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Table 2 Column groups used in the parametric study.

From: Concentrically Loaded Circular RC Columns Partially Confined with FRP

Group#a \( f^{\prime}_{c} \) Longitudinal steel
\( \phi \) 10 mm (#3)
Transverse steel stirrups
\( \phi \) 6 mm (#2)
MPa ksi Number of bars \( \rho_{sl} \) Spacing \( \rho_{st} \)
mm in
1 20.68 3 4 0.011 140 5.50 0.004
2 55.16 8 4 0.011 140 5.50 0.004
3 20.68 3 4 0.011 80 3.15 0.0064
4 20.68 3 12 0.027 140 5.50 0.004
  1. aEach group contains, in addition to the unwrapped column, the eight columns in Fig. 2.