ZHU Zhen-de, XING Fu-dong, WANG Jun, et al. Experimental study on size effect on comperession strength of brittle rock based on grey theory[J]. 2004, 25(8期 刊出日).
ZHU Zhen-de, XING Fu-dong, WANG Jun, et al. Experimental study on size effect on comperession strength of brittle rock based on grey theory[J]. 2004, 25(8期 刊出日).DOI:
For white marble and limestone specimens of same diameters and different heights
uniaxial compression strength tests are carried out. The regularity that compression strength of brittle rock reduces with the increase of height–to-diameter ratio is certified. Based on the results of compression strength tests and the grey model GM(1
1)
the nonlinear equations between uniaxial compression strength and the height–to-diameter ratios of specimens are worked out. This empirical formula for brittle rock is uniform
and the difference of rock strengths with different rock characters and test conditions is reflected by a parameterα. Fortunately
the equations are very convenient to provide consultation and reference for evaluating the strength of the similar rock in the related engineerings.