Performance of W-Beam Splices

Structural failure of post-and-beam W-beam guardrails during impact sometimes is due to the rupture of the W-beam rail where two sections are spliced together with bolts. Summarized is a study of the mechanics of failure of the splice connection. The causes of rupture are identified, and a design al...

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Bibliographic Details
Published in:Transportation research record 2001, Vol.1743 (1), p.120-125
Main Authors: Ray, Malcolm H., Plaxico, Chuck A., Engstrand, Klas
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Exact sciences and technology
Ground, air and sea transportation, marine construction
Road operations (signalization, lighting, safety and accessories, snow clearance, acoustical panel, etc.)
Road transportation and traffic
Transportation infrastructure
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Summary:Structural failure of post-and-beam W-beam guardrails during impact sometimes is due to the rupture of the W-beam rail where two sections are spliced together with bolts. Summarized is a study of the mechanics of failure of the splice connection. The causes of rupture are identified, and a design alternative is formulated that will reduce the likelihood of rupture of the splice connection. The tensile forces in the W-beam rail and the mode of deformation of the splice connection during impact were critical factors considered in the study. The results of full-scale crash tests, laboratory tests, and finite element analysis indicate that relocating splices to midspan locations would greatly reduce the chance of observing a rupture of the guardrail in full-scale crash tests and in real-world collisions.
ISSN:0361-1981
2169-4052
DOI:10.3141/1743-16