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- W202848346 abstract "The safety performance of concrete median barriers (CMB) was investigated using non-linear finite element crash simulations. The investigation was motivated by concerns over the viability of commonly used CMB designs under the proposed update to the national crashworthiness standards, particularly the Test Level 4 requirements for longitudinal barriers. The analysis focused on procedures for Test 4-12 from National Cooperative Highway Research Program (NCHRP) report 350, and the update of it. Test 4-12 involves impacts of a single unit truck (SUT) into the longitudinal barrier. This effort was undertaken to study the effects of various factors in crash performance for CMBs to assess alternative criteria and identify design retrofit options. A modeling and crash simulation analysis approach was seen as a cost efficient method to consider various alternatives. LS-DYNA was used to execute a series of crash simulations using finite element models of an SUT and various CMB designs. The basic models were validated using full-scale crash test results. Simulations were performed to study the effect of vehicle weight (8, 10, and 12 tons), impact speed (80, 90, and 100 km/hr), barrier height (32, 37, and 42 in), barrier shape (New Jersey and F- shapes), and side-wall friction on crash performance. The results showed that vehicle speed and barrier height are the two most important factors in performance of CMBs. The effects of friction and barrier shape were less significant." @default.
- W202848346 created "2016-06-24" @default.
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- W202848346 date "2008-10-01" @default.
- W202848346 modified "2023-09-27" @default.
- W202848346 title "Safety Performance of Concrete Median Barriers under Updated Crashworthiness Criteria" @default.
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