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Sign support height analysis using finite element simulation

2001; Taylor & Francis; Volume: 6; Issue: 1 Linguagem: Inglês

10.1533/cras.2001.0160

1754-2111

Dhafer Marzougui, L C Meczkowski, Harry Taylor, Nabih E. Bedewi,

Traffic and Road Safety

Abstract Finite element (FE) computer simulation has been proven to be an essential tool for evaluating crashworthiness and safety performance of automobiles, roadside hardware appurtenances, as well as several other engineering structures. Its use has increased dramatically thanks to remarkable improvements in computer technology and finite element codes. In this study finite element simulation is used to analyse the safety performance of roadside sign support systems. Specifically, the study focuses on determining the effect of sign height on the amount of intrusion into the occupant compartment. The sign support system that is investigated in this study is the 4lb/ft U-post. FE models of 5ft (1.5m) and 7ft (2.1m) height signs were created and impacted with a set of vehicle models at different impact speeds. Five vehicle models were employed in the study: Chevrolet C2500 pickup, Geo Metro, Ford Taurus, Plymouth Neon, and Dodge Caravan. Three impact speeds were analysed: 20, 40, and 60mph (32, 64, and 96km/h). A total of 18 simulations were performed and the results were compared to evaluate intrusion of the signs into the occupant compartment. The simulation results were verified by conducting a full-scale test of the worst-case scenario, a Geo Metro into the U-post at 60 mph.