Research Article
Life-Cycle Management Strategy on Steel Girders in Bridges
Table 5
Statistical parameters of random variables for the illustrative example.
| Parameters | Materials | Variables | Mean () | C.O.V. () | Distribution | Sources |
| Corrosion deterioration rate | Carbon steel | A | 70.6 m | 0.66 | LN | [5, 6] | B | 0.789 | 0.49 | | −0.31 | — | — | Weathering steel | A | 40.2 m | 0.22 | LN | B | 0.557 | 0.10 | | −0.45 | — | — | Corrosion Initiation | — | | 15 yr | 0.30 | LN |
[7] | Repaint duration | — | T
REP | 20 yr | 0.25 | Initial crack dimension | Structural steel | | 0.762 mm | 0.5 | LN |
[14] | Crack growth constant | C | | 0.63 | Crack growth exponent | m | 3 | — | Constant |
[15] | Critical crack dimension | | 0.0254 m | Fracture toughness | | 43.97 MPa m0.5 | 0.19 | TN | [10] | Compressive strength | Concrete | | 21 MPa | 0.19 | LN |
[9] | Yield stress | Steel | | 248 MPa | 0.10 | Modulus of elasticity | Concrete | | 30,000 MPa | 0.20 | LN |
[16] | Steel | | 210,000 MPa | 0.06 | Deck slab thickness | Concrete | | 191 mm | 0.20 | N | [14] |
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C.O.V.: coefficient of variation. LN: lognormal distribution. TN: truncated normal distribution. N: normal distribution.
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