期刊
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
卷 11, 期 2, 页码 215-229出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17499518.2016.1232831
关键词
Rock mechanics; Hoek-Brown failure criterion; bearing capacity; probabilistic analysis; spatial variability; sparse polynomial chaos expansion
This paper presents a probabilistic analysis to compute the probability density function of the bearing capacity of a strip footing resting on a spatially varying rock mass. The rock is assumed to follow the generalised Hoek-Brown failure criterion. The uniaxial compressive strength of the intact rock (uc) was considered as a random field and the geological strength index was modelled as a random variable. The uncertainty propagation methodology employed in the analysis is the sparse polynomial chaos expansion. A global sensitivity analysis based on Sobol indices was performed. Some numerical results were presented and discussed.
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