Modeling WT in Risa.

Hi maneesha0702

I dont know if I understood well the question,
If the center of gravity of the "T" bracings coincide with the center of gravity of the Chord elements, then you dont have excentricity.
If you are talking about an excentricity perpendicular to the plane of the truss, and you want to calculate automatically by Risa, the you can use rigid arms. But this is a lot of work. Normally this excentricity ( when you have a plate welded over the stem of the T), is not so big, and normally is not considered.

If the excentricity is big ( make a manual check), maybe you need to chanche the "T", for a box member.

If I understand your question correctly, I could be wrong but I don't believe Risa has the ability to axially load a member at a location other than it's neutral axis.

One idea would be to use the axial force from the member detail report to manually calculate the moment induced by the eccentricity from the gusset plate to the members neutral axis. Then apply a distributed or point load to the member in the correct direction to equal the calculated moment.