Effects of loading conditions on strength and deformability of fractured rocks - A numerical study
2014 (English)In: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium, Taylor & Francis Group, 2014, 365-368 p.Conference paper (Refereed)
This paper presents a systematic numerical study to evaluate the effects of two different loading conditions, namely the axial stress and axial velocity, on testing compressive strength and deformability properties of fractured rocks. The UDEC code was used to perform a series of numerical tests on two-dimensional fracture network (DFN) models, in the similar ways for the uniaxial and biaxial laboratory testing on intact rock samples. The obtained stresses and strains from these numerical experiments were used to estimate equivalent directional Young's modulus and fit the Mohr-Coulomb and Hoek-Brown failure criteria, represented by equivalent material properties defining these two criteria. The numerical results show that stress-strain behaviors changes by loading conditions with higher averaged axial stress under axial velocity condition than that under axial stress condition. Therefore, the effects of different loading conditions should be carefully considered for designing and interpretation of results for in-situ experiments with large volumes of fractured rocks.
Place, publisher, year, edition, pages
Taylor & Francis Group, 2014. 365-368 p.
Compressive strength, Deformation, Elastic moduli, Elasticity, Experiments, Fracture testing, Rock mechanics, Stress analysis, Structural design, Deformability properties, Equivalent material properties, Hoek-Brown failure, In-situ experiments, Laboratory testing, Numerical experiments, Numerical results, Stress-strain behaviors
IdentifiersURN: urn:nbn:se:kth:diva-146696DOI: 10.1201/b16955-60ISI: 000345985300056ScopusID: 2-s2.0-84901344637ISBN: 978-1-138-00149-7OAI: oai:DiVA.org:kth-146696DiVA: diva2:724896
2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014, Vigo, Spain, 26 May 2014 through 28 May 2014
QC 201501082014-06-132014-06-132015-01-08Bibliographically approved