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Wind and Structures
  Volume 7, Number 6, November 2004, pages 393-404
DOI: http://dx.doi.org/10.12989/was.2004.7.6.393
 


Stability analysis of truss type highway sign support structures
Jun Yang, Michael P. Culmo and John T. DeWolf

 
Abstract
    The design of truss type sign support structures is based on the guidelines provided by the American Association of State Highway and Transportation Officials Standard Specifications for Highway Signs, Luminaries and Traffic Signals and the American Institute of Steel Construction Design Specifications. Using these specifications, the column design strength is normally determined using the effective length approach. This approach does not always accurately address all issues associated with frame stability, including the actual end conditions of the individual members, variations of the loads in the members, and the resulting sidesway buckling for truss type sign support structures. This paper provides insight into the problems with the simplified design approach for determining the effective lengths and discusses different approaches for overcoming these simplifications. A system buckling approach, also known as a rational buckling analysis, is used in this study to determine improved predictions for design strength of truss type sign support structures.
 
Key Words
    buckling; sign supports; stability; steel design; trusses; wind loading.
 
Address
Jun Yang; Department of Civil & Environmental Engineering, University of Connecticut, Storrs, CT 06268, USArnMichael P. Culmo; CME Associates, Woodstock, CT 06281, USArnJohn T. DeWolf; Department of Civil & Environmental Engineering, University of Connecticut, CT 06268, USA
 

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