Fundamental Frequencies of Vibration of Footbridges in Portugal: From In Situ Measurements to Numerical Modelling

Table 3

Amplitude values in mg of the measured maximum motion at mid-span for a group of 10 footbridges in the transverse (T), longitudinal (L), and vertical (V) directions.

Name	Length; (m)	Noise			1 person walk			Jump			Excitation			Typology
		T	L	V	T	L	V	T	L	V	T	L	V
CP_Gago Coutinho	28	0.5	0.5	0.9	2.5	2.5	12				8	5	109	Steel BG
Relógio_Gomes Costa_W	42				6.5	2.5	7	12	6	45	7	3	27	Steel BG
Braga NE	25	1.5	1	7	4	1.4	17	24	9.6	138	19	18	40	Steel truss
Av Gomes Costa (Leste)	30	1.8	2	7	5.2	5.4	32	36	7.1	79	6.7	7.6	97	Steel truss
Rego	46	3.3	1.1	5.5	4.8	1.9	7.5	10.6	10	77	4	8.1	76	Steel truss
Av. EUA_Chelas Leste	25	0.2	0.2	0.2	0.8	1.3	2.8	2.7	1	24				RC
Entreposto Escola_Herc_Carvalho	20										2.6	4	31	RC
Vale Formoso (Chelas)	28	0.5	0.2	0.5	0.6	1	3.5	0.8	0.9	7.5	1.6	1.4	22	RC
Microsoft Porto Salvo	25	2.9	0.9	10.8	11	4.8	3.8	35	9.6	155	24	7.6	90	Other types
CC Vasco Gama Norte	75	1.6		1.9	4		5				5.2		12.5	Other types