A new response spectrum specification has been added to STAAD.Pro, ‘Eurocode 8. Design of structures for earthquake resistance’. General rules, seismic actions and rules for buildings’, BS EN 1998-1:2004.

The provisions for Eurocode 8- 2004 have been added to the Response Spectrum dialog box.

Enter the General, Loads Page of the Modelling Mode, and select the load case in the Load dialog box. Select the required load case name from the Load Case Details group and click on the Add button.

In the dialog box that is displayed, select the Response Spectra option from the list of items on the left and select the code Euro (EC8)-2004 to display the following:

Select the required parameters such as the Load Type and Combination Method and the direction that the spectrum is to be defined and click on the Add button to add the command to the input file.

For a full description of both implemented versions of the Eurocode 8 Response Spectrum command structure, see Section 5.32.10.1.4 of the Technical Reference manual .