Wind Loads on Overhead Sign Structures: A Comparative Study

Wind Loads on Overhead Sign Structures: A Comparative Study

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Road signs are prone to extreme winds that cause significant damage.Overhead sign structures can disrupt traffic and cause harm to the traveling public if a failure occurs under Hitting Strip extreme wind conditions.In this paper, we employ Computational Fluid Dynamics (CFD) in a comparative study to understand the aerodynamics of standard, porous, and curved signs.

The study shows the viability of porous and curved overhead boards for lessening aerodynamic loads, which can mini-mize damage and enhance safety on roadways.Porous overhead signs can decrease the drag forces; however, the size of the openings is a vital parameter in reducing wind loads.Small and uniform perforations lead to higher Computer drag forces, compared to larger ones, under the same porosity ratio.

Introducing porosity to a solid panel moves the vorticity region further downstream, reducing the magnitude of pressures on the leeward side and decreasing the drag force.However, curved panels further enhanced the force reduction.