NUMERICAL EVALUATION OF RETROFIT DESIGNS OF CABLE MEDIAN BARRIERS USING RECLAIMED TIRES
1 online resource (163 pages) : PDF
University of North Carolina at Charlotte
This thesis presents a research attempt at finding out a viable retrofit system design for cable median barriers using reclaimed tires. Finite element analysis was used to conduct simulations in order to evaluate the performance of retrofit barriers.Four designs of the retrofit tire-cable median barriers were modeled and tested under impacts by a 1996 Dodge Neon and a 2006 Ford F250 according to MASH test level 3 impact conditions. The simulations were conducted on a flat median and the vehicles were impacted on the barrier at 62.1 mph and 25° impact angle at the post to find out a feasible design out of the four proposed designs. These simulations were conducted in a systematic manner and a viable design option was found amongst the four proposed retrofit options and named as EDC_J1. Further evaluation of EDC_J1 design was carried out by setting up simulations for back side and front side impacts on post and mid-span on flat and sloped medians.The simulation results showed that the EDC_J1 barrier could successfully redirect the smaller sedan in most cases compared to the current cable median barrier without tires. The EDC_J1 tire-cable median barrier was also found to have less barrier deflection than the current design for impacts with smaller sedan.
CABLE MEDIAN BARRIERCRASHHIGHWAY SAFETYIMPACTMASHTIRE
Tabarraei, AlirezaWeggel, David
Thesis (M.S.)--University of North Carolina at Charlotte, 2017.
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