Bearing capacity of spatially random rock masses obeying Hoek–Brown failure criterion. Issue 2 (3rd April 2017)

• Record Type: Journal Article
• Authors: Al-Bittar, Tamara; Soubra, Abdul-Hamid
• Is Part Of: Georisk. Volume 11:Issue 2(2017)
• Page Start: 215
• Page End: 229
• Publication Date: 2017-04-03
• Subjects: Rock mechanics -- Hoek–Brown failure criterion -- bearing capacity -- probabilistic analysis -- spatial variability -- sparse polynomial chaos expansion; Environmental risk assessment -- Periodicals; Hazardous geographic environments -- Risk assessment -- Periodicals; Reliability (Engineering) -- Periodicals; Risk management -- Periodicals; 624.151
• DOI: 10.1080/17499518.2016.1232831
• Languages: English
• ISSNs: 1749-9518

Abstract

ABSTRACT: 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 ( σ c) 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.