Research Article
Structural Health Monitoring of Precast Concrete Box Girders Using Selected Vibration-Based Damage Detection Methods
Table 1
Comparison of FE and experimental natural frequencies and mode shapes for the undamaged system.
| Parameter | Mode | 1 (flexural) | 2 (flexural) | 3 (torsional) | 4 (flexural) |
| Natural Frequencies (Hz) | | | | | Experimental model | 7.61 | 26.3 | 31.7 | 57.9 | Finite element model | 7.58 | 27.23 | 36.46 | 58.95 | Relative error (%) | 0.4 | 3.5 | 15.0 | 1.8 |
| Modal Assurance Criteria: | 0.9999 | 0.9967 | 0.9882 | 0.9865 |
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