ABSTRACT
Tuned Mass Damper (TMD) is widely utilized for vibration control in bridge due to its exceptional damping effectiveness. However, its performance may gradually deteriorate over time. Hence, the reassessment of TMD performance is necessary. This study focuses on TMDs equipped in the Chong Qi Bridge in China. By analyzing the health monitoring data, the dynamic characteristic parameters of the main girder were derived, and the correlation between wind speed and acceleration was studied. On-site random vibration tests were conducted by locking or activating each TMD to investigate the overall bridge vibration during the test process. Based on the test data, the influence of TMDs on the damping ratio of the entire bridge was analyzed, and a new indicator was proposed to quantitatively evaluate the working performance of TMDs. Free vibration tests were performed on TMDs, and the frequency and damping ratio were measured using a self-developed mobile app.
