Experimental study on anisotropic strength properties of sandstone
A series of uniaxial and triaxial tests are conducted on core samples of sandstone from Hunan highway region in China. The influence of the inherent anisotropy of sandstone on the mechanical characteristics, including the failure mode, failure strength and residual strength, has been investigated. The experimental results show that the tested sandstone represents the low anisotropy, and failure mode, peak failure strength and residual strength under different confining pressures is directly related to the inclination angle of specimen foliation with respect to the horizontal direction. Analyzing the experimental data on the basis of the Mohr-Coulomb failure criterion, the brittle-ductile transition properties under different loading orientations are brought out, and the relevant brittle-ductile transition confining pressure are predicted by failure criterion. The results show that the existence of oriented bedding planes has a strong influence on the brittle-ductile transition confining pressure.
anisotropy failure strength residual strength failure mode brittle-ductile transition sedimentary sandstone
X.M.Zhang J.S.Yang B.C.Liu
School of Civil Engineering and Architecture, Central South University, Changsha, China
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）