Open Access

ARTICLE

Dynamic Performance of Straddle Monorail Curved Girder Bridge

Yan Zhou^1,*, Kai Zhang², Feng Miao³, Pengfei Yang¹

1 Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin, 300384, China
2 Tianjin Municipal Engineering Design & Research Institute Co., Ltd., Tianjin, 300051, China
3 Dalian University, Dalian, 116622, China

* Corresponding Author: Yan Zhou. Email:

(This article belongs to the Special Issue: Computer Modelling in Disaster Prevention and Mitigation for Engineering Structures)

Computer Modeling in Engineering & Sciences 2022, 130(3), 1669-1682. https://doi.org/10.32604/cmes.2022.018101

Received 29 June 2021; Accepted 13 September 2021; Issue published 30 December 2021

Abstract

In this work, a monorail vehicle-bridge coupling (VBC) model capable of accurately considering curve alignment and superelevation is established based on curvilinear moving coordinate system, to study the VBC vibration of straddle monorail curved girder bridge and the relevant factors influencing VBC. While taking Chongqing Jiao Xin line as an example, the VBC program is compiled using Fortran, where the reliability of algorithm and program is verified by the results of Chongqing monorail test. Moreover, the effects of curve radius, vehicle speed, and track irregularity on the corresponding vehicle and bridge vibrations are compared and analyzed. It is observed that the test results of lateral vibration acceleration (LVA) and vertical vibration acceleration (VVA) of track beam, and LVA of vehicle, are consistent with the simulation results. Owing to the track irregularity, vibration of track beam and vehicle increases significantly. Besides, an increase in vehicle speed gradually increases the vibration of track beam and vehicle. For the curve radius (R) ≤ 200 m, lateral and vertical vibrations of the track beam and vehicle decrease significantly with an increasing curve radius. Alternatively, when 200 m < R < 600 m, the lateral vibration of the track beam and vehicle decreases slowly with an increasing curve radius, while the relevant vertical vibration remains stable. Similarly, when R ≥ 600 m, the lateral and vertical vibrations of the track beam and vehicle tend to be stable. Accordingly, the results presented here can provide a strong reference for the design, construction, and safety assessment of existing bridges.

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Keywords

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