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NCHRP 12-111 [Final]
Evaluating the Effectiveness of Vibration-Mitigation Devices for Structural Supports of Signs, Luminaires, and Traffic Signals
| Project Data |
| Funds: |
$400,000 |
| Research Agency: |
University of Connecticut |
| Principal Investigator: |
Richard Christenson |
| Effective Date: |
4/3/2017 |
| Completion Date: |
8/19/2022 |
| Comments: |
Final Contractor's Report is available on the project webpage. |
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Structural supports for signs, luminaires, and traffic signals are typically characterized by high flexibility and low damping, which makes them prone to wind-induced vibration and susceptible to fatigue and structural failure. The use of vibration-mitigation devices could reduce the induced vibration thereby increasing the life of new and existing structures; reducing the costs of new structures; contributing to improved safety for the traveling public; and reducing maintenance, inspection, and repair costs. Although several mitigation devices have been proposed, only a few have been used, primarily due to the absence of test methods for evaluating their effectiveness and implications in the structural design process. Research is needed to develop test procedures for evaluating the effectiveness of these vibration-mitigation devices and considering their effect on the structural design process. Incorporating such procedures into the AASHTO LRFD Specifications for Structural Supports for Signs, Luminaires, and Traffic Signals (AASHTO LRFD SLTS Specifications) would facilitate the use of effective vibration-mitigation devices for new and existing structures and help accrue economic and other benefits.
The objectives of this research were to (1) develop test procedures for evaluating the effectiveness of vibration-mitigation devices for structural supports of signs, luminaires, and traffic signals and (2) propose procedures for considering the effectiveness of these devices in the design process of the structural supports. The findings of this research led to incremental advancement in the body of knowledge on this topic. NCHRP 12-111 Final Contractor's Report is now available. Draft procedures, derived from this research, were given to AASHTO for consideration for potential incorporation into the AASHTO LRFD SLTS Specifications.
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