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| 慢速往复荷载下砂土的细观力学与耗能机理探讨 | |
| 引用本文： | 孔亮,苏强,王燕昌,彭仁.慢速往复荷载下砂土的细观力学与耗能机理探讨[J].地下空间与工程学报,2012,8(2):268-273,300. |
| 作者姓名： | 孔亮 苏强 王燕昌 彭仁 |
| 作者单位： | 1. 青岛理工大学理学院,山东青岛266033;宁夏大学物理电气信息学院,银川750021 2. 宁夏大学物理电气信息学院,银川,750021 3. 宁夏大学校长办公室,银川,750021 |
| 基金项目： | 国家自然科学基金项目，山东省自然科学杰出青年基金项目 |
| 摘 要： | 以颗粒流数值软件PFC2D为计算平台,采用数值模拟技术并结合已有的土工试验结果,从宏、微、细观不同尺度和能量耗散角度,展开对砂土在慢速往复荷载作用下表现出的宏观力学响应、微观结构变化、细观力链演变以及能量耗散规律等方面的研究。结果表明数值模型能较好再现砂土的宏观力学响应,颗粒旋转、翻滚、下沉以及上升等内部结构变化,以及强弱力链的形成与重构,并能动态跟踪不同能量的变化,进一步揭示了砂土在连续变形过程中的细观力学机制及其能量耗散机理。 |
| 关 键 词： | 慢速往复荷载 砂土 颗粒流PFC 能量耗散 |
Mesoscopic Mechanics and Energy Dissipation Analysis of Sand Deformation Under Slow Cyclic Loading |
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| Kong Liang , Su Qiang , Wang Yanchang , Peng Ren.Mesoscopic Mechanics and Energy Dissipation Analysis of Sand Deformation Under Slow Cyclic Loading[J].Chinese Journal of Underground Space and Engineering,2012,8(2):268-273,300. | |
| Authors: | Kong Liang Su Qiang Wang Yanchang Peng Ren |
| Affiliation: | 1.Qingdao Technological University,School of Science,Qingdao 266033,China;2.Ningxia University, School of Physics & Electric Engineering,Yinchuan 750021,China;3.Ningxia University, Headmaster’s Office,Yinchuan 750021,China) |
| Abstract: | The PFC2D numerical simulation software is taken as the calculating platform to simulate the mechanic behavior of sands under slow cyclic loading.Based on the existing test results and simulation results,the change of microcosmic structure and the evolution of the force chain are studied from different scales(micro,meso and macro) and new angle based energy dissipation and thermomechanics.The results show that with this model the macro mechanical behavior of sands can be reappeared;the rotation,roll,going down and up of particle and the formation and reconstitution of force chain can be seen;the dynamic change of different energy can be tracked.The mesoscopic deformation mechanism and energy dissipation mechanism of sands are further revealed. |
| Keywords: | slow cyclic loading sands particle flow code(PFC) energy dissipation |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |