Wind Drag Coefficients for Octagonal Cylinders

Mehta, Kishor C.; Ritchie, David L.; Oler, Walt

i

Wind Drag Coefficients for Octagonal Cylinders

1990-03-01
By Mehta, Kishor C. ; Ritchie, David L. ; Oler, Walt

File Language:

English

Details

Creators:

Mehta, Kishor C. ; Ritchie, David L. ; Oler, Walt
Corporate Creators:

Texas Tech University
Corporate Contributors:

Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Aerodynamic Force Coefficients Cross Sections Design Drag Drag Coefficients Luminaires Octagonal Signals Sign Supports Structural Supports Tow Tank Wind
Publication/ Report Number:

FWHA/TX-90
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report
Corporate Publisher:

Texas Tech University. College of Engineering
Abstract:

Highway signs, luminaires, and traffic signal structures are exposed to wind loads throughout their lives. The design of the cross section, thus the amount of material and method of fabrication, very often is controlled by wind loads. Improved definitions of wind loads using drag coefficients make luminaires not only more economical but also more reliable. The Texas Department of Highways and Public Transportation sponsored a research project at Texas Tech University to determine drag coefficients for octagonal shaped luminaire supports. The research used the tow tank of the Mechanical Engineering Dept. at Texas Tech University for the experimental work. The experimental technique was verified using published data for circular cylinders. One of the innovations in the project was the use of actual industry manufactured luminaire poles as test specimens. These specimens matched the surface roughness and the geometric parameters of field poles. Drag coefficient values obtained in this project are about 25% higher than the ones currently specified in the AASHTO standard.
Format:

PDF
Funding:

11-5-89 -1207
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:1ec134cae052576a0eed004cff4fc20932c247e14a626e5cbc03e47f15435e85f6adad3c97435e61ddbb814ece7821ed220866a85b56bae3fad38d926fdc1d77
Download URL:

https://rosap.ntl.bts.gov/view/dot/86447/dot_86447_DS1.pdf
File Type:

[PDF - 2.38 MB ]

File Language:

English

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