FIELD DYNAMIC STUDIES OF A LONG-SPAN SIGN STRUCTURE

A field study of a long-span, tubular signal bridge, very susceptible to wind-induced vibration, is described. Portions of a theoretical analysis performed by a recently developed computer program for the evaluation of "Wind Effects on Luminaires and Traffic Signals" (WEFFLS), were verified by field testing. The predicted resonant frequencies and lowest critical wind velocity--that wind velocity which will cause structure resonance--were confirmed by the tests. An in-situ value of structure damping, 0.2% of critical damping, was measured. /FHWA/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/14030
• Supplemental Notes:
  • Sponsored by DOT, Federal Highway Administration.
• Corporate Authors:

  California Department of Transportation

  1120 N Street
  Sacramento, CA  United States  95814
• Authors:
  • Nix, H D
  • Reinl, H
• Publication Date: 1973-12

Media Info

• Pagination: 50 p.

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Computer programs; Damping (Physics); Dynamics; Luminaires; Resonance; Sign supports; Signs; Structural design; Testing; Tubular structures; Velocity; Vibration; Wind; Wind resistant design
• Old TRIS Terms: Dynamic conditions; Sign structures; Wind velocity
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00165752
• Record Type: Publication
• Source Agency: Federal Highway Administration
• ISBN: 14030
• Report/Paper Numbers: FHWA-RD-77-50632, FCP 40S1502
• Contract Numbers: D-4-131
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 7 1978 12:00AM