====== SOIL Module Analysis Options ======

{{ :sassi:submodeler:soilopt.png |}}

  * **Nr. of Fourier Components** - Type the number of values to be used in the Fourier transform. The value is the same as set in the Analysis Options - [[sassi:submodeler:options:SITE]] dialog box.
  * **Time Step of Control Motion** - Type the time step of control motion (sec). The value is the same as set in the Analysis Options - [[sassi:submodeler:options:SITE]] dialog box .
  * **Number of Values** - Type the time number of acceleration values to be read from the time history file.
  * **Multiplication Factor** - Type the multiplication factor for scaling the time history. Use only if Max. Value for Time History is blank.
  * **Max. Value for Time History** (in g’s) - Type the maximum value of time history to be used. The values of the time history will be scaled to this value. Use only if Multiplication Factor is blank.
  *  **Acceleration of Gravity** - This acceleration value is used for free-field or site response analysis using SOIL module.  The acceleration of gravity value should be in ft/sec2 or in m/sec2, depending if the British System %%(BS)%% or International System %%(IS)%% is used.  If BS is used, then the soil weight density should be input in lb/ft3, while if IS is used, then the soil weight density should be input in kN/m3. A change of this value does not affect the value used for SSI analysis in [[sassi:submodeler:options:SITE]] options.
  * **Number of Header Lines** - Type the number of header lines at the beginning of the acceleration time history file.
  * **Cutoff Frequency** - This frequency will be used to truncate the FFT spectra.
  * **Control Point Layer** - Type the layer number of the control point. The value is the same as set in the Analysis Options - SITE dialog box
  * **Acceleration History File** - Type the full path and name of the time history file. To view the time history file, use the Plot / Time History command.
  * **Assign as Outcrop Motion** - Select this option if you want to assign the input motion as outcrop motion.
  * **Input Data** - Select this button to define data for the liquefaction analysis (ACS SASSI LIQUEF module). (Not available)
  * **Layer Number** - Select the active layer number. All following options apply to this layer.
  * **Property Number** - Type the soil layer property number for the active layer(see MAIN manual)
  * **Dynamic Soil Property** - Select the dynamic soil property for the active layer. 
  * **Accelerations** - Select acceleration output options for the active layer.
  * **Response Spectrum** - Select response spectrum output options for the active layer.
  * **Stresses & Strains** - Select stress and / or strain output options for the active layer.
  * **Spectral Amplification Factor** - Select spectral amplification factor output options for the active layer.
  * **Fourier Spectrum** - Select Fourier spectrum output options for the active layer.
  * **Input for Nonlinear SSI Analysis** - For the nonlinear near-field soil SSI analysis option, the user needs to click on the Liquefaction Analysis Input Data. Then, in the new opened file the user needs to input a value equal to zero (no liquefaction) on the first space in the file. Then, the user needs to save this file. This file has the extension .liq.
  * **Nonlinear Time Domain** -  Select nonlinear soil option for use
  * **Subincrements Per Timestep** – Number of sub-increments between time step.
  * **Displacement Convergence Error** -
  * **Force Convergence Error** -
  * **Equilibrium Iterations** -
  * **Bedrock interface** -
  * **Damping Type** -
  * **Mass Matrix Mult.** -
  * **Stiff Matrix Mult.** -
  * **Curve fit Hyperbolic Parameters** -
  * **Beta** -
  * **S exponent** -
  * **Reference Strain** -
  * **Viscosity** -