| Closure behavior of rock joint under dynamic loading |
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| 引用本文： | 王卫华 李夕兵 张义平 左宇军. Closure behavior of rock joint under dynamic loading[J]. 中南工业大学学报(英文版), 2007, 14(3): 408-412. DOI: 10.1007/s11771-007-0080-6 |
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| 作者姓名： | 王卫华 李夕兵 张义平 左宇军 |
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| 作者单位： | School of Resources and Safety Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | The normal compression tests on intact samples and artificial joints with different saw-tooth shape under cyclic loading and half-sine waves of different frequencies were performed by using Instron1342 servo-controlled material testing machine. The specimens were made artificially with mortar. The loading frequency ranged from 0.005 Hz to 0.1 Hz. The experimental results show that joint closure curves are non-linear and concave up. The stress-deformation curves under cyclic loading exhibit hysteresis and permanent set that diminish rapidly and keep constant finally on successive cycles. Normal displacement successively decreases from the joint J1 to J2, to J3 under the same normal loads regardless of frequency. Considering the loading frequency effect, normal displacement of joint J1 decreases with increasing the loading frequency except that the loading frequency is 0.05 Hz. Normal displacement of joint J2 increases with increasing the loading frequency. Normal displacement of joint J3 increases with increasing the loading frequency when the frequency ranges from 0.005 Hz to 0.05 Hz. Its normal displacement, however, becomes least when the loading frequency is 0.1 Hz.
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| 关 键 词： | 接头闭合性质 循环载荷 表面几何学 负载频率 |
| 收稿时间： | 2006-09-24 |
| 修稿时间： | 2006-09-242006-12-27 |
Closure behavior of rock joint under dynamic loading |
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| Wang Wei-hua , Li Xi-bing , Zhang Yi-ping and Zuo Yu-jun. Closure behavior of rock joint under dynamic loading[J]. Journal of Central South University of Technology, 2007, 14(3): 408-412. DOI: 10.1007/s11771-007-0080-6 |
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| Authors: | Wang Wei-hua Li Xi-bing Zhang Yi-ping Zuo Yu-jun |
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| Affiliation: | School of Resources and Safety Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The normal compression tests on intact samples and artificial joints with different saw-tooth shape under cyclic loading and half-sine waves of different frequencies were performed by using Instron1342 servo-controlled material testing machine. The specimens were made artificially with mortar. The loading frequency ranged from 0.005 Hz to 0.1 Hz. The experimental results show that joint closure curves are non-linear and concave up. The stress-deformation curves under cyclic loading exhibit hysteresis and permanent set that diminish rapidly and keep constant finally on successive cycles. Normal displacement successively decreases from the joint J1 to J2, to J3 under the same normal loads regardless of frequency. Considering the loading frequency effect, normal displacement of joint J1 decreases with increasing the loading frequency except that the loading frequency is 0.05 Hz. Normal displacement of joint J2 increases with increasing the loading frequency. Normal displacement of joint J3 increases with increasing the loading frequency when the frequency ranges from 0.005 Hz to 0.05 Hz. Its normal displacement, however, becomes least when the loading frequency is 0.1 Hz. |
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| Keywords: | joint closure behavior cyclic load surface geometry load frequency |
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