Vehicle Effect on Vortex-induced Vibration of Flat Steel Box Girder

Yang, Yang; Liang, Zhang Liang; Wu, Bo; Xin, Ling

doi:10.2174/1874149501610010012

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Most of the research in the vehicle-bridge system is aimed at two aspects. On the one hand, the vehicle-bridge dynamic coupling system effects bridge vibration subjected to cyclic loadings due to the coupled vibration excited by vehicles, with considering severe weather [2][3][4][5][6][7][8]. On the other hand, it effects vehicle vibration, including comfort ability for the driver.…”

Section: Introductionmentioning

confidence: 99%

Safety Prediction Using Vehicle Safety Evaluation Model Passing on Long‐Span Bridge with Fully Connected Neural Network

Yang

et al. 2019

Advances in Civil Engineering

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The safety condition of vehicles passing on long-span bridges has attracted more and more attention in recent years. Many research studies have been done to find convenience and efficiency measures. A vehicle safety evaluation model passing on a long-span bridge is presented in this paper based on fully connected neural network (FCN). The first step is to investigate the long-span bridge responses with wind excitation by using the wind tunnel test and finite element model. Subsequently, typical vehicle models are given and a vehicle-bridge system is established by considering weather conditions. Accident types of vehicles with severe weather are estimated. In particular, the input and output variables of the vehicle safety evaluation model are determined, and simultaneously training, validation, and testing data are achieved. Twenty-nine models have been compared and analyzed by using hidden layer, initial learning rate, batch size, activation function, and optimization method. It is found that the 4-15-15-4 model occupies a preferable prediction performance, and it can provide a kind of utility for traffic control and reduce the probability of vehicle accidents on the bridge.

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Section: Introductionmentioning

confidence: 99%

Safety Prediction Using Vehicle Safety Evaluation Model Passing on Long‐Span Bridge with Fully Connected Neural Network

Yang

et al. 2019

Advances in Civil Engineering

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“…Neglecting the effect of the boundary layer, the experiment is performed in a uniform flow. And in practice, this effect in wind tunnel is more severe than that of the actual condition because the side force under this condition is larger than that of the real [15]. Test of static force coefficients in wind tunnel is shown in Fig.…”

Section: Test Setup and Specimenmentioning

confidence: 95%

Aerodynamic Admittance Research on Wide-body Flat Steel Box Girder

Liu¹,

Zhang²,

Wu³

et al. 2016

TOCIEJ

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Aerodynamic admittance is a key parameter affecting the analysis accuracy of the bridge buffeting response. However, few articles have covered the issue of the wide-body flat box girder with much smaller depth-width ratio (such as 1/12 studied in this paper). Therefore, to explore the real buffeting force of the wide-body flat box girder, experiments of the static force coefficients and aerodynamic admittance are carried out in wind tunnel. Wooden segmental model has a scale ratio of 1/60 to an actual 42 m wide suspension bridge girder. Using the high-frequency-force-balance (HFFB) equipment fixed with the segmental model under the conditions of different wind speeds and different wind attack angles, wind power spectrums of the buffeting force are measured and the variation of aerodynamic admittance parameters is analyzed. The results show that the aerodynamic admittance of the box girder measured in the experiment with this so much smaller depth-width ratio differs from the corresponding classical Sears expression. Some inspiration can be presented for the future study of the buffeting response for this kind of much wider bridge with the similar ratio in this paper.

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“…Exhibiting economical effectiveness, the flat box girder is widely used in long-span suspension bridges [1], [2], [3]. Previous studies showed that this kind of bridges is susceptible to both stationary and non-stationary forces, especially for turbulent wind loads [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Accessory Attachment on Static Coefficients in a Steel Box Girder for Long - Span Suspension Bridges

Liu¹,

Zhang²,

Wu³

et al. 2017

JESTR

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Steel box girders are widely used in long-span suspension bridges nowadays, and static coefficients (drag coefficient, lift coefficient and moment coefficient) are the important parameters in analyzing the aerodynamic stability of bridge girders. A case study of Cuntan Yangtze Suspension Bridge was conducted to study the influence of accessory attachment in steel box girders on their static coefficients. Wind environment was initially measured in site, and then wind tunnel tests of the girder sectional model were performed according to the field measurement. Static coefficients were further calculated by computational fluid dynamics (CFD). In experiments and simulations, the effect of accessory attachment about guard rail ventilation rate and overhaul-dolly rail location on these coefficients was investigated. CFD results were then compared with wind tunnel tests. Results show that even minimal change in this accessory attachment significantly affects the flow distributions. Accordingly, both drag coefficient and lift coefficient are markedly affected within the variation range of about ±30%, whereas the moment coefficient is basically not influenced, with the maximum amplitude of variations of <2%. These data can provide consolidated experimental and numerical simulation basis for future fine aerodynamic analysis and wind-resistance design of such bridge decks.

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Vehicle Effect on Vortex-induced Vibration of Flat Steel Box Girder

Cited by 6 publications

References 9 publications

Safety Prediction Using Vehicle Safety Evaluation Model Passing on Long‐Span Bridge with Fully Connected Neural Network

Safety Prediction Using Vehicle Safety Evaluation Model Passing on Long‐Span Bridge with Fully Connected Neural Network

Aerodynamic Admittance Research on Wide-body Flat Steel Box Girder

Effect of Accessory Attachment on Static Coefficients in a Steel Box Girder for Long - Span Suspension Bridges

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