Table 1 Definition of damage levels of structural members.

I

Visible narrow cracks on concrete surfaces. Crack widths are less than 0.2 mm

II

Visible cracks on concrete surfaces. Cracks widths range from about 0.2 mm to 1.0 mm

III

Noticeable wide cracks. Cracks widths range from about 1.0 mm to 2.0 mm. Localized crushing of concrete cover

IV

Crack widths are greater than 2 mm. Crushing of concrete with exposed reinforcing bars. Spalling of concrete cover

V

Buckling of reinforcing bars. Crushing of core concrete. Visible vertical deformation in column and/or shear walls. Side-sway, subsidence of upper floors, and/or fracture of reinforcing bars are observed in some cases