Monitoring Wind-Induced Vibrations/Stresses in a High Mast Lighting Tower (TR-518)
Other authors: Byung-lK Chang
Student researcher: Byung-Ik Chang
Start date: 07/01/04
End date: 12/31/05
Sponsor(s):Iowa Department of Transportation
Iowa Highway Research Board
Robert Dexter & Subconsultants
About the research
The objective of this research is to collect long-term behavior information on the performance of one of the eight high-mast lighting towers in the I35/US18 interchange near Clear Lake, IA for the purpose of validating assumptions made by others in an analytical investigation of these and similar towers. The research will consist of three primary tasks. Task 1 will be to design the long-term monitoring system needed to collect the required information. This system will include strain sensors, vibration sensors, wind speed sensors, and video recording equipment. The system will be designed such that data can be collected and transmitted remotely to all interested parties. Task 2 will be to install and maintain the above system for a period of one year. Task 3 will be to determine the natural frequencies and damping characteristics of about nine towers. This will be accomplished by installing a sensor on the towers and then vibrating the pole manually.
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