From: Comparison of Different Numerical Models of RC Elements for Predicting the Seismic Performance of Structures
Column deformation
Column type
Coefficients
C 0
C 1
C 2
C 3
C 4
θ bb (17)
Rectangular-reinforced
0.019
1.650
1.797
0.012
0.072
Spiral-reinforced
0.006
7.190
3.129
0.651
0.227