Open AccessCalibration of Undrained Shear Strength Partial Factor Using Probability Theory
Author(s) -
Filip Dodigović,
Krešo Ivandić,
Božo Soldo,
Kristijan Grabar
Publication year - 2022
Publication title -
tehnički glasnik
Language(s) - English
Resource type - Journals
eISSN - 1848-5588
pISSN - 1846-6168
DOI - 10.31803/tg-20201113132539
Subject(s) - eurocode , reliability (semiconductor) , geotechnical engineering , structural engineering , shear strength (soil) , calibration , shear (geology) , shallow foundation , reliability engineering , mathematics , engineering , geology , statistics , bearing capacity , physics , soil science , soil water , petrology , power (physics) , quantum mechanics
Design in accordance with Eurocode 7 applies the partial factors of geotechnical parameters to take into account uncertainties of various sources. The prescribed values of partial factors are unique, even though the degree of uncertainty can vary significantly. This can lead to an unequal reliability level of structures designed using the same procedures and methods. This paper analyses the influence of undrained shear strength variability on the reliability index (β), using reliability theory and statistical methods. Analyses were performed in the case of a shallow footing designed in accordance with Eurocode 7, design approach 3. It is shown that reliability indexes of a shallow footing could be lower than the target values prescribed in Eurocode. To meet these values, additional elaboration and calibration of undrained shear strength partial factor (γcu) was proposed.