| 巴东组紫红色泥岩三轴压缩试验及本构模型研究 |
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| 引用本文： | 张家铭,刘宇航,罗昌宏,申思然.巴东组紫红色泥岩三轴压缩试验及本构模型研究[J].工程地质学报(英文版),2013,21(1):138-142. |
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| 作者姓名： | 张家铭 刘宇航 罗昌宏 申思然 |
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| 作者单位： | 1.中国地质大学武汉工程学院 武汉 430074; |
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| 基金项目： | 湖北省交通运输厅科技项目(2011-700-3-13)资助 |
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| 摘 要： | 采用MTS压力试验系统对巴东组紫红色泥岩进行了4个不同级别围压的三轴压缩试验和单轴试验。得到了巴东组紫红色泥岩在这5个围压下的全应力-应变曲线。根据试验结果,把全应力-应变曲线分为4个主要阶段,并分析了屈服强度、峰值强度、残余强度随围压的变化规律,结果表明,它们与围压成线性增大关系,满足库伦-莫尔强度准则。同时,根据试验曲线,利用双线性-线性软化-残余理想塑性模型来模拟巴东组紫红色泥岩,并给出了每一段的本构方程,确定了相关参数,可供类似的工程参考。
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| 关 键 词： | 岩石力学 巴东组泥岩 三轴压缩试验 本构模型 四线性模型 |
| 收稿时间： | 2012-03-08 |
TRIAXIAL COMPRESSION TEST AND CONSTITUTIVE MODEL FOR RED MUDSTONE OF BADONG FORMATION |
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| ZHANG Jiaming LIU Yuhang LUO Changhong SHEN Siran.TRIAXIAL COMPRESSION TEST AND CONSTITUTIVE MODEL FOR RED MUDSTONE OF BADONG FORMATION[J].Journal of Engineering Geology,2013,21(1):138-142. |
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| Authors: | ZHANG Jiaming LIU Yuhang LUO Changhong SHEN Siran |
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| Institution: | 1.Engineering Faculty,China University of Geosciences, Wuhan 430074;2.The Conductor Department of the Highway from Yichang to Badong of Hubei Province, Xingshan 443700 |
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| Abstract: | Using MTS testing machine, the triaxial compression test with four different confining pressures and the uniaxial compression test are carried out on the red mudstone of Badong formation. The complete stress-strain curves of five different confining pressures are obtained. According to the results, the complete stress-strain curve is divided into four main phases. The relationships of the yield strength, the peak strength, and the residual strength with confining pressure are analyzed, respectively. The results show that they get a linear increase relationship with the confining pressure. Also, the bilinear elastic-linear strain softening-residual ideal plastic model is found for the mudstone. The constitutive model of each part is discussed. The related parameters are calculated. |
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