Usage of UCSDSAND3 and UCSDCLAY
The syntax to use the soil models in FLAC is shown below. Definition of the soil parameters for UCSDCLAY and UCSDSAND3 can be found here. 1) UCSDSAND3 model model dll ucsdsand3 i=... j=...prop refShearModul ... refBulkModul ... frictionAng ... &
peakShearStra ... refPress ... pressDependCoe ... PTAng ... &
mType ... ca ... cb ... cc ... cd ... ce ... da ... db ... dc ... &
noYieldSurf ... grTab ... i=... j=... prop liquefac1 ... liquefac2 ... pAtm ... cohesi ... &
i=... j=... Input example:
2) UCSDCLAY model model dll ucsdclay i=... j=...
prop shearModul ... poissonRatio ... shearStrength ... peakShearStra ... &
noYieldSurf ... grTab ... Input example:
Backbone Curve
In the UCSD soil models, the shear stress-strain backbone curve is represented by the hyperbolic relationship when a modulus reduction curve is not provided. To define a modulus reduction curve please specify a table for grTAB with the corresponding shear strain and G/Gmax curve.-
grTab -- Table # for user-defined modulus reduction curve (G/Gmax). A separate FLAC command table is needed to define the modulus reduction curve. In this case, the number of the points specified will be used as the Number of yield surfaces.