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Statistical Analysis on Strength of Rock Based on YAI Concept

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Abstract:

In this paper, a new concept, YAI (yielding approach index), is firstly proposed to estimate the safety differences of rock and rockmass whose stress states are close to yielding. Secondly, in order to describe the intrinsic heterogeneity of strength of the same rock, the safety parameter ω, which is the phase complementary parameter of YAI, is supposed to be a stochastic variable in this paper and conform to the Weibull’s distribution. By analyzing the triaxial test data of five types of rocks, it can be found that ω as a stochastic variable evidently conforms to the Weibull’s distribution. Results in this paper give an important and useful reference to the safety analysis for geotechnical engineering.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1157-1162

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1157

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Online since:

June 2007

Authors:

Chuan Qing Zhang, Xia Ting Feng, Hui Zhou

Keywords:

Rock Strength, Statistical Analysis, Weibull Distribution, YAI

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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