Response Spectrum UBC 97 Function Definition Form

See Response Spectrum Code Function Definition Form for details about using the form. The parameters for this code are as follows:

The 1997 UBC response spectrum function is constructed as shown in Figure 163 in Chapter 16 of the 1997 UBC. The parameters you enter are seismic coefficients Ca and Cv. Any positive, nonzero value can be specified for the seismic coefficients. See Tables 16Q and 16R in the 1997 UBC for typical values of these coefficients.

 

Access the Response Spectrum UBC 97 Function Definition form as follows:

 

Click the Define menu > Functions > Response Spectrum command to display the Define Response Spectrum Functions form.  Then do one of the following:

    • Select UBC 97 Spectrum in the Choose Function Type to Add drop-down list and click the Add New Function button.

    • Highlight a previously defined UBC 97 Spectrum response spectrum function definition and click the Modify/Show Spectrum button.