Personnel of the Texas Transportation Institute conducted a series of four vehicle crash tests to evaluate an energy-absorbing bridge rail which was designed in a joint effort by engineers of the Bureau of Public Roads and those of the Southwest Research Institute. The energy-absorbing system was a blocked-out six by six box beam guardrail, attached to support posts. The blocking out of the box beam is accomplished support by a guide tube and a thin aluminum fragmenting tube. The bridge guide tube acts to prevent movement of the box beam in a longitudinal and vertical direction, but slips through its support on the support post to allow lateral movement of the box beam. After 18 inches of lateral movement, the box beam comes into contact with the rigid support posts which develop a high level of lateral restraint.
Energy-Absorbing Bridge Rail (Fragmenting Tube)
1970
39 pages
Report
Keine Angabe
Englisch
Low-Maintenance, Energy-Absorbing Bridge Rail
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