Issue 70

H. A. Mohamed et alii, Frattura ed Integrità Strutturale, 70 (2024) 286-309; DOI: 10.3221/IGF-ESIS.70.17

To calculate equivalent viscous damping in relation to displacement ductility, many researchers created formulas. For instance, the comparable viscous damping was calculated as follows by Gulkan and Sozen [23]:

           eq 1 0.02 0.2 1  

(3)

Midorikawa et al. [24] modified the earlier equation by raising the initial damping in the elastic region and the factor 0.2 in front of the bracket to 0.25. The modified equation is as follows:





1

 

      



0.05 0.25 1

(4)

eq

Figure 26. Displacement ductility values of columns

Figure 27. Damping Ratio values of columns.

Figure 28. Effect of CR on displacement ductility and damping ratio of columns

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