Rock damage constitutive model based on residual intensity characteristics under freeze-thaw and load

被引：0

作者：

Zhang H. ^{[1
]}

Meng X. ^{[2
]}

Peng C. ^{[3
]}

Yang G. ^{[2
]}

Ye W. ^{[2
]}

Shen Y. ^{[2
]}

Liu H. ^{[2
]}

机构：

[1] School of Science, Xi'an University of Science and Technology, Xi'an

[2] College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an

[3] Infrastructure Branch of China Construction Eighth Bureau Third Construction Co., Ltd., Nanjing

来源：

Meitan Xuebao/Journal of the China Coal Society | 2019年 / 44卷 / 11期

关键词：

Constitutive model; Damage; Freeze-thaw cycle; Model parameter; Residual strength;

D O I：

10.13225/j.cnki.jccs.2018.1681

中图分类号：

学科分类号：

摘要：

The deformation and failure characteristics of rock are the fundamental mechanics problems directly faced in a geotechnical engineering construction project in cold region. To simulate the whole process of rock deformation and failure under freeze-thaw and load, the rock micro-elements in the axial direction are abstracted into four parts: the undamaged part, the freeze-thaw damaged part, the loading damaged part and the coupling damaged part of freeze-thaw and load, and the axial stress is supported by the four parts together, with the three damaged parts can share the residual stress. Using the Weibull distribution to describe the heterogeneity of rock materials, the coupling effect of the freeze-thaw and load on the total damage is expressed quantitatively based on the D-P failure criterion, and the damage constitutive model based on the characteristics of the residual strength is established for freeze-thaw and loaded rock. In terms of rock deformation and failure characteristics, the theoretical expression of the model parameters is derived. To verify the rationality of the model, the freeze-thaw cycle and triaxial compression tests of the red sandstone is conducted, the law of rock deformation and failure is analyzed, the effects of freeze-thaw cycles and confining pressure on their mechanical properties are revealed. It is shown that the damage model reflects the whole process of deformation and failure of freeze-thaw and loaded rock, at the same time, the effects of freeze-thaw cycles and confining pressure on the deformation properties of rock can be characterized. The evolution path of total damage reflects the consistency of the micro-mechanical response and macroscopic characteristics of the deformation and failure of rock, and the nonlinear influence characteristics of freeze-thaw and load on total damage expansion is portrayed, the macroscopic mechanical effects induced by mesoscopic damage evolution are explored which can provide a theoretical basis for revealing the mechanism of rock freeze-thaw damage. © 2019, Editorial Office of Journal of China Coal Society. All right reserved.

引用

页码：3404 / 3411

页数：7

共 18 条

[1] Liu H., Liu W., Study on relationship between the belt and road initiative and regional development strategies of China, Journal of Chinese Academy of Sciences, 32, 4, pp. 340-347, (2017)
[2] Yavuz H., Altindag R., Sarac S., Et al., Estimating the index properties of deteriorated carbonate rocks due to freeze-thaw and thermal shock weathering, International Journal of Rock Mechanics & Mining Sciences, 43, 5, pp. 767-775, (2006)
[3] Huseyin Y., Effect of freeze-thaw and thermal shock weathering on the physical and mechanical properties of an andesite stone, Bulletin of Engineering Geology and the Environment, 70, 2, pp. 187-192, (2011)
[4] Bayram F., Predicting mechanical strength loss of natural stones after freeze-thaw in cold regions, Cold Regions Science and Technology, 83-84, 12, pp. 98-102, (2012)
[5] Park J., Hyun C.U., Park H.D., Changes in microstructure and physical properties of rocks caused by artificial freeze-thaw action, Bulletin of Engineering Geology and the Environment, 74, 2, pp. 555-565, (2015)
[6] Xu G., Liu Q., Analysis of mechanism of rock failure due to freeze-thaw cycling and mechanical testing study on frozen-thawed rocks, Chinese Journal of Rock Mechanics and Engineering, 24, 17, pp. 3076-3082, (2005)
[7] Chen Y., Dai M., Liu M., Et al., Experimental investigation on freezing damage characteristics of granite with initial damage, Chinese Quarterly of Mechanics, 34, 1, pp. 74-80, (2013)
[8] Zhang H., Yang G., Experimental study of damage deterioration and mechanical properties for freezing-thawing rock, Journal of China Coal Society, 38, 10, pp. 1756-1763, (2013)
[9] Zhang H., Xie X., Peng C., Et al., Constitutive model for damage of freeze-thaw rock under three-dimensional stress, Chinese Journal of Geotechnical Engineering, 39, 8, pp. 1444-1452, (2017)
[10] Yuan X., Liu H., Liu J., A damaging model of jointed rock under coupled action of freezing and thawing, Chinese Journal of Rock Mechanics and Engineering, 34, 8, pp. 1602-1611, (2015)

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