Evaluating Elastic-Plastic Behaviour of Rock Materials Using Hoek–brown Failure Criterion

Abstract

As a matter of fact, the failure criteria only predict failure's initiation in materials. And, in order to predict post-yield behaviour of materials, a much complicated formulation for stress-strain relationship is required, which we know as plasticity theory. For instance, these formulations are developed based on Mohr-Coulomb criterion for soils and Drucker-Prager criterion for concrete. According to a majority of rock mechanics researchers, the empirical and experimental Hoek-Brown failure criterion is one of the well-progressed and suitable criteria, which can efficiently predict the rock failure initiation under different stress states for various types of intact rocks and rock masses. In this article, according to the suggestion by Heok explained in his paper of 1997, this rugged mentioned criterion is considered as a yield criterion and the elastic-perfect plastic behaviour of rock masses is determined using calculating material constitutive matrix's arrays in terms of Hoek-Brown's material constants and mechanical characteristics of rock materials in the general stress space, considering associated flow rule.

A novel solution for ground reaction curve of tunnels in elastoplastic strain softening rock masses

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Stabilization of problematic silty sands using microsilica and lime

“…Geotechnical engineering comprises a variety of different fields (Baziar, Ghorbani 2005;Ghorbani et al 2012;Ghorbani et al 2014;Hasanzadehshooiili et al 2012;Zavadskas et al 2010). Stabilizing the base soil is one of the most important issues, which is common in all the projects located on the problematic or weak soils or in the projects that due to the heavy constructional devices or applying loads need higher strength parameters for the base material (Rafalski, Ćwiąkała 2014).…”