Wind Drag Coefficients for Highway Signs and Support Structures (2023) / Chapter Skim
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1 Wind Drag Coefficients for Highway Signs and Support Structures Overview The main objective of this research is to develop comprehensive methods for estimating wind loads and the associated drag coefficients for highway signs and overhead support structures for inclusion in the AASHTO Load and Resistance Factor Design Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals (LRFDLTS-1)
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2 Wind Drag Coefficients for Highway Signs and Support Structures Research Approach The research approach is based on performing three-dimensional (3-D) numerical simulations of the airflow past highway signs and their support structures (e.g., trusses, monotubes)
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Summary 3 the height of the sign, especially in cases when the top of the sign extends above the top of the barrier rail or separation rail. This outcome is observed both when the wind is oriented toward the front face of the sign and when the wind is oriented toward the back face of the sign.
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4 Wind Drag Coefficients for Highway Signs and Support Structures these factors are given as a function of the main geometrical variables. A method is also proposed to estimate wind loads on the relevant subzones of highway signs placed on a grade separation structure when the incoming wind direction is oriented toward the front face or the back face of the sign.
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Summary 5 structure members influences the drag coefficient for each sign. Such information is not available from previous studies.
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