Dynamic Responses of Continuous Girder Bridges with Uniform Cross-Section under Moving Vehicular Loads

Gao, Qingji; Wang, Zonglin; Jia, Hongyu; Liu, Chenguang; Li, Jun; Guo, Binqiang; Zhong, Junfei

doi:10.1155/2015/951502

Cited by 3 publications

(2 citation statements)

References 29 publications

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Section: Evaluation Of the Bridge Girders' Train Responsesmentioning

confidence: 99%

“…Figure 10a shows the strain measurements and filter data of the mid span of passage direction with a train speed of 406 km/h. Therefore, the dynamic increment factor (DF) can be calculated as follows [22,23]: ( 2) where A dyn and A stc are the maximum absolute of dynamic and static amplitude of the strain, as shown in Figure 10a. The dynamic factors of passage (P) and opposite (O) directions for the monitored points are illustrated in Figure 10b.…”

Section: Evaluation Of the Bridge Girders' Train Responsesmentioning

confidence: 99%

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Evaluation of High-Speed Railway Bridges Based on a Nondestructive Monitoring System

Kaloop

Elbeltagi

2016

Applied Sciences

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Abstract:Recently, trains' velocities in Korea increased more than the speed used in the design of some bridges. Accordingly, this paper demonstrates the evaluation of a railway bridge due to high-speed trains' movement. A nondestructive monitoring system is used to assess the bridge performance under train speeds of 290, 360, 400 and 406 km/h. This system is comprised of a wireless short-term acceleration system and strain monitoring sensors attached to the bridge girder. The results of the analytical methods in time and frequency domains are presented. The following conclusions are obtained: the cross-correlation models for accelerations and strain measurements are effective to predict the performance of the bridge; the static behavior is increased with train speed developments; and the vibration, torsion, fatigue and frequency contents analyses of the bridge show that the bridge is safe under applied trains' speeds.

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Section: Evaluation Of the Bridge Girders' Train Responsesmentioning

confidence: 99%

Section: Evaluation Of the Bridge Girders' Train Responsesmentioning

confidence: 99%

Evaluation of High-Speed Railway Bridges Based on a Nondestructive Monitoring System

Kaloop

Elbeltagi

2016

Applied Sciences

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Frequency Identification of Equal-Span Continuous Girder Bridge Based on Moving Vehicle Responses

Luo,

Li,

Wang

et al. 2024

Int. J. Str. Stab. Dyn.

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The indirect method for bridge modal identification based on the response of moving vehicles has attracted widespread attention in recent years. However, most existing studies only focus on the simply supported bridge, while continuous girder bridges are widely used in practical engineering. Therefore, this study proposes an indirect frequency identification method for continuous girder bridges. First, the mode shape formula of the equal-span continuous beam is deduced using the three-moment equations, and the analytical solution of the vehicle vibration response is deduced via the vehicle–bridge coupled vibration theory. Second, the derived analytical solution is verified through numerical analysis results and field test results. Finally, the effects of bridge and vehicle parameters on the frequency identification accuracy are analyzed. The results show that a reasonable frequency of the trailer should be selected to avoid the resonance between the vehicle and the bridge for better performance. The research findings can provide a reference for the indirect identification of continuous girder bridges based on the response of moving vehicles.

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Coupled Dynamics of Vehicle‐Bridge Interaction System Using High Efficiency Method

Sun

Zhao

2021

Advances in Civil Engineering

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Vehicle-bridge interaction is the core for a variety of applications, including vehicle vibration, bridge vibration, bridge structural health monitoring, weight-in-motion, bridge condition inspection, and load rating. These applications give rise to a great interest in pursuing a high-efficiency method that can tackle intensive computation in the context of vehicle-bridge interaction. This paper studies the accuracy and efficiency of discretizing the beam in space as lumped masses using the flexibility method and as finite elements using the stiffness method. Computational complexity analysis is carried out along with a numerical case study to compare the accuracy and efficiency of both methods against the analytical solutions. It is found that both methods result in a similar level of accuracy, but the flexibility method overperforms the stiffness method in terms of computational efficiency. This high efficiency algorithm and corresponding discretization schema are applied to study the dynamics of vehicle-bridge interaction. A system of coupled equations is solved directly for a simply supported single-span bridge and a four-degree-of-freedom vehicle modeling. Pavement roughness significantly influences dynamic load coefficient, suggesting preventative maintenance or timely maintenance of pavement surface on a bridge, to reduce pavement roughness, is of significant importance for bridge’s longevity and life-cycle cost benefit. For class A and B level pavement roughness, the dynamic load coefficient is simulated within 2.0, compatible with specifications of AASHTO standard, Australian standard, and Switzerland standard. However, the Chinese code underestimates the dynamic load coefficient for a bridge with a fundamental frequency of around 4 Hz. The proposed method is applicable to different types of bridges as well as train-bridge interaction.

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Dynamic Responses of Continuous Girder Bridges with Uniform Cross-Section under Moving Vehicular Loads

Cited by 3 publications

References 29 publications

Evaluation of High-Speed Railway Bridges Based on a Nondestructive Monitoring System

Evaluation of High-Speed Railway Bridges Based on a Nondestructive Monitoring System

Frequency Identification of Equal-Span Continuous Girder Bridge Based on Moving Vehicle Responses

Coupled Dynamics of Vehicle‐Bridge Interaction System Using High Efficiency Method

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