000170015 001__ 170015
000170015 005__ 20260316092629.0
000170015 0247_ $$2doi$$a10.1007/s10706-025-03562-9
000170015 0248_ $$2sideral$$a148603
000170015 037__ $$aART-2026-148603
000170015 041__ $$aeng
000170015 100__ $$aBelandria, Norly
000170015 245__ $$aStrength parameter estimation from triaxial data using the úcar failure criterion
000170015 260__ $$c2026
000170015 5060_ $$aAccess copy available to the general public$$fUnrestricted
000170015 5203_ $$aThis study presents a methodology for fitting the uniaxial compressive strength (UCS) and tensile strength (TS) of rocks and concrete material, using the nonlinear failure criterion proposed by Úcar. A selected of triaxial test data was compiled from the literature and systematically filtered to retain only data consistent with the brittle failure behaviour. For each lithology, the relationship between the principal stresses was modelled through nonlinear regression, allowing estimation of the UCS and TS parameters. These were used to calculate and adjust ξ = TS/UCS, parameter of the Úcar failure criterion, quantifying the variation using the Taylor series expansion. Failure envelopes models are proposed for the six rock types analyzed as well as for the concrete. A comparative case study based on Coburg limestone, using the proposed regression methodology of the Úcar criterion versus the Hoek and Brown criterion against Bayesian and heuristic alternatives, yielded successful results. A key advantage of the Úcar criterion is that it requires only UCS and TS as input parameters. The proposed methodology is especially valuable during the early stages of geotechnical and rock engineering projects, or under budget limitations, where experimental datasets are often sparse or unavailable. In addition, the general rock-type models developed herein enable strength prediction for intact rock in contexts where only lithology is known or available data are limited.
000170015 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E32-23R
000170015 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000170015 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000170015 700__ $$0(orcid)0000-0001-5091-9398$$aArlegui, Luis E.$$uUniversidad de Zaragoza
000170015 700__ $$aTorrijo, Francisco Javier
000170015 700__ $$aÚcar, Roberto
000170015 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000170015 773__ $$g44, 133 (2026), 15$$tGeotechnical and Geological Engineering$$x1573-1529
000170015 8564_ $$s2121467$$uhttps://zaguan.unizar.es/record/170015/files/texto_completo.pdf$$yVersión publicada
000170015 8564_ $$s1722563$$uhttps://zaguan.unizar.es/record/170015/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000170015 909CO $$ooai:zaguan.unizar.es:170015$$particulos$$pdriver
000170015 951__ $$a2026-03-16-08:16:51
000170015 980__ $$aARTICLE