Research Article
Vibration Frequencies Extraction of the Forth Road Bridge Using High Sampling GPS Data
Table 1
Vibration frequencies extracted from lateral GPS measurements (
direction of BCS).
| Situations | Extracted frequencies (Hz) | Mean wind speed (km/h) | Common frequencies | Distinct frequencies |
| Ambient circulation loading | 0.067 | 0.073 | 0.105 | 0.118 | 0.269 | 0.345 | 0.160 | 7.30 |
| Strong wind (abrupt wind speed change) | 0.069 | 0.077 | 0.106 | 0.110 | 0.267 | 0.345 | — | 52.49 | 0.068 | 0.071 | 0.105 | 0.110 | 0.270 | 0.344 | 0.097, 0.101 | 55.83 |
| Two 40 t lorries passing | 0.064 | 0.073 | 0.103 | — | 0.268 | — | 0.132, 0.147 | 44.75 |
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