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ANALYSIS OF OVERHEAD HIGHWAY SIGN STRUCTURES FOR ENHANCED RESILIENCE**

Abstract

Overhead highway signage structures are critical components of transportation infrastructure, exposed to dynamic aerodynamic loads from wind and continuous traffic, leading to potential fatigue cracking. Understanding their vibrational behavior is essential for ensuring enhanced resilience and long-term structural performance. This research investigates the dynamic and vibrational response of these structures through advanced computational methods. The study reviews prior analytical and experimental research work conducted on large-span Variable Message Sign (VMS) truss systems for the Alabama Department of Transportation (ALDOT) and introduces foundational finite element modeling (FEM) of similar structures in Georgia. The study employs Finite Element Analysis (FEA) to perform dynamic analysis to determine natural frequencies and vibration modes, followed by static analysis under wind-induced loading based on AASHTO guidelines. A parametric study varies member sizes and configurations to assess the influence of geometric parameters on structural stiffness and frequency response. The results provide an investigation of the structure's dynamic behavior and operational performance under applied loads. Beyond its technical focus, this project also serves an educational purpose by enriching undergraduate research experiences in structural engineering. It provides students with hands-on exposure to advanced FEA tools and dynamic analysis methods, strengthening their analytical and problem-solving skills while preparing them for graduate studies or professional practice in structural and research-oriented engineering.

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