Measurement and Analysis of TMD Pedestrian-Induced Vibration Control of River Crossing Pedestrian Bridge
The dynamic characteristics of a river crossing landscape bridge after installing tuned mass damper(TMD)were tested to obtain the first two vertical vibration frequencies and corresponding vibration modes of the structure.This paper conducted on-site testing and analysis of pedestrian-induced vibration comfort under multiple working conditions.The results show that under ambient excitation,the measured natural frequency of the structure is larger than the theoretical value,and the first two vertical vibration modes are consistent with the theoretical results.Taking into account the natural frequency,mode characteristics,and pedestrian conventional step frequency of the structure,the designed distributed TMD can effectively suppress the vertical vibration of key parts of the bridge structure.Compared with the theoretical value,the vibration reduction efficiency of TMD is about 50%.In the design and testing of pedestrian-induced vibration reduction for pedestrian bridges,attention should be paid to the excitation and vibration reduction control of high-order vibration modes by pedestrian loads.
pedestrian bridgetuned mass damper(TMD)pedestrian-induced vibrationon-site testvibration control
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