Abstract
Wind field (e.g., wind speed and wind direction) has the characteristics of randomness, nonlinearity, and uncertainty, which can be critical and even destructive on a long-span bridge’s hangers, such as vortex shedding, galloping, and flutter. Nowadays, the finite element method is widely used for model calculation, such as in long-span bridges and high-rise buildings. In this study, the investigated bridge hanger model was established by COMSOL Multiphysics software, which can calculate fluid dynamics (CFD), solid mechanics, and fluid–solid coupling. Regarding the wind field of bridge hangers, the influence of CFD models, wind speed, and wind direction are investigated. Specifically, the bridge hanger structure has symmetrical characteristics, which can greatly reduce the calculation efficiency. Furthermore, the von Mises stress of bridge hangers is calculated based on fluid–solid coupling.
Highlights
In recent years, the structure of long-span bridges has been softer, and their crossing ability has shown a continuous increase due to the advance in design and construction technologies and the emergence of novel materials [1]
It is important to analyze the impact of long-span bridges under wind fields, which can ensure a reliable wind-resistant design of a bridge [6,7,8,9,10,11,12]
In order to study the impact of long-span bridges under wind fields, computational fluid dynamics [13,14,15,16,17] has been proposed based on structural health monitoring (SHM) data
Summary
The computational fluid dynamics of a bridge are calculated based on the finite element method [24,25,26,27,28,29,30,31]. Regarding the finite element model, the left boundary is the wind speed inlet, the right boundary is the outlet, and the upper and lower boundaries are slip boundaries, which are the same. Regarding the finite element model, the left boundary is the wind speed inlet, the right boundary is the outlet, and the upper and lower boundaries are slip boundaries, which are the same boundary conditions with a wind tunnel test. (a) shows the boundary conditions of of wind onfinite finiteelement element model; model; (b) shows the calculation meshing in the wind field simulation based on the finite element model. Changes a bridge hanger’s windspeed field atisdifferent are direction calculated,iswhich
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