Evaluation of Vibration Mitigation Techniques for KDOT Cantilever and Butterfly Sign Structures

Cantilever and butterfly sign structures are susceptible to free vibrations induced by natural wind and truck gust loadings, as well as “galloping” responses to wind. When these vibrations are left uncontrolled, they can lead to cracking at the box connections between the cantilevered truss and the vertical support. Calculations performed by Kansas Department of Transportation (KDOT) engineers have indicated that the box connection details are susceptible to fatigue, and in fact, have recently replaced a cantilever sign that experienced severe cracking. Solutions are urgently needed to lower the vibration-induced fatigue stresses at box connections in these structures to effectively lengthen the safe useable lives of these expensive and low-redundancy structures.


    • English


    • Status: Active
    • Funding: $116774
    • Contract Numbers:

      K-TRAN: KU-20-2



    • Sponsor Organizations:

      Kansas Department of Transportation

      Eisenhower State Office Building
      700 SW Harrison Street
      Topeka, KS  United States  66603-3754
    • Performing Organizations:

      University of Kansas Center for Research, Incorporated

      2291 Irving Hill Drive, Campus West
      Lawrence, KS  United States  66045
    • Principal Investigators:

      Bennett, Caroline

    • Start Date: 20190701
    • Expected Completion Date: 20231231
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01751172
    • Record Type: Research project
    • Source Agency: Kansas Department of Transportation
    • Contract Numbers: K-TRAN: KU-20-2, RE-0793-01, C2148
    • Files: RIP, STATEDOT
    • Created Date: Sep 1 2020 1:47PM