Calibration of Undrained Shear Strength Partial Factor Using Probability Theory

izvorni znanstveni rad

izvorni znanstveni rad

Calibration of Undrained Shear Strength Partial Factor Using Probability Theory

Vrsta prilog u časopisu
Tip izvorni znanstveni rad
Godina 2021
Časopis Tehnički glasnik
Volumen 16
Svesčić 1
Stranice TG-2020111313253, 8
DOI 10.31803/tg-2020111313253
ISSN 1846-6168
EISSN 1848-5588
Status objavljeno

Sažetak

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 (beta), 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 (gamma_{; ; ; c_u}; ; ; ) was proposed.

Ključne riječi

Eurocode 7 ; geotechnical design ; partial factor ; reliability analysis ; uncertainty ; undrained shear strength