Research Article
Extension Model for Safety Appraisal of Existing Concrete Members Based on an Improved Comprehensive Weighting Method
Table 4
Safety grades and corresponding (normalized) ranges of the five indices.
| Index | Bearing capacity | Deflection/span | Cracks | Reinforcement corrosion | Concrete carbonation depth |
| Level a | 0.667∼1.000 | 0.625∼1.000 | 0.692∼1.000 | 0.700∼1.000 | 0.750∼1.000 | Level b | 0.500∼0.667 | 0.571∼0.625 | 0.462∼0.692 | 0.600∼0.700 | 0.500∼0.750 | Level c | 0.333∼0.500 | 0.400∼0.571 | 0.231∼0.462 | 0.300∼0.600 | 0.250∼0.500 | Level d | 0∼0.333 | 0∼0.400 | 0∼0.231 | 0∼0.300 | 0∼0.250 |
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