I am running a DIRECT ANALYSIS but have some tension only members in my model. When I run the analysis I get the warnings like

**WARNING: TENSION/COMPRESSION SPECIFIED WITH PDELTA KG OR

DIRECT ANALYSIS. SO TENSION/COMPRESSION IS SWITCHED OFF.

**WARNING: DIRECT OR PDELTA KG ANALYSIS REQUESTED.

SO TENSION/COMPRESSION ANALYSIS IS NOT ALLOWED.

Seems like the MEMBER TENSION is being ignored by the program when DIRECT ANALYSIS is carried out. Is there any way for me to run a DIRECT ANALYSIS with MEMBER TENSION in it ?

As of now, there is no way to run a DIRECT ANALYSIS with MEMBER TENSION. You can do one of the following

Option 1

Run a DIRECT ANALYSIS with these members specified as TRUSS members instead of MEMBER TENSION. Check the member forces to find out for which load cases the axial forces in these members come out as compressive. Use the INACTIVE MEMBER command to deactivate these members for these cases and rerun the DIRECT ANALYSIS. The members can be active for other cases for which they develop tension force.

Option 2

Use a PDELTA nn ANALYSIS, which supports MEMBER TENSION, in lieu of using DIRECT ANALYSIS.

The same workaround applies for PDELTA KG ANALYSIS as well.