Hardening Soil model with small strain stiffness - Zace Services Ltd.

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Setting initial state variables: γ PS o and p co 600 q [kPa] 500 400 300 200 100 Shear mechanism Cap surface σ ο σ SR 0 0 100 200 300 400 500 p [kPa] Procedure: For given σ SR state compute γo PS f 1 = 0 from plastic condition For given σ SR state compute p co from plastic condition f 2 = 0 Andrzej Truty ZACE Services Hardening Soil model with small strain stiffness
Setting initial state variables: γ PS o and p co Remarks = Ko NC (approximate Jaky’s formula) 1 K SR o 2 K SR o ≈ 1 − sin(φ) in the standard applications = 1 for case of isotropic consolidation (used in triaxial testing for instance) 3 For sands notion of preconsolidation pressure is not as meaningful as for cohesive soils hence one may assume OCR=1 and effect of density will be embedded in H and M parameters Andrzej Truty ZACE Services Hardening Soil model with small strain stiffness
Page 1 and 2: Hardening Soil model with small str
Page 3 and 4: Introduction HS model was initially
Page 5 and 6: Notion of tangent and secant stiffn
Page 7 and 8: Notion of treshold shear strain γ
Page 9 and 10: HS model: general concept Double ha
Page 11 and 12: Stiffness stress dependency Remarks
Page 13 and 14: How does it work N-1 N N+1 plot fr
Page 15: Setting initial state variables: γ
Page 19 and 20: Material properties Parameter Unit
Page 21 and 22: Example: triaxial test on dense Hos
Page 23 and 24: Example: triaxial test on dense Hos
Page 25 and 26: Estimation of material properties:
Page 37 and 38: Excavation in Berlin Sand: FE discr
Page 39 and 40: Excavation in Berlin Sand: Wall def
Page 41 and 42: Excavation in Berlin Sand: Soil def

Hardening Soil model with small strain stiffness - Zace Services Ltd.

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