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Center of rigidity and center of torsion - iterative adjustment

Center of rigidity and center of torsion - iterative adjustment

I just thought of an idea for an add-in or other type of calculation that could be implemented in ARSA.

 

When dealing with irregular buildings, the engineer is challenged to design a system that has translational vibration in the first modes. This means zero or near zero eccentricity e0x and e0y.

The idea is to implement an iterative solution which can propose location, length and thickness of additional walls (or columns) to be added to the initial configuration. This addition shall impose zero or near zero eccentricity e0x and e0y.

 

I did that in a spreadsheet for a simple building by calculating the CM and CR for the original configuration. Then I updated the calculation by introducing new wall which gives zero e0x and e0y by simple Goal Seek option in Excel.

 

I guess this idea could be easily implemented in ARSA.

What do you think?
1 Comment
Very good tool, but I think that this is not an easy challenge! For multi stories irregular buildings it's not easy to define the "solution" to get zero eccntricity!

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