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Study on a Damage Model and Uniaxial Compression Simulation Method of Frozen–Thawed Rock

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Abstract

To evaluate the deterioration degree of rock freeze–thaw damage in cold area engineering, it is necessary to establish an accurate freeze–thaw rock damage model and its uniaxial compression numerical simulation method. Therefore, indoor freeze–thaw cycle tests of saturated yellow sandstone were carried out. The porosity and P-wave velocity were measured, and uniaxial compression tests were conducted after different numbers of freeze–thaw cycles. The findings indicate that with an increasing number of freeze–thaw cycles, the elastic modulus, peak strength and wave velocity of the yellow sandstones gradually decrease, while the peak strain and the average porosity increase. The energy evolution law with different numbers of freeze–thaw cycles was analyzed, a freeze–thaw damage model was established according to the relative change in the dissipated energy ratio before and after freezing–thawing, and the accuracy of this damage model and five common damage models was evaluated by the uniaxial compressive strength and peak strain. The functional relationship between mesoscopic parameters and the number of freeze–thaw cycles was formulated to establish a numerical simulation method for saturated sandstones under uniaxial compression after freeze–thaw cycling. The reliability of the numerical method was verified by comparing the stress–strain curve, peak stress, peak strain and energy law with the experimental results.

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Acknowledgements

This work was supported by the Natural Science Foundation of Shandong Province (ZR2016JL018), Research and Innovation Team Project of College of Civil Engineering and Architecture, Shandong University of Science and Technology (2019TJKYTD02), and Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team (Disaster prevention and control team of underground engineering involved in sea).

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Contributions

QF: Supervision, Conceptualization, Writing—review and editing. JJ: Formal analysis, Methodology, Software, Writing—original draft. SZ: Validation, Software. WL: Conceptualization, Data curation, Writing—review. XY: Resources, Validation. WL: Investigation.

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Correspondence to Weiwei Liu.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Feng, Q., Jin, J., Zhang, S. et al. Study on a Damage Model and Uniaxial Compression Simulation Method of Frozen–Thawed Rock. Rock Mech Rock Eng 55, 187–211 (2022). https://doi.org/10.1007/s00603-021-02645-2

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  • DOI: https://doi.org/10.1007/s00603-021-02645-2

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