Hi: dear friends . I was wondering if someone could help me and answer my questions.
1): to accomplish P-Delta analysis according to what is mentioned in AISC 2016 or previous versions, is using PDelta GeoTransformation is enough or other attempts must be done?
and How can I get the difference forces due to P-Delta and P-delta effect? have any recorders been provided in opensees?
the difference between the 2 is related to the P-delta including displacement along the element from the chord .. if needed this effect can be obtained by modeling using multiple elements per member .. this is similar to procedure you would need to do using any commercial code that I know of, you might want to look at Appendix A of the following CSI manual for ETABS:
. I was wondering if someone could help me and answer my questions.