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Table 3 Reduction factors of strength, deformation and damping ratio, (Ito et al. 2015).

From: Experimental Quantification on the Residual Seismic Capacity of Damaged RC Column Members

Damage level

Flexural member

Shear member

\( \eta_{s} \)

\( \eta_{d} \)

\( \eta_{h} \)

\( \eta_{s} \)

\( \eta_{d} \)

\( \eta_{h} \)

I

1

1

0.95

1

1

0.9

II

1

0.95

0.8

1

0.85

0.7

III

1

0.85

0.75

1

0.75

0.6

IV

0.6

0.75

0.7

0.4

0.7

0.5

V

0

0

0

0

0

0

  1. ηs is the reduction factor of strength; ηd is the reduction factor of deformation; ηh is the reduction of damping ratio.