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