I’m a Civil Engineer employee of Technip and I would kindly request support and clarification about the application of wind loads based on the SP 20.13330.2011.
The main concerns is about the reliability of the Modal analysis performed by STAAD for wind pressure according to SP, because we compared the results with a Russian software ‘’Scad’’ and we found a significant discrepancy in the load applied.
This discrepancy is only due to the dynamic part of the wind that is much less than the Russian software estimates, whereas the static part are the same, perhaps there is something wrong in the definition of the wind; please find below the steps that we are following:
Wind definition according Snip 2.01.07-2011
Application of wind with masses in the same load case
We need advices and a reliable procedure for define wind according Russian norm since we would to continue to design the structures for Russian Plants with Staad and don’t switch to another software.