Vibration Frequencies Extraction of the Forth Road Bridge Using High Sampling GPS Data

Table 2

Vibration frequencies extracted from longitudinal GPS measurements ( direction of BCS).

Situations	Extracted frequencies (Hz)						Mean wind speed; (km/h)
	Common frequencies					Distinct frequencies
Ambient circulation loading	0.095	0.105	—	0.136	0.149	0.108, 0.117, 0.161	31.96
Strong wind (abrupt wind speed change)	0.091	—	0.129	0.134	0.151	0.184, 0.262	12.21
	—	—	0.126	0.134	0.151	0.216	16.46
Two 40 t lorries passing		0.106	0.129	0.131	0.150	0.172, 0.332	13.34