Research Article
Finite Element Model Updating of Steel Arch Bridge Based on First-Order Mode Test Data
Table 2
Comparison of first-order mode shapes of before and after updating with the measuring value.
| Measuring points | Measuring value | Before updating | After updating | Vibration mode | Vibration mode | Difference | Vibration mode | Difference |
| 3 | −0.243 | −0.421 | 0.178 | −0.340 | 0.097 | 4 | −0.654 | −0.877 | 0.223 | −0.766 | 0.112 | 5 | −1.000 | −1.000 | 0.000 | −1.000 | 0.000 | 6 | −0.608 | −0.660 | 0.052 | −0.696 | 0.088 | 7 | −0.065 | 0.000 | 0.065 | 0.016 | 0.081 | 8 | 0.553 | 0.660 | 0.107 | 0.650 | 0.097 | 9 | 0.917 | 1.000 | 0.083 | 0.918 | 0.001 | 10 | 0.571 | 0.877 | 0.306 | 0.768 | 0.197 | 11 | 0.247 | 0.421 | 0.174 | 0.357 | 0.110 |
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Note. The vibration mode has been normalized. Nodes 1 and 13 are fixed ends, and their vibration mode value is 0, which is not listed in Table 2. |