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dc.contributor.authorLedesma Villalba, Alberto
dc.contributor.authorGens Solé, Antonio
dc.contributor.authorAlonso Pérez de Agreda, Eduardo
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica
dc.identifier.citationLedesma Villalba, A.; Gens, A.; Alonso, E.E. Estimation of Parameters in Geotechnical Backanalysis: I. Maximum Likelihood Approach. Computers and geotechnics (1996, vol. 18, no. 1, pp. 1-27).
dc.description.abstractThe estimation of soil and rock parameters based on field instrumentation data is a common procedure in geomechanics. The use of system identification and optimization techniques allows the performance of this type of analyses in a more rational and objective manner. In this paper a probabilistic formulation for the backanalysis problem is presented. The procedure described involves the evaluation of the measurement covariance matrices, which are derived for some geotechnical instruments used in field instrumentation. The algorithm used to solve the mathematical problem of optimization is also presented, as well as its coupling to a finite element code. The algorithm requires the computation of the sensitivity matrix, which can be evaluated “exactly” in terms of the finite element method. Finally, a synthetic example, based on the excavation of a tunnel, is presented in which the elastic modulus E and the Ko parameter of the material are identified from measured displacements. The effect of the number of measurements and their error structure is also discussed.
dc.format.extent27 p.
dc.subject.lcshRock mechanics--Mathematical models
dc.subject.lcshSoil mechanics--Mathematical models
dc.subject.lcshProbabilities--Mathematical models
dc.subject.lcshParameter estimation
dc.subject.othergeotechnical parameters
dc.subject.otherprobabilistic methods
dc.titleEstimation of Parameters in Geotechnical Backanalysis: I. Maximum Likelihood Approach
dc.subject.lemacProbabilitats -- Models matemàtics
dc.subject.lemacParàmetres (Matemàtica) -- Identificació
dc.subject.lemacMecànica dels sòls -- Models matemàtics
dc.subject.lemacMecànica de roques -- Models matemàtics
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access

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