Vibration analysis of concrete bridges during a train pass-by using various models. (September 2016)

• Record Type: Journal Article
• Authors: Li, Qi; Wang, Ke; Cheng, Shili; Li, Wuqian; Song, Xiaodong
• Is Part Of: Journal of physics. Volume 744(2016)
• Publication Date: 2016-09
• Subjects: railway bridges -- vibration and noise -- train-track-bridge interaction -- power flow; Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/744/1/012140
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The vibration of a bridge must be determined in order to predict the bridge noise during a train pass-by. It can be generally solved with different models either in the time domain or the frequency domain. The computation cost and accuracy of these models vary a lot in a wide frequency band. This study aims to compare the results obtained from various models for recommending the most suitable model in further noise prediction. First, train-track-bridge models in the time domain are developed by using the finite element method and mode superposition method. The rails are modeled by Timoshenko beam elements and the bridge is respectively modeled by shell elements and volume elements. Second, power flow models for the coupled system are established in the frequency domain. The rails are modelled by infinite Timoshenko beams and the bridge is respectively represented by three finite element models, an infinite Kirchhoff plate, and an infinite Mindlin plate model. The vibration at given locations of the bridge and the power input to the bridges through the rail fasteners are calculated using these models. The results show that the shear deformation of the bridge deck has significant influences on the bridge vibration at medium-to-high frequencies. The Mindlin plate model can be used to represent the U-shaped girder to obtain the power input to the bridge with high accuracy and efficiency.