Akademik Veri Yönetim Sistemi
International Journal of Geomechanics, cilt.25, sa.9, 2025 (SCI-Expanded, Scopus)
In this study, an innovative, practical framework is introduced as an alternative to mitigate the demanding and time-consuming laboratory work usually required to determine unsaturated soil properties. This framework focuses on calibrating the constitutive material parameters of the Barcelona basic model (BBM), a widely implemented model for unsaturated soils. The approach involves implementing straightforward and rapid (i.e., practical) tests on samples of unsaturated soil. Subsequently, the results obtained from these tests, in conjunction with measurements from soil water retention curves, are utilized to deduct the BBM parameters. The initial values assigned to BBM parameters are established according to their specific physical interpretations, such as their influence on stiffness regulation or manifestation of yielding characteristics, as discerned from the outcomes of practical tests. To achieve an optimized calibration of the BBM parameters, a straightforward calculation scheme is employed. This method results in attaining reasonable predictions for BBM parameters, offering an efficient and effective solution for parameter determination in numerical modeling of unsaturated soil behavior. It should be emphasized that the proposed method has been validated for stress paths under constant suction deviatoric loading conditions. Its performance for other stress paths, such as those involving varying suction, remains unverified. This limitation should be considered when applying the proposed approach to numerical modeling of unsaturated soil behavior.