Development of a new advanced elastoplastic constitutive model that considers soil behavior at small strains: the EPHYSS model
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hdl:2117/374596
Tipus de documentArticle
Data publicació2022-08
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Abstract
The Elastoplastic Hysteretic Small Strain (EPHYSS) model is an advanced elastoplastic model as a result from the combination of the Hysteretic Quasi-Hypoelastic (HQH) model that considers strain-induced anisotropy and can reproduce the nonlinear reversible, hysteretic and dependent on recent history soil behavior, and the Cap-Cone Hardening Soil Modified (HSMOD) model that can reproduce soil plastic behavior. EPHYSS model uses state variables that define different short and long-term memory levels which provide it with robustness for the reproduction of soil hysteretic behavior and confers it a great versatility and adaptability to experimental results. It also corrects some inconsistencies of the Hardening Soil with Small Strain Stiffness (HS-SS) model of Plaxis whose effects can have a considerable influence on the numerical simulations of boundary problems. The performance of EPHYSS and a comparison with the HS-SS model is presented in some experimental and numerical tests, and in a boundary value problem of a large excavation in Barcelona.
CitacióCastellon, J.; Ledesma, A. Development of a new advanced elastoplastic constitutive model that considers soil behavior at small strains: the EPHYSS model. "International journal for numerical and analytical methods in geomechanics", Agost 2022, vol. 46, núm. 11, p. 1991-2032.
ISSN0363-9061
Versió de l'editorhttps://onlinelibrary.wiley.com/doi/10.1002/nag.3360
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