Research Article
Strain-Based Evaluation of a Steel Through-Girder Railroad Bridge
Table 6
Palmgren-Miner’s sums based on measured and simulated strains.
| | | Miner’s sums | Difference from measured (%) | | | Measured | Model 1 | Model 2 | Model 3 | Model 4 | Model 1 | Model 2 | Model 3 | Model 4 | | | (*) | (*) | (*) | (*) | (*) | | | | |
| | Train 1 | | | | | | | | | | | G1B3 midspan | 1.27 | 2.26 | 2.32 | 2.26 | 2.31 | 78% | 83% | 78% | 82% | | G2B6 midspan | 2.48 | 4.10 | 4.19 | 4.11 | 4.18 | 65% | 69% | 66% | 68% | | FB1 midspan | 4.14 | 53.7 | 2.7 | 51.0 | 2.96 | 1196% | −34% | 1131% | −29% | | FB7 midspan | 5.38 | 26.2 | 24 | 22.6 | 26.1 | 387% | 348% | 319% | 385% | | S2B6 midspan | 1.30 | 17.0 | 8.51 | 3.11 | 1.99 | 1205% | 555% | 139% | 53% | | S4B6 midspan | 2.72 | 17.0 | 7.93 | 1.43 | 0.85 | 524% | 192% | −47% | −69% |
| | Train 2 | | | | | | | | | | | G1B3 midspan | 2.47 | 4.62 | 4.58 | 4.52 | 4.55 | 87% | 86% | 83% | 84% | | G2B6 midspan | 4.09 | 7.95 | 7.92 | 7.81 | 7.90 | 94% | 94% | 91% | 93% | | FB1 midspan | 10.4 | 152 | 8.1 | 150 | 8.86 | 1369% | −22% | 1349% | −15% | | FB7 midspan | 12.3 | 80.1 | 66 | 64.2 | 67.6 | 551% | 434% | 422% | 450% | | S2B6 midspan | 3.87 | 50.8 | 29.9 | 9.51 | 7.32 | 1211% | 674% | 146% | 89% | | S4B6 midspan | 7.68 | 50.8 | 27.1 | 4.36 | 3.13 | 560% | 253% | −43% | −59% |
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*G1B3 indicates girder G1 in Bay B3; G2B6 indicates girder G2 in Bay B6; S2B6 and S4B6 indicate stringers S2 and S4, respectively, in Bay B6.
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