Force Response Operators Force Response Operators

Response operators of the forces in beams and connectors are obtained with the command:


and the available options are:


     -NODE, :NODE_SEL(1), :NODE_SEL(2), :NODE_SEL(3), :NODE_SEL(4)



     -STANDARD, L(1), T(1), ..... L(n), T(n)

     -SUMMARY, L(1), T(1), ..... L(n), T(n)


     -FILE, YES/NO

Here, one will only receive RAOs for elements which match the selectors defined with the -CLASS, -NODE, and -ELEMENT options as described previously.

The extent of the reports which will be produced is controlled by which of the three report types -DETAIL, -STANDARD or -SUMMARY were selected and the report limits. With a -STANDARD or -SUMMARY report, L(i) and T(i) are used to specify a range of values for which a given report will be printed. The value used for determining the range is the axial load. One can specify as many ranges as he desires, or he can omit all data following the option. If no ranges are specified, one report for all ranges of axial load will be printed. An option of -STANDARD will result in a report of the RAOs for the maximum axial force over all selected periods and headings for each member selected. If one specifies an option of -SUMMARY, this report will be reduced to the RAOs for only the selected element in each class which has the greatest axial force. Finally, if one specifies -DETAIL as an option, the original report will be expanded to include checks of all members for all periods and headings at all load points. Notice that -DETAIL, -STANDARD, and -SUMMARY may all be used on the same command to produce reports of all three types. Also, if no options are specified, then a default of -STANDARD is assumed.

The options -REPORT and -FILE are used to control whether or not the RAOs are written to a post-processing file, or the standard output file. The default is to write them only to the output file. If -FILE YES is specified, then the RAOs will be written to both places. If -FILE YES -REPORT NO is specified, then the RAOs will only be written to the post-processing file.