Structural vibration control of the curved bridge based on the combined effects of TLMD and LMD

• Published in: Advances in structural engineering Vol. 28; no. 10; pp. 1910 - 1922
• Main Authors: Xia, Qi, Chen, Ze, Yang, Lin, Hou, Jie, Zhang, Jin-bei, Wang, Zheng-xing, Wu, Wang-lin, Ye, Zhi-wei, Tan, Hai-shan
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.07.2025
• Subjects: TLMD; curved bridge; LMD; Vibration control; vehicle-bridge coupling
• ISSN: 1369-4332; 2048-4011
• DOI: 10.1177/13694332251321206

The abnormal vibration of the bridges, particularly those with curved bridges, poses a significant threat to structural safety due to the complex dynamics of vehicle-bridge coupling. This coupling emerges from the generation of centripetal and eccentric forces as moving loads traverse the bridge, leading to intricate interactions that induce unusual vibrations within the structure. The Nanping Curved Bridge (NPCB) in Shenzhen City secrves as a case study, where vertical vibration acceleration can reach up to 1200 mm/s2. The primary research involves: (1) Conducting measurements and analyses of the structural dynamic characteristics both before and after the installation of dampers. (2) Analyzing field test data to reveal that the excitation effects on bridge structures vary depending on the type of vehicle (trucks, cars) and environmental factors. Specific frequency bands for vibration reduction were identified by incorporating finite element analysis results. (3) Innovatively, a combined control strategy of Tuned Liquid-Mass Dampers (TLMDs) and Lever Mass Dampers (LMDs) is proposed to address the challenge of controlling NPCB due to its wide frequency domain distribution. (4) After the installation of the dampers, the corresponding vibration tests were conducted. The analysis results indicated that TLMD and LMD combined operation could reduce bridge vibration by 37.7% and double the damping ratio.