Study on the Freeze-Thaw Damage of Granite Under Impact Loading

The freeze-thaw damage of granite was studied used SHPB tests and numerical simulation in the paper. All the granite samples were taken from high altitude localities in Tibet, China, which were made impact loading test after freeze-thaw cycles. The strain rate was unified in the use of SHPB tests co...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2020-04, Vol.38 (2), p.1053-1063
Main Authors: Huang, Yinghua, Liang, Xuli, Wen, Lei, Chang, Jiangfang
Format: Article
Language:English
Subjects:
Civil Engineering
Computer simulation
Constitutive relationships
Cycles
Dynamic stability
Earth and Environmental Science
Earth Sciences
Freeze thaw cycles
Freeze-thaw durability
Freeze-thawing
Geotechnical Engineering & Applied Earth Sciences
Granite
High altitude
Hydrogeology
Impact damage
Impact loads
Incident waves
Mathematical models
Open pit mining
Original Paper
Simulation
Slope stability
Stability analysis
Strain rate
Terrestrial Pollution
Waste Management/Waste Technology
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Summary:The freeze-thaw damage of granite was studied used SHPB tests and numerical simulation in the paper. All the granite samples were taken from high altitude localities in Tibet, China, which were made impact loading test after freeze-thaw cycles. The strain rate was unified in the use of SHPB tests combined with numerical simulation to analyze the relationship between dynamic strength and freeze-thaw cycles. The results shows, under different freeze-thaw cycles, the shapes of the reflected and transmitted waves before and after freeze-thaw are different, mainly reflected in the great difference of the curves before and after the peak. With the increase of the freeze-thaw cycles, the peak value of the strength curves decrease apparently and the peak stress decreases apparently after 10 cycles. Samples have different strain rates with the same incident wave under different freeze-thaw cycles. The dynamic strength of granite is associated with the strain rate and the freeze-thaw cycles. Study on the freeze-thaw damage of granite under impact loading is the basis of the granite dynamic constitutive relation and it is important to analyze the stability of open-pit mine slope in seasonal frozen regions.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-019-01072-z