ratio. The contact stiffness ratio has a weak effect on the number of cracks in the model. The shear stiffness increases with the increase in the parallel bond modulus, and the shear strength decreases with the increase in the parallel bond modulus. The binding stiffness is independent of the shear stiffness, and the peak shear stress decreases with the increase in the binding stiffness ratio. The greater the bond stiffness ratio, the greater the number of cracks. |
| format | Article |
| id | doaj-art-cee7f31cda184c6e8aae0d5e28ba107a |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-cee7f31cda184c6e8aae0d5e28ba107a2025-08-20T03:23:43ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88693008869300Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of RockYanhui Cheng0Dongliang He1Jianyu Yang2School of Civil Engineering, Hunan University of City, Yiyang, Hunan 413000, ChinaSchool of Civil Engineering, Hunan University of City, Yiyang, Hunan 413000, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaIn rock engineering of the cold region, there are a lot of rock joints. The shear characteristics of joints play a decisive role in the stability of rock engineering in the cold area. In this paper, based on the numerical simulation method of particle flow, reasonable microscopic parameters are selected for the numerical simulation of the direct shear test of bolted joints. The results show that the shear stiffness and contact modulus are linearly and positively correlated. The greater the contact modulus, the greater the residual stress, the better the synergetic effect between rock and bolt, and the more developed the microcrack. The smaller the contact stiffness ratio, the greater the residual stress. The shear stiffness decreases with the increase in the contact stiffness ratio, and the larger the contact stiffness ratio, the slower the shear stiffness decreases, while the shear strength does not change with the contact stiffness ratio. The contact stiffness ratio has a weak effect on the number of cracks in the model. The shear stiffness increases with the increase in the parallel bond modulus, and the shear strength decreases with the increase in the parallel bond modulus. The binding stiffness is independent of the shear stiffness, and the peak shear stress decreases with the increase in the binding stiffness ratio. The greater the bond stiffness ratio, the greater the number of cracks.http://dx.doi.org/10.1155/2020/8869300 |
| spellingShingle | Yanhui Cheng Dongliang He Jianyu Yang Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock Advances in Civil Engineering |
| title | Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock |
| title_full | Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock |
| title_fullStr | Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock |
| title_full_unstemmed | Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock |
| title_short | Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock |
| title_sort | shear failure of bolted joints considering mesoscopic deformation characteristics of rock |
| url | http://dx.doi.org/10.1155/2020/8869300 |
| work_keys_str_mv | AT yanhuicheng shearfailureofboltedjointsconsideringmesoscopicdeformationcharacteristicsofrock AT donglianghe shearfailureofboltedjointsconsideringmesoscopicdeformationcharacteristicsofrock AT jianyuyang shearfailureofboltedjointsconsideringmesoscopicdeformationcharacteristicsofrock |