温度与荷载作用下岩石损伤模型

doi:10.13722/j.cnki.jrme.2014.s2.001

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摘要基于岩石内部缺陷分布的随机性，运用损伤力学理论，建立温度–荷载耦合作用下岩石的损伤模型，确定模型参数，分析岩石细观损伤所诱发的宏观力学性能演化途径，预测变形破坏规律，并通过试验验证模型的合理性。结果表明：温度–荷载总损伤演化途径反映了岩石内部微裂纹闭合、萌生、扩展贯通，出现宏观裂纹及产生破坏的全过程；在高温的作用下，盐岩的损伤程度加剧，宏观上表现为岩石力学性质的劣化；随着围压的升高，盐岩的损伤劣化程度减小，相同损伤程度时应变增加，宏观上表现为岩石抵抗破坏能力的增强和塑性变形的增加。

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	张慧梅1
	雷利娜1
	杨更社2

关键词 ：岩石力学；损伤；温度&ndash, 荷载耦合；力学特性

Abstract：The interior defect is random distribution in rock. The damage model of rock under coupling action of temperature and load was established by the damage mechanical theory，and the model parameters were determined. The evolutionary route of rock macro-mechanical properties induced by micro-structural damage was analyzed. The deformation and failure laws of rock were predicted and the rationality of damage model was verified. It is shown that the total damage evolutionary route under temperature and load coupling action reflects the whole process of closure，initiation，propagation and coalescence of microcrack in rock，and then the appearance of macroscopic crack and the disruption of rock. Under high temperature，the rock damage intensifies， which is displayed on the deterioration of the mechanical properties of rock on the macro level. With increasing of the confining pressure，the damage degree and deterioration decrease and the strain increases for the same extent of damage，which is manifested on the enhanced ability to resist destruction and the increased plastic deformation in macroscopic view.

Key words： rock mechanics damage temperature-load coupling mechanical properties

引用本文:

张慧梅1，雷利娜1，杨更社2. 温度与荷载作用下岩石损伤模型[J]. 岩石力学与工程学报, 2014, 33(S2): 3391-3396.
ZHANG Huimei1，LEI Lina1，YANG Gengshe2. DAMAGE MODEL OF ROCK UNDER TEMPERATURE AND LOAD. , 2014, 33(S2): 3391-3396.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.001 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3391

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