Experimental Study on Deformation and Destruction of Post-peak Fractured Rock Mass
- DOI
- 10.2991/iccet-15.2015.257How to use a DOI?
- Keywords
- different confining pressure; fractured rock mass; triaxial test; Post-peak
- Abstract
The stress-strain curve of fractured rock mass can be divided into two parts, the pro-peak and post-peak. The pro-peak part of the rock stress-strain curve is generally stable and its mechanical behavior can be described with classical strength theory. Rock post-peak stress is very complex and generally is in unstable state, its mechanical behavior is hard to be described with classical strength theory. In this paper, the cylinder standard specimens with different angle of pre-existing transfixion joint are carried through conventional triaxial compression test under different confining pressure, in order to analyze deformation and destruction of fractured rock mass. The results show that the post-peak of fractured rock mass stress-strain curve changes unstable and very complex; Yield strength, peak intensity and residual strength of the rock specimens proportional to the change in confining pressure. Under the condition of low confining pressure, stress-strain relationship of fractured rock mass conform to the ideal elastic brittle model; under high confining pressure, its relations conform to the ideal elastic-plastic model. Within a certain range, relative to the confining pressure, the joint angle has greater impact on the damage type of fractured rock mass.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Luchen Zhang AU - Shuchen Li AU - Yang Ping PY - 2015/11 DA - 2015/11 TI - Experimental Study on Deformation and Destruction of Post-peak Fractured Rock Mass BT - Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015 PB - Atlantis Press SP - 1376 EP - 1380 SN - 2352-5401 UR - https://doi.org/10.2991/iccet-15.2015.257 DO - 10.2991/iccet-15.2015.257 ID - Zhang2015/11 ER -