Open AccessSTATISTICAL-NUMERICAL ANALYSIS FOR PULLOUT TESTS OF GROUND ANCHORS
Author(s) -
Juraj Chalmovský,
Jan Štefaňák,
Lumír Miča,
Zdeněk Kala,
Šarūnas Skuodis,
Arnoldas Norkus,
Daiva Žilionienė
Publication year - 2017
Publication title -
the baltic journal of road and bridge engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.259
H-Index - 21
eISSN - 1822-4288
pISSN - 1822-427X
DOI - 10.3846/bjrbe.2017.17
Subject(s) - finite element method , geotechnical engineering , structural engineering , displacement (psychology) , linear regression , range (aeronautics) , engineering , regression analysis , mathematics , statistics , psychology , psychotherapist , aerospace engineering
The paper presents an application of statistical and numerical methods for the determination of the forcedisplacementcurves and that of pullout capacity of prestressed grouted ground anchors installed in Miocene clay. A regressionanalysis of data from a database of acceptance test records for ground anchors to create has been performed, theforce-displacement curve of the tested anchor corresponding to the range of loads applied for acceptance tests has beencreated. A linear regression model, employing the weighted least squares method and robust standard errors techniqueswere concluded to serve as a reliable statistical method suitable for achieving this goal. The discovered linear regressiondependence then served as a lower control limit for the displacement values calculated at the anchor head applying thenumerical model. A finite element model has been created to predict the behaviour of ground anchors being installed infine-grained soils. The developed numerical model that employs Mohr-Coulomb strength criterion constitutive modelevaluates the influence of high-pressure grouting by development additional radial stresses and that of an increment offixed length diameter.