期刊论文

Lu, Yani

英文

Cold Regions Science and Technology

0165-232X

2019

159

20-28

10.1016/j.coldregions.2018.11.017

It can be seen from the Fig. 5, Fig. 6, the elastic modulus and deviatoric stress are decreased first and then increased with increasing of fracture dip angle. The minimum point occurs at the 60 degrees, followed by 30 degrees and 90 degrees, the value of the intact samples (0 degree) is the highest. The ratios of σh and the maximum deviatoric stress are 54.83%, 43.13%, 37.29% and 33.23% after 0, 20, 40 and 60 freeze-thaw cycle(s), where σh is defined as the difference between maximum and

本校为其他机构

The deterioration of mechanical properties subjected to freeze-thaw action is a determining factor for natural rock masses in cold region engineering. Taking four cases of flaw sandstone as the research object, freeze-thaw cycles experiments and triaxial compression tests were conducted to analyze the mechanical properties after 0, 20, 40 and 60 freeze-thaw cycles. The damage evolution equation of freeze-thaw sandstone under load is established based on the Lemaitre strain equivalent principle and continuum damage mechanics theory. In this rega...