Dynamic Behavior of Hybrid Framed Arch Railway Bridge under Moving Trains

Abstract

In this study, the dynamic behavior of a concrete-filled steel tube (CFST) hybrid framed arch railway bridge under moving trains are investigated through an in-site dynamic test. The bridge was tested under train loadings in different scenarios and at different speeds of the trains. The free vibration characteristics, strain, displacement, and acceleration of the bridge structure were measured to evaluate the dynamic responses of the train-bridge coupling system. A three-dimensional finite element model, which took into account the train-bridge coupling and track irregularities, was established to analyze the behaviors of the train-bridge system. The model was validated against the in situ test results. The impact effect on the girder was greater than that of the arch frame. The acceleration responses of the trains on the bridge increased with the train's speed. The riding comfort of the trains was evaluated based on the measured dynamic responses of trains.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

INSPIRE - University Transportation Center

Comments

The research was funded by the National Natural Science Foundation of China (Grant Number 51878563), the Sichuan Science and Technology Program (Grant Numbers. 2018JY0294 and 2018JY0549), and the Science and Technology Research and Development Plan of China Railway Construction (Grant No. 2014-C34).

Keywords and Phrases

Dynamic Response; Finite Element Model; Hybrid Framed Arch Bridge; Impact Effect; In-Site Dynamic Test; Riding Comfort

International Standard Serial Number (ISSN)

1573-2479; 1744-8980

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Taylor & Francis Ltd., All rights reserved.

Publication Date

01 Aug 2019

Link to Full Text

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