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Full-scale experiments of cantilever traffic signal structures

  • Cruzado, Hector J. (Department of Civil and Environmental Engineering, Polytechnic University of Puerto Rico) ;
  • Letchford, Chris (Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute)
  • 투고 : 2012.05.12
  • 심사 : 2012.10.03
  • 발행 : 2013.07.25

초록

Wind-induced vibrations of mast arms of cantilever traffic signal structures can lead to fatigue failure. Two such structures were instrumented each with a sonic anemometer and a camera that records the motions of the tip of the arm. It was observed throughout this experiment that large amplitude vertical vibrations of mast arms with signals with backplates occur for the most part at low wind speed ranges, between 2 to 7 m/s, and as the wind speed increases the amplitude of the vertical vibrations decreases. The results of these experiments contradict the generally accepted belief that vortex shedding does not cause significant vibrations of mast arms that could lead to fatigue failure, which have been attributed to galloping in the past. Two damping devices were tested with mixed results.

키워드

참고문헌

  1. AASHTO (2001), Standard specifications for structural supports for highway signs, luminaires, and traffic signals. 4th ed. Washington, DC: American Association of State Highway and Transportation Officials.
  2. ASCE (1961), Wind forces on structures, Trans ASCE, 126 Part II, 1124.
  3. Albert, M.N. (2006), Field testing of cantilevered traffic signal structures under truck-induced gust loads, Masters thesis, The University of Texas at Austin.
  4. Blevins, R.D. (1977), Flow-induced vibration. New York: Van Nostrand Reinhold Company.
  5. Chen, G., Wu, J., Yu, J. Dharani, L.R. and Barker, M. (2001), "Fatigue assessment of traffic signal mast arms based on field test data under natural wind gusts", Transport. Res. Record, 1770, 188-194. https://doi.org/10.3141/1770-24
  6. Cook, R.A., Bloomquist, D., Richard, D.S. and Kalajian, M.A. (2001), "Damping of cantilevered traffic signal structures", J. Struct. Eng.- ASCE,127(12), 1476-83. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:12(1476)
  7. Dexter, R.J. and Ricker, M.J. (2002), National cooperative highway research program report 469:fatigue-resistant design of cantilevered signal, sign, and light supports, Washington, DC: National Cooperative Highway Research Program.
  8. G Systems (2005), Structural performance DAQ user manual,Texas Tech University Wind Science and Engineering Version 2.0. Plano, TX: G Systems.
  9. Gray, B., Wang, P., Hamilton, H.R. and Puckett, J.A. (1999), "Traffic signal structure research - Univ. of Wyoming", In Structural Engineering in the 21st Century: Proceedings of the 1999 Structures Congress held in New Orleans, Louisiana, April 18-19, 1999, (Eds. Avent, R. and Alawady, M.) 1107-10. Reston, VA: American Society of Civil Engineers.
  10. Hamilton III, H.R., Riggs, G.S. and Puckett, J.A. (2000), "Increased damping in cantilevered traffic signal structures", J. Struct. Eng. - ASCE, 126(4), 530-537. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:4(530)
  11. Hartnagel, B.A. and Barker, M.J. (1999), "Strain measurements of traffic signal mast arms", In Structural Engineering in the 21st Century: Proceedings of the 1999 Structures Congress held in New Orleans, Louisiana, April 18-19, 1999, edited by R. Avent and M. Alawady, 1111-4. Reston, VA: American Society of Civil Engineers.
  12. Hirsch, G.H. and Bachmann, H. (1995), Dynamic effects from wind. Appendix H of Vibration problems in structures: Practical guidelines, by Hugo Bachman et al. Basel, Switzerland: Birkhauser.
  13. Kaczinski, M.R., Dexter, R.J. and Van Dien, J.P. (1998), National cooperative highway research program report 412: fatigue-resistant design of cantilevered signal, sign, and light supports. Washington, DC: National Academy Press.
  14. Pulipaka, N. (1995), Wind-induced vibrations of cantilevered traffic signal structures, PhD dissertation, Texas Tech University.
  15. Pulipaka, N., Sarkar, P.P. and McDonald, J.R. (1998), "On galloping vibration of traffic signal structures", J. Wind Eng. Ind. Aerod.,77 -78, 327-36. https://doi.org/10.1016/S0167-6105(98)00153-6
  16. Texas Department of Transportation, Traffic Operations Division. 1995. Traffic signal pole standards. In Traffic standards (Metric & English), http://www.dot.state.tx.us/insdtdot/orgchart/cmd/cserve/standard.toc
  17. Zuo, D. and Letchford, C.W. (2010), "Wind-induced vibration of a traffic-signal-support structure with cantilevered tapered circular mast arm", Eng. Struct., 32, 3171-3179. https://doi.org/10.1016/j.engstruct.2010.06.005

피인용 문헌

  1. Full-scale investigation of wind-induced vibrations of a mast-arm traffic signal structure vol.20, pp.3, 2015, https://doi.org/10.12989/was.2015.20.3.405
  2. Study of the aerodynamic damping of wing plates on traffic signal structures based on the 2D one-way FSI analysis vol.6, pp.4, 2013, https://doi.org/10.1080/24705314.2021.1902662