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

Table 8

Peak acceleration amplitudes for different tests.

Walking load	𝑎max (mg)
	Vertical	Longitudinal	Transversal
1 Person*—walk at 𝑓=2.0 Hz	7.3	1.7	2.9
1 Person*—walk at 𝑓=2.2 Hz	10.1	1.8	3.1
1 Person*—walk at 𝑓=2.5 Hz	8.3	4.9	8.0
1 Person*—walk at 𝑓=2.6 Hz	11.6	12.2	13.5
1 Person*—walk at 𝑓=3.0 Hz	15.5	7.8	15.8
1 Person*—walk at 𝑓=3.7 Hz	32.7	11.8	25.4^†
2 Jumps at mid-span	61.1	34.2^†	90.2^†
Impulse in transversal direction	8.5	5.2	15.6

∗74 kg.
^†Values exceeding the code limits for horizontal vibration (20 mg). EN-1990 [20]).