Experimental study on crack coalescence behavior of double unparallel fissure-contained sandstone specimens subjected to freeze-thaw cycles under uniaxial compression

2019 ◽  
Vol 158 ◽  
pp. 166-181 ◽  
Author(s):  
Y. Niu ◽  
X.P. Zhou ◽  
J.Z. Zhang ◽  
Q.H. Qian
Keyword(s):  
Experimental Study ◽  
Uniaxial Compression ◽  
Crack Coalescence ◽  
Freeze Thaw

scholarly journals Investigation on Crack Coalescence Behaviors for Granite Containing Two Flaws Induced by Cyclic Freeze-Thaw and Uniaxial Deformation in Beizhan Iron Mining, Xinjing, China

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-19 ◽  
Author(s):  
Y. Wang ◽  
C. H. Li
Keyword(s):  
Uniaxial Compression ◽  
Shear Failure ◽  
Ct Imaging ◽  
Crack Coalescence ◽  
Tensile Failure ◽  
Shear Cracks ◽  
Growth Trend ◽  
Rock Bridge ◽  
Freeze Thaw ◽  
Approach Angle

This work is aimed at investigating the effect of freeze-thaw (F-T) cycle on the crack coalescence behavior for granite samples containing two unparallel flaws under uniaxial compression. The flaw geometry in the samples was a combination of an upper inclined flaw with a horizontal flaw underneath. After the uniaxial compression experiments, macroscopic crack pattern description and the mesoscopic posttest CT imaging were used to reveal the effects of F-T cycle on the crack coalescence morphology at the rock bridge area. Results show that the stress–strain curves present a fluctuating growth trend and stress drop phenomenon becomes weaker with increasing F-T cycles. In addition, three different kinds of cracks (tensile-wing cracks, oblique shear cracks, and antiwing cracks) were observed, and the crack coalescence pattern was influenced by the F-T cycles and approach angle. A mix of tensile and shear failure occurs for the sample subjected to weak F-T treatment, and simple tensile failure occurs for the sample subjected to high F-T treatment. Moreover, CT imaging reveals a crack network pattern at the rock bridge area, and it is found that the fracture degree deceases with increasing F-T cycles and increases with the increasing approach angle. It suggests that the rock bridge area can be easily fractured for the sample subjected to high F-T cycles. Results of this study can provide theoretical foundation for the instability predication of fractured rock structures in cold regions.

Seismic behaviors of squat reinforced concrete shear walls under freeze-thaw cycles: A pilot experimental study

2016 ◽  
Vol 124 ◽  
pp. 49-63 ◽  
Author(s):  
Wei Yang ◽  
Shan-Suo Zheng ◽  
De-Yi Zhang ◽  
Long-Fei Sun ◽  
Chuan-Lei Gan
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Shear Walls ◽  
Freeze Thaw ◽  
Seismic Behaviors

Experimental Study on Uniaxial Compression Behavior of Fissured Loess Before and After Vibration

2022 ◽  
Vol 22 (2) ◽  
Author(s):  
Jian Xu ◽  
Liyang Zhou ◽  
Yanfeng Li ◽  
Jiulong Ding ◽  
Songhe Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Uniaxial Compression ◽  
Compression Behavior ◽  
Before And After
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