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Wind and Structures Volume 15, Number 4, July 2012 , pages 345-354 DOI: https://doi.org/10.12989/was.2012.15.4.345 |
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On wind stability requirements for emergency car warning triangles |
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A. Scarabino, J.S. Delnero and M. Camocardi
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| Abstract | ||
| This work discusses the wind stability requirements specified by UN Reg. 27 on emergency car warning triangles, which are of mandatory use in many countries. Wind tunnel experiments have been carried out in order to determine aerodynamic coefficients of commercial warning triangles and the friction coefficients between the triangle legs and an asphalt base that fulfils the roughness requirements stated by Reg. 27 for wind stability certification. The wind stability specifications for warning triangles are reviewed, compared with pressure field measurements and discussed. Results of wind tunnel tests and comparison with field measurements reported in the literature show that the requirements could be excessively conservative. | ||
| Key Words | ||
| warning triangles; drag coefficient; wind stability; UN regulations | ||
| Address | ||
| A. Scarabino : Laboratorio de Capa Limite y Fluidodinamica Ambiental, LaCLyFA, Universidad Nacional de La Plata, Calle 116 e/ 47 y 48, 1900 La Plata, Argentina J.S. Delnero and M. Camocardi: Laboratorio de Capa Limite y Fluidodinamica Ambiental, LaCLyFA, Universidad Nacional de La Plata, Calle 116 e/ 47 y 48, 1900 La Plata, Argentina , Consejo Nacional de Investigaciones Cientificas y Tecnicas, Avda. Rivadavia 1917, CP C1033AAJ, Cdad. de Buenos Aires, Argentina | ||