Running Cars Induced Wind Loads on Sound Barrier of Elevated Roads

Wang, Dalei; Zheng, Liang; Chen, Ai Rong

doi:10.4028/www.scientific.net/amr.378-379.137

Cited by 3 publications

(2 citation statements)

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“…This method is unsuitable for long‐term VIAL monitoring due to two main disadvantages: (a) inconvenient to implement and (b) difficult to determine stochastic traffic conditions. The third one is numerical simulation method, which is widely used in researches on VIAL and TIAL . It can fully simulate a specified vehicle running process.…”

Section: Introductionmentioning

confidence: 99%

A novel computer vision-based monitoring methodology for vehicle-induced aerodynamic load on noise barrier

Pan

Wang

Shen

et al. 2018

Struct Control Health Monit

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Due to the absence of antifatigue design under vehicle-induced aerodynamic load (VIAL) during the process of structural design, structural failures of noise barriers erected on urban highway viaducts have become a common issue in China. In this paper, a novel VIAL monitoring methodology is proposed, which can achieve a remote VIAL measuring only by analysis and application of the data from a traffic-monitoring camera. To establish this methodology, a VIAL determinative model and a computer vision system for measuring the vehicle running characteristics are developed. The accuracy and reliability of this methodology have been validated by a field experiment. By comparing with the results of vehicle-induced aerodynamic pressure (VIAP) from a sensor-based wind pressure acquisition system, it was found that the systemic root mean square deviations of maximum and minimum values of VIAP were 12.13% and 10.10%, respectively. KEYWORDS computer vision, noise barrier, numerical simulation, vehicle identification, vehicle-induced aerodynamic load (VIAL) Struct Control Health Monit. 2018;25:e2271.wileyonlinelibrary.com/journal/stc

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Section: Introductionmentioning

confidence: 99%

A novel computer vision-based monitoring methodology for vehicle-induced aerodynamic load on noise barrier

Pan

Wang

Shen

et al. 2018

Struct Control Health Monit

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“…To explore the influence of the process of train passing on the sound barrier, numerous studies about impulsive wind pressure have been conducted [2][3][4][5][6][7]. To obtain the time histories of pressure and vehicle aerodynamics, Hermanns et al applied various implementations of the direct boundary element method (BEM) to solve the Laplace equation, which governs the flow field around the power car of high-speed trains in an approximate manner [2].…”

Section: Introductionmentioning

confidence: 99%

In Situ Measurement of Wind-Induced Pulse Response of Sound Barrier Based on High-Speed Imaging Technology

Zhu

Guo

Zhang

et al. 2016

Mathematical Problems in Engineering

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The lifetime of the sound barrier is threatened by high-speed train-induced impulsive wind pressure as it passes by. The vibration response of the sound barrier during the process of train passing is difficult to be measured using conventional measurement methods because of the inconvenience of the installation of markers on the sound barrier. In this paper, the high-speed camera is used to record the whole process of the train passing by the sound barrier. Then, a displacement extraction algorithm based on the theory of Taylor expansion is proposed to obtain the vibration response curve. Compared with the result simulated by using the finite element method, the video extraction result shows the same head wave and tail wave phenomenon, demonstrating that the vibration measurement by using the high-speed imaging technology is an effective measuring way. It can achieve noncontact and remote vibration measurement and has important practical value.

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