Nonlinear Parameters Form

The Nonlinear Parameters form requires somewhat different data depending on the type of analysis.  

• Solution Control options. The solution control parameters are different for each type of analysis. See Solution Control for more information.

• Material Nonlinearity Parameters options. The data in this area of the form is informational only. For nonlinear modal time-history (FNA) analysis, only link-object material nonlinearity is considered. For nonlinear static and nonlinear direct-integration time-history analysis, all link- and frame-object nonlinearity is considered.

Access the Nonlinear Parameters form as follows:

1. Click the Define menu > Load Cases command to display the Load Cases form.

2. Click the Add New Case button or highlight a previously defined load case and click the Add Copy of Case or the Modify/Show Case button to display the Load Case Data form.

3. Make one of the following selections:

   • Set the Load Case Type to Nonlinear or Nonlinear Staged Construction.

   • Set the Load Case Type/Subtype to Time History/Nonlinear Direct Integration.

4. Click the Nonlinear Parameters Modify/Show button.