DEFLECTION CRITERIA FOR WIND INDUCED VIBRATIONS IN CANTILEVER HIGHWAY SIGN STRUCTURES
This study considers the vibratory characteristics of cantilever highway sign structures. During the course of the study four structures were instrumented to experimentally determine their vibration characteristics. In addition analytical studies were performed using finite element techniques. The analysis considers several types of wind loading on the structure. It was found from both the experimental and analytical work that flow induced vibration due to vehicular movement under the sign structure and also vibration due to vortex shedding from the structural elements does not result in stress levels which could be damaging to the structure. However the analysis did show that high stress levels can be expected in these structures under severe wind conditions (v = 100 mph). Experimental validation of the analytical results for this condition was not obtained. (FHWA)
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Corporate Authors:
North Carolina State University, Raleigh
Center for Transportation Engineering Studies, P.O. Box 7908
Raleigh, NC United States 27695North Carolina Department of Administration
116 W Jones Street
Raleigh, NC United States 27603Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Edwards, J A
- Bingham, W L
- Publication Date: 1984-9
Media Info
- Pagination: 124 p.
Subject/Index Terms
- TRT Terms: Cantilevers; Deflection; Design; Finite element method; Sign supports; Signs; Stresses; Traffic signs; Vibration; Wind
- Uncontrolled Terms: Design criteria
- Old TRIS Terms: Sign structures
- Subject Areas: Bridges and other structures; Design; Highways; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure;
Filing Info
- Accession Number: 00392205
- Record Type: Publication
- Report/Paper Numbers: FHWA-NC-84-001 Final Rpt.
- Files: TRIS, ATRI, USDOT
- Created Date: Feb 28 1985 12:00AM