The Soil Types tab is used to define the soil types found within the profile. If the soil properties are to be varied, then all layers for a given soil type are varied by the same amount. The following group boxes are found on this tab.
Basic properties of the half-space layer. The damping of the half-space layer does not change with strain so a good estimate of damping is important. The variation of the damping in the half-space layer is governed by the same model as all of the other soil types.
When the Darendeli & Stokoe model is selected for either the shear modulus reduction or material damping curve thie group box will become enabled. This properties are used to compue the Darendeli and Stokoe non-linear curves.
Allows for editting of the non-linear property curves. If you want to make the curve permanent for use in other prrojects considering adding the curve to the library with the Non-Linear Curve Dialog.
The non-linear properties are varied assuming a normal distribution with the provided values as the mean. The standard deviation can be computed using the Darendeli and Stokoe model, or a custom model. Regardless of the model it is required that the maximum and minium normalized shear modulus and minimum material damping values be considered and defined. Strata prevents the user from defined a shear modulus reduction less than 0.05 and a damping less than 0.01%.
When defining a custom model, the user can use a wide variety of functions and variables. In the formula for the standard deviation of the shear modulus, the following variables can be used: