| 考虑主应力方向影响的正交各向异性土体强度 |
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| 引用本文： | 吕玺琳,钱建固,黄茂松. 考虑主应力方向影响的正交各向异性土体强度[J]. 同济大学学报(自然科学版), 2015, 43(5): 0657-0661 |
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| 作者姓名： | 吕玺琳 钱建固 黄茂松 |
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| 作者单位： | 同济大学 岩土及地下工程教育部重点实验室，上海 200092；同济大学 土木工程学院，上海 200092,同济大学 岩土及地下工程教育部重点实验室，上海 200092；同济大学 土木工程学院，上海 200092,同济大学 岩土及地下工程教育部重点实验室，上海 200092；同济大学 土木工程学院，上海 200092 |
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| 基金项目： | 国家973计划青年科学家专题项目（2014CB049100）；国家自然科学科学基金项目（11372228）；上海市自然科学基金项目（13ZR1443800） |
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| 摘 要： | 利用材料组构与应力主轴的方向关系,对椭圆型角隅函数进行修正并引入到Mohr-Coulomb准则,建立了一个适用于正交各向异性土体的三维强度准则.通过所建立的准则,推导了考虑主应力轴方向变化影响的土体峰值应力比与中主应力比关系的计算公式,获得了土体峰值内摩擦角随中主应力比及大主应力偏转角的变化特性.通过与不同沉积面角度条件下的三轴试验及空心圆柱扭剪试验结果对比表明,理论公式预测的内摩擦角与试验结果一致.
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| 关 键 词： | 土体强度 主应力方向 正交各向异性 材料组构 |
| 收稿时间： | 2014-05-12 |
| 修稿时间： | 2014-07-09 |
Strength of Cross anisotropic Soils Considering Influence of Principal Stress Direction |
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| LV Xilin,QIAN Jiangu and HUANG Maosong. Strength of Cross anisotropic Soils Considering Influence of Principal Stress Direction[J]. Journal of Tongji University(Natural Science), 2015, 43(5): 0657-0661 |
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| Authors: | LV Xilin QIAN Jiangu HUANG Maosong |
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| Affiliation: | Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China,Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China and Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | According to the relationship between the material fabric and axis of major principal stress, the elliptic shape function was revised by adding a cross anisotropic term, and then a 3D cross anisotropic failure criterion was proposed based on the Mohr Coulomb criterion. The formula for calculating the peak stress ratio under different intermediate principal stress ratio condition was deduced, then the varying characteristics of peak friction angle with the intermediate principal stress ratio and the angle of major principal stress direction relative to material fabric were also obtained. A comparative study of a series of triaxial tests with different sample sedimentation angles and hollow cylinder tests shows that the predicted friction angle agrees well with the experimental results. |
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| Keywords: | soil strength principal stress direction cross anisotropy material fabric |
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