Framework of vehicle–bridge–wind dynamic analysis

Cai, C.S.; Chen, Suren

doi:10.1016/j.jweia.2004.03.007

Cited by 201 publications

(83 citation statements)

References 20 publications

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“…Next, modal analysis is carried out to determine the first couple critical modes for dynamic responses of structures. According to critical modes, a reduced-DOF bridge dynamic model is established to calculate the reasonable dynamic response for bridge by adopting only limited modes [30][31][32]. e road surface roughness on the bridge superstructure can be simulated as a stationary Gaussian random process with a zero mean value.…”

Section: Pavement Surface Roughnessmentioning

confidence: 99%

Development of Dynamic Impact Factor Expressions for Skewed Composite Concrete-Steel Slab-On-Girder Bridges

Mohseni

Ashin

Choi

et al. 2018

Advances in Materials Science and Engineering

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In order to take into account the dynamic effects of moving vehicles, bridges are designed to carry static loads that are increased by dynamic impact (IFs) factors (or dynamic amplification factors) that are a function of either the span or the first flexural natural frequency of the bridge. However, this approach tends to produce very conservative designs as the IFs are calculated based on a relatively few general parameters, ignoring many significant bridge and truck dynamic characteristics. is paper presents a method for determining more realistic dynamic impact factors for skewed composite slab-on-girder bridges under AASHTO LRFD truck loading. An extensive parametric study of over 125 bridge prototypes examined key parameters, namely, the number of girders, number of lanes, skew angle, and span length. Based on the data generated by this analysis, appropriate expressions for dynamic impact factors for the longitudinal moment and deflection are proposed. In order to reduce the complexity of proposed expressions, the effects of road surface roughness on dynamic responses of bridge-vehicle interaction are considered in bridge modeling. e findings of this study are expected to help bridge engineers to design composite slab-on-girder bridges more reliably and economically and can also be used to reassess the safe live-load capacity of existing structures, potentially preventing the unnecessary posting or closing of busy highway bridges.

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Section: Pavement Surface Roughnessmentioning

confidence: 99%

Development of Dynamic Impact Factor Expressions for Skewed Composite Concrete-Steel Slab-On-Girder Bridges

Mohseni

Ashin

Choi

et al. 2018

Advances in Materials Science and Engineering

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“…Macdonald [3] studied the response to wind and traffic load of the Clifton Bridge, which is a relatively shortspan suspension bridge crossing a narrow gorge. Cai [4] proposed a detailed analytical model to study both wind and traffic induced vibrations of a long span bridge, but no detailed measurement campaign of such phenomenon has been found, apart from Macdonald [3]. In Norway, the coastal highway E39 project requires a detailed description of the wind conditions and bridge response in complex topography such as fjords.…”

Section: Introductionmentioning

confidence: 99%

Full scale monitoring of wind and traffic induced response of a suspension bridge

Cheynet

Jakobsen

Snæbjörnsson

2015

MATEC Web of Conferences

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Abstract. This paper presents a full-scale analysis of wind and traffic-induced vibrations of a long-span suspension bridge in complex terrain. Several wind and acceleration sensors have been installed along the main span on Lysefjord Bridge in Norway. In the present study, three days of continuous records are analysed. Traffic-induced vibrations are dominant at low and moderated wind speed, with non-negligible effects on the overall bridge response for heavy vehicles only. Traffic and wind-induced vibrations are compared in terms of root mean square of the acceleration response, and three simples approaches are proposed to isolate records dominated by wind-induced vibration. The first one relies on the separation of nocturnal and diurnal samples. The second one is based on the evaluation of the time-varying root mean square of the acceleration response. The last one evaluates the relative importance of the high frequency domain of the acceleration bridge response. It appears that traffic-induced vibrations may have to be taken into account for the buffeting analysis of longspan bridge under moderated wind.

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“…Xu and Guo (2003b) extended the safety analysis method of vehicles on the ground to a situation in which the vehicles passed through a long-span cable-stayed bridge. Such a problem was also investigated by Cai and Chen (2004). However, in these studies the aerodynamic forces on a vehicle were assumed to be ideally sudden loads without considering the real wake environment of a bridge tower as well as the interference between the vehicle and the bridge tower.…”

Section: Introductionmentioning

confidence: 99%

Crosswind Effect Studies on Road Vehicle Passing by Bridge Tower using Computational Fluid Dynamics

Wang

Zhu

et al. 2014

Engineering Applications of Computational Fluid Mechanics

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When a road vehicle moving on a bridge deck is passing by a bridge tower, the vehicle will be shielded briefly from the crosswind by the bridge tower. This study aimed to apply computational fluid dynamics to explore this special engineering problem for the first time. A stationary vehicle immerged in the wake of a bridge tower was first simulated and compared with wind tunnel test results. By using the dynamic mesh method, the moving of the vehicle passing by a bridge tower was then simulated. The results show that the computed aerodynamic coefficients of the stationary vehicle are generally larger than wind tunnel results. The side force and yawing moment coefficients of the moving vehicle are lower than those of the stationary vehicle. The results also show that the suddenly changing time of aerodynamic forces caused by the tower may be shorter than the average driver reaction time.

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Framework of vehicle–bridge–wind dynamic analysis

Cited by 201 publications

References 20 publications

Development of Dynamic Impact Factor Expressions for Skewed Composite Concrete-Steel Slab-On-Girder Bridges

Development of Dynamic Impact Factor Expressions for Skewed Composite Concrete-Steel Slab-On-Girder Bridges

Full scale monitoring of wind and traffic induced response of a suspension bridge

Crosswind Effect Studies on Road Vehicle Passing by Bridge Tower using Computational Fluid Dynamics

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