Use this dialog to define the standard parameters for the Direct Analysis Method
- Direct analysis mode
- Select which mode to use, or select User-defined parameters to specify your own parameters.
- Notional loads generation
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- Notional load coefficient
- Specify the coefficient by which the gravity load is multiplied.
Note: If you selected an ANSI/AISC 360-10 mode, then this coefficient cannot be edited. This fulfills the ANSI/AISC 360-10 specifications for Structural Steel Buildings.
- Generate for gravity-only load combinations
- Select this option if you want to generate horizontal forces automatically for combinations which do not include lateral loads.
Note: This option is selected by default.
- Generate for lateral load combinations
- Select this option, and then indicate in which direction the notional loads should be generated for combinations which contain lateral loads.
- In the direction of the lateral load: notional loads are aligned with the acting lateral load.
- In one active direction only: notional loads are added in the direction which is closest to the lateral load.
- In two active directions independently: notional loads are created on both the X and Y axes.
- Active directions
- Select the directions in which the program will add the notional loads.
- Reduced Stiffness
- Specify the coefficients of stiffness reduction for steel and R/C members.
Note: If you selected an ANSI/AISC 360-10 mode, then the coefficient of stiffness reduction is limited to the values defined in the ANSI/AISC 360-10 specifications for Structural Steel Buildings.
- Second-order analysis parameters
- Opens the Non-linear Analysis Algorithm Options dialog which allows you to define the method and parameters to use for the analysis.
- Generate the DAM model without running the Direct Analysis
- Generates the DAM model without running the Direct analysis.