New Multi-Stage Triaxial Compression Test to Investigate the Loading-Rate Dependence of Rock Strength

2014 ◽  
Vol 37 (6) ◽  
pp. 20140061 ◽  
Author(s):  
K. Hashiba ◽  
K. Fukui
Keyword(s):  
Compression Test ◽  
Rock Strength ◽  
Loading Rate ◽  
Triaxial Compression ◽  
Triaxial Compression Test ◽  
Rate Dependence ◽  
Multi Stage

scholarly journals Loading Rate Dependence of Rock Strength Under Triaxial Compression

2021 ◽  
Vol 9 ◽  
Author(s):  
Yang Tang ◽  
Hailong Zhang ◽  
Jiang Xu ◽  
Seisuke Okubo ◽  
Xinrong Liu
Keyword(s):  
Strain Rate ◽  
Residual Strength ◽  
Rock Strength ◽  
Loading Rate ◽  
Triaxial Compression ◽  
Confining Pressure ◽  
Rate Dependence ◽  
Peak Strength ◽  
Compression Tests ◽  
Tenfold Increase

Knowledge regarding the time-dependent behavior of rocks is essential to estimate the long-term deformation and stability of underground structures. The rock strength increases with the increasing loading rate. However, the loading rate dependence in postfailure regions under confining pressure remains unclear. In this study, triaxial compression tests were conducted on four types of rocks to examine the loading rate dependence in both peak and postfailure regions. Results demonstrate that an increase in residual strength with a tenfold increase in the strain rate was approximately proportional to 4% of the residual strength. Furthermore, the increase in peak strength with a tenfold increase in the strain rate increased at a rate of approximately 4% of peak strength. The obtained results were applicable to all the sample rocks and can be easily employed for improving the constitutive equations. Finally, the effect mechanism of the confining pressure on the loading rate dependence of rock strength is discussed.

Shearing characteristics of SCP-inserted clay specimens in triaxial compression test

2015 ◽  
Vol 11 (1) ◽  
pp. 209-219 ◽  
Author(s):  
Yoon-Sik Choo ◽  
Wanjei Cho ◽  
Choong-Ki Chung
Keyword(s):  
Compression Test ◽  
Triaxial Compression ◽  
Triaxial Compression Test
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