Test and Simulation of Pedestrian-induced Vibrations in a Double-arch Footbridge with Curved Girder

This article carries out the dynamic tests and analyses based on a special-shaped footbridge of Guangzhou Science City. The experiment of pedestrians crossing the footbridge contains these cases: a pedestrian crossing the footbridge at different speeds, several pedestrians in line crossing the footbridge at a specific speed. After comparison, the FEA calculate results are quite close to the measured responses of the footbridge. It shows that the response of the footbridge is increased by the foot frequency. It also finds that, when the foot frequency is higher than 3Hz, the vertical vibration of left span and right span goes opposite phase. The lateral vibration of left span and right span affect each other a lot. The higher foot frequency is, the more obvious it becomes. The forced vibration frequency of the footbridge is closed to the exciting frequency while the resonance doesn’t occur.