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dc.contributor.authorSharifzadeh, Mostafa
dc.contributor.authorMirzaeian, Y.
dc.contributor.authorShahriar, K.
dc.identifier.citationSharifzadeh, M. and Mirzaeian, Y. and Shahriar, K. 2015. Tunnel Probabilistic Structural Analysis Using the FORM. Journal of Geological Research. 2015: pp. 1-9.

In this paper tunnel probabilistic structural analysis (TuPSA) was performed using the first order reliability method (FORM). In TuPSA, a tunnel performance function is defined according to the boundary between the structural stability and instability. Then the performance function is transformed from original space into the standard normal variable space to obtain the design point, reliability index, and also the probability of tunnel failure. In this method, it is possible to consider the design factors as the dependent or independent random parameters with arbitrary probability distributions. A software code is developed to perform the tunnel probabilistic structural analysis (TuPSA) using the FORM. For validation and verification of TuPSA, a typical tunnel example with random joints orientations as well as mechanical properties has been studied. The results of TuPSA were compared with those obtained from Monte-Carlo simulation. The results show, in spite of deterministic analysis which indicates that the rock blocks are stable, that TuPSA resulted in key-blocks failure with certain probabilities. Comparison between probabilistic and deterministic analyses results indicates that probabilistic results, including the design point and probability of failure, are more rational than deterministic factor of safety.

dc.publisherHindawi Publishing Corporation
dc.titleTunnel Probabilistic Structural Analysis Using the FORM
dc.typeJournal Article
dcterms.source.titleJournal of Geological Research

This open access article is distributed under the Creative Commons license

curtin.departmentDept of Mining Eng & Metallurgical Eng
curtin.accessStatusOpen access

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