| 地壳岩石剪切失稳的应力与应变准则 |
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| 引用本文： | 秦四清,泮晓华.地壳岩石剪切失稳的应力与应变准则[J].地球物理学报,2011,54(7):1767-1771. |
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| 作者姓名： | 秦四清 泮晓华 |
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| 作者单位： | 中国科学院地质与地球物理研究所 工程地质力学重点实验室,北京 100029 |
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| 基金项目： | 中国科学院知识创新工程项目，国家自然科学基金重点项目 |
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| 摘 要： | 本文建立了岩石体膨胀起点与峰值点之间应力与应变关系的解析表达式,分别给出了其剪切失稳应力与应变准则.考虑到地壳岩石缓慢加载作用使其均匀性指标的减小效应,本文也分别给出了简化的适用于脆性破坏预测的应力与应变准则.实例表明该应变准则可用于崩塌与强震等脆性破坏问题的预测分析.
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| 关 键 词： | 体膨胀 长期强度 脆性破坏 失稳准则 |
| 收稿时间： | 2011-04-06 |
Stress and strain instability criteria for crustal rocks under shear condition |
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| QIN Si-Qing,PAN Xiao-Hua.Stress and strain instability criteria for crustal rocks under shear condition[J].Chinese Journal of Geophysics,2011,54(7):1767-1771. |
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| Authors: | QIN Si-Qing PAN Xiao-Hua |
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| Institution: | Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | The analytical stress and strain expressions between the volumetric dilatancy boundary and peak strength during rock deformation are derived and the stress and strain instability criteria under shear state are also presented for rock specimens and crustal rockmass, respectively. The analysis on some brittle failure cases indicates that the strain criterion can be used to predict the occurrence of rock avalanches and strong earthquakes. |
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| Keywords: | Volumetric dilatancy Long-term strength Brittle failure Instability criteria |
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