01020224

Component

https://doi.org/10.3141/1928-07

http://scholar.google.com...wman&publication_year=2005

Double–mast arm cantilevered sign structures are widely used in Indiana and in many other states. Because of the large sign area and relatively high flexibility, wind loading on these sign structures occasionally produces significant stress cycles. Cracking caused by fatigue damage may occur at several critical spots on the sign structures. An analytical investigation of the fatigue lives of the critical details in double–mast arm sign structures is discussed in this paper. An analytical procedure is introduced, and wind load selection and simulation are explained. Finite element models based on a prototype double–mast arm sign structure are described, and dynamic analyses and fatigue life results are presented. It was found that the post-to–base plate socket weld connection was the most critical detail and that variations in the fatigue life occurred because of differences in the wind environment at various sites.

01020206

English

pp 64-72

2005

Transportation Research Record: Journal of the Transportation Research Board

030909402X

Print

Figures (5) ; Photos (3) ; References (16) ; Tables (2)

Cantilevers; Cracking; Fatigue strength; Finite element method; Sign supports; Simulation; Wind

Fatigue life; Mast arms; Weld connections

Design; Highways; I20: Design and Planning of Transport Infrastructure

TRIS, TRB, ATRI

Mar 13 2006 9:30PM

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