A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Operational Post Deformation of Cantilever Sign Support Structures from Truck-Induced Wind Gusts
The application of operational modal analysis using frequency domain decomposition revealed the operational behavior of a cantilever sign support structure in response to truck-induced wind gusts. The study identified the modes of vibration that contribute to the total deformation of the structure during service. The research involved experimentation of an on-site cantilever sign support structure under a controlled test regime of truck gusts. The study measured normal- and shear-strain deformations around the circumference of the post in proximity to the base-plate weld. The results indicated a multiple-degrees-of-freedom dynamic system with two equally contributing modes of vibration. The modes resembled torsional and flexural vibrations about the post. The resulting operational deflected shape had a distinctive beating vibration response due to the modal contributions. The truck fatigue loading provisions of the AASHTO supports specifications were overly conservative for the tested structure and truck type.
Operational Post Deformation of Cantilever Sign Support Structures from Truck-Induced Wind Gusts
The application of operational modal analysis using frequency domain decomposition revealed the operational behavior of a cantilever sign support structure in response to truck-induced wind gusts. The study identified the modes of vibration that contribute to the total deformation of the structure during service. The research involved experimentation of an on-site cantilever sign support structure under a controlled test regime of truck gusts. The study measured normal- and shear-strain deformations around the circumference of the post in proximity to the base-plate weld. The results indicated a multiple-degrees-of-freedom dynamic system with two equally contributing modes of vibration. The modes resembled torsional and flexural vibrations about the post. The resulting operational deflected shape had a distinctive beating vibration response due to the modal contributions. The truck fatigue loading provisions of the AASHTO supports specifications were overly conservative for the tested structure and truck type.
Operational Post Deformation of Cantilever Sign Support Structures from Truck-Induced Wind Gusts
Hosch, Ian E. (author) / Fouad, Fouad H. (author) / Gallow, Mohammed (author) / Traylor, Lonny (author)
2017-12-13
Article (Journal)
Electronic Resource
Unknown
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