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

Figure 12

Comparison of amplitudes at mid-span (vertical acceleration) between in situ measurements and the analytical model: 1 person walking at various speeds (steel box-girder structure). Red circles: analytical model; blue squares; in situ measurements; vertical line at 2.2 Hz separates “walk” from “running.”