Hardening Soil model with small strain stiffness - Zace Services Ltd.
Hardening Soil model with small strain stiffness - Zace Services Ltd.
Hardening Soil model with small strain stiffness - Zace Services Ltd.
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Notion of tangent and secant <strong>stiffness</strong> moduli<br />
Initial <strong>stiffness</strong> modulus E o<br />
Unloading-reloading modulus E ur<br />
Secant <strong>stiffness</strong> modulus at 50 % of the ultimate deviatoric<br />
stress q f<br />
0<br />
250<br />
q [kpa]<br />
200<br />
150<br />
100<br />
50<br />
1<br />
E o<br />
1 E 50<br />
q 50<br />
E ur<br />
1<br />
q f<br />
0.5 q f<br />
σ 3 =const<br />
q un<br />
0 0.05 0.1 0.15 0.2 0.25<br />
EPS-1 [-]<br />
Remark: All classical soil <strong>model</strong>s require specification of E ur<br />
modulus (Cam-Clay, Cap etc..)<br />
Andrzej Truty ZACE <strong>Services</strong><br />
<strong>Hardening</strong> <strong>Soil</strong> <strong>model</strong> <strong>with</strong> <strong>small</strong> <strong>strain</strong> <strong>stiffness</strong>
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