Respected Sir,
I am doing a column of 24 meter height and 1 meter diameter. When i checked the vortex shedding box in Design Constraint, PVElite increases moment at basering at about 4-5 times because of which bolt area requirements, base plate and compression ring thickness increases about 4-5 times. My column design wind speed is 140.5 km/hr and in PVElite output the 1st and 2nd Critical speed worked out are 153.5 and 959.3 km/hr respectively. As it is clear by above data, column design wind speed is not matched with Critical Wind Speed then why the moment increases.

Please Clarify.
Warm Regards,
Saurabh Gajwani
Triune Projects Pvt. Ltd.
New Delhi (110044)