Abstract
Sign and traffic signal structures are susceptible to fatigue damages caused by wind, temperature change, and road-induced excitation. This study focuses on the stress intensity factor (SIF) ranges for octagonal tube-to-transverse plate joints widely used in sign and traffic signal structures. The finite element (FE) models were established and calibrated by using Newman and Bowness equations. The SIF ranges of the joints with fillet weld and full-penetration groove weld were compared. The effects of initial crack location, transverse plate thickness, tube diameter and thickness, taper ratio of tube, weld size, and number of bolts, on the SIF ranges of tube-to-transverse plate joint with fillet weld were intensively investigated. The suggestions for improving the remaining fatigue life of the joint were offered.
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