An empirical strength criterion for the Antalya tufa rock, southern Turkey

This paper formulates an empirical strength criterion for the heterogeneous Antalya tufa rock mass assuming that the heterogeneity effect is represented by the unit weight and the porosity of the tufa rock, which is highly variable from a geomechanical point of view. Unconstrained non-linear regress...

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Bibliographic Details
Published in:Environmental earth sciences 2019-09, Vol.78 (18), p.1-18, Article 567
Main Authors: Sopacı, Evrim, Akgün, Haluk, Daemen, Jaak J. K.
Format: Article
Language:English
Subjects:
Biogeosciences
Compressive strength
Constants
Criteria
Earth and Environmental Science
Earth Sciences
Empirical analysis
Environmental Science and Engineering
Geochemistry
Geology
Geomechanics
Heterogeneity
Hydrology/Water Resources
Metals
Nonlinear analysis
Original Article
Porosity
Regression analysis
Rock masses
Rocks
Tensile strength
Terrestrial Pollution
Tests
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Summary:This paper formulates an empirical strength criterion for the heterogeneous Antalya tufa rock mass assuming that the heterogeneity effect is represented by the unit weight and the porosity of the tufa rock, which is highly variable from a geomechanical point of view. Unconstrained non-linear regression analyses have been used to identify the strength criterion and material constants in terms of fitting an equation and determining its regression parameters. Prior to this approach, the fitting of the laboratory data to the failure criteria defined by Coulomb (Mem Acad R Des Sci 3:38, 1776 ), Bieniawski (J S Afr Inst Min Metal 74(8):312–320, 1974 ) and Hoek and Brown (J Geotech Eng Div ASCE 106(GT9):1013–1035, 1980 ) has been performed by means of constrained regression analyses. For the regression analyses, the results of the uniaxial and triaxial compressive strength tests along with the Brazilian tensile strength tests have been used. The regression analysis has been performed in two stages. In the first stage, the results of the uniaxial and triaxial compressive strength tests have been included in the analyses; in the second stage, the results of the Brazilian tensile strength tests have been added to the regression analyses performed in the first stage.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-019-8569-5