| 软岩应变软化数值模型的建立与研究 |
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| 引用本文： | 杨超,崔新明,徐水平.软岩应变软化数值模型的建立与研究[J].岩土力学,2002,23(6):695-697. |
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| 作者姓名： | 杨超 崔新明 徐水平 |
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| 作者单位： | 1. 同济大学地下建筑与工程系,上海,200092
2. 浙江世贸房地产开发有限公司,浙江,310000 |
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| 摘 要： | 根据三轴压缩试验的应力-应变曲线，运用Hoek提出的由主应力圆包络线确定粘聚力和内摩擦角等效值的方法和曲线拟合的方法，研究了围压对软岩峰后软化特性的影响和软岩的宏观物性参数峰后应变软化规律，建立了峰后应变软化数值模型。利用该数值模型对三轴试验进行数值模拟，其结果与试验数据吻合。
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| 关 键 词： | 围压 峰后应软化 数值模型 软岩巷道 |
| 文章编号： | 1000-7598-(2002)06-0695-04 |
Establishment and study of strain-softening numerical constitutive model for soft rock |
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| YANG Chao,CHUI Xin-ming,XU Shui-ping.Establishment and study of strain-softening numerical constitutive model for soft rock[J].Rock and Soil Mechanics,2002,23(6):695-697. |
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| Authors: | YANG Chao CHUI Xin-ming XU Shui-ping |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. World Trade Center Zhejiang Real Estate Development Co. Ltd, Hangzhou 310000, China |
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| Abstract: | The influence of confining pressure on the post-peak softening rule of soft rock has been researched. Based on the stress-strain curve of triaxial experiments, the softening law of physical property parameters is studied; and a post-peak softening numerical model is established by means of the technique of determining the equivalent cohesion and friction and the curve-fitting. At last, the numerical simulation based on the model approximately matches the triaxial experiments. |
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| Keywords: | confining pressure post-peak softening numerical model |
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