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Calcuation of Torsional Acceleration

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Dear Members

The torsional acceleration is included to assess the serviceability design
of tall building. In Korea, the x- and y-direction acceleration is used
only for acceleration check.
However, the total acceleration which inclued x-, y-, and torsional
components is presented in the wind tunnel test report issued by other

The ISO and NBCC criteria are based on the along and across wind only.
What's your opinion about these points ?

And for the calculation of torsional components, the mass radius of
gyration is used.
Who knows  the way to calculate the torsional component ?

Your comment is very helpful for my work.

I'm greatly appreciated for your advice.

Thanks in advance

Youngkyu JU
Tel : +82-31-250-1170
Fax : +82-31-250-1131
Email : tallbldg(--nospam--at)

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