The Comprehensive Assessment Method of Concrete Damage after Disastrous Fire Based on Game Theory-Normal Cloud Model

Table 1

The correspondence between assessment grades and damage state, plus maintenance measures.

Grades	Damage state and maintenance measures
I	Minor, not directly burned, the structural material and performance are uncompromised; no measures need to be taken.
II	Mild, the structural material and performance are compromised slightly; only measures to improve durability need to be taken.
III	Moderate, the structural material and performance are obviously compromised, but the structural safety is not compromised. Measures for improving durability and local processing, as well as appearance restoration measures, need to be taken immediately.
IV	Serious, although not yet destroyed; the structural material and performance are obviously compromised, and clear deformations or cracks appear. Damage adversely affects structural safety or normal working conditions, and reinforcement and local replacement measures should be taken.
V	Destroyed, structure or member collapse during or after the fire; structure is seriously burned, deformed, and cracked. The structure loses or mostly loses bearing capacity, and structural safety is imperiled, as well as safety support. Thorough reinforcement and replacement measures should be taken immediately.