Damage location diagnosis of urban rail transit bridge based on vehicle-induced vibration responses

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Liu, Hao^1 ; Zuo, Dongliang^1 ; Zhang, Kun^1

School of Civil Engineering, Dalian Jiaotong University, Dalian

116028, China^1

关键词: Acceleration response;    Dynamic time history analysis;    Induced vibrations;    Structural damages;    Urban rail transit;    Vehicle structures;    Vibration amplitude;    Vibration response;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012126/pdf
DOI  :  10.1088/1757-899X/592/1/012126

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

For the urban rail transit bridges, vehicle load has obvious repeatability and regularity, and the vibration amplitude of the bridges under the vehicle action is much larger than that during the period of not being open to traffic, which is more conducive to the appearance of structural damage. This paper attempts to use vehicle-induced vibration responses to diagnose damages for urban rail transit bridges. Firstly, the vehicle-rail-bridge coupling finite element model was established based on the engineering background of a typical urban rail transit bridge. Then, through dynamic time history analysis, the vibration responses of bridge and vehicle before and after damage were obtained. Finally, the sensitivity to damage of acceleration responses from measuring points on both bridge and vehicle was compared, and a damage diagnosis method based on the difference of acceleration responses from different measuring points of bridge and vehicle structure was proposed. The results show that the difference of acceleration response between the measured points of bridge, wheelset and bogie before and after damage can be used to locate damage, and the vehicle-induced vibration data as a medium can provide a new way for rapid diagnosis of damage location for urban rail transit bridges.