Abstract: To explore the dynamic characteristics of boarding bridge structures and the responses to human-induced excitations, tests were conducted on natural frequencies, damping ratios, and modal shapes of the structure at Xiamen Xiang'an International Airport. Pedestrian-induced acceleration responses of the boarding bridges were evaluated in accordance with domestic and international design specifications for footbridges. The influence of changing walking excitation spatial positions on dynamic responses was examined, and the crowd-induced dynamic responses were tested and analyzed. The results show that the vertical and lateral accelerations as well as damping ratios in multi-person standing case are significantly higher than those in unoccupied and equivalent weight cases. Walking along one side of the bridge deck leads to eccentric loading on the single-row-column boarding bridge, producing additional lateral acceleration responses. Under the lateral force caused by walking, the lateral acceleration at the higher side of the bridge is significantly greater than that at the lower side. Under multi-person synchronous walking excitation, the measured peak lateral acceleration is about half the peak vertical acceleration. Due to the differences between finite element analysis and actual measurement in simulating multi person synchronization, the peak vertical acceleration is greater than the measured value, and the peak lateral acceleration is smaller than the measured value.