Análisis de la resistencia al impacto de una muestra de barandas de seguridad simple usadas en carreteras

Abstract

The objective of this curricular integration work was to review standards focused on the behavior of a simple W-type road safety railing, together with a test that simulated the side impact of a vehicle against the railing and a crash simulation in software similar to test; taking into consideration data on the mass, speed and angle of impact of the vehicle in a crash based on the UNE EN 1317-2011 Standard, which indicated what type of vehicle corresponds according to the mass. The speed was based on the value allowed by the Ecuadorian Traffic Agency, the configuration of the test specimen had specific dimensions according to the Ecuadorian Standard NTE INEN 2473-2013, the assembly of the specimen presented an anchor plate that allows connecting by bolt railing posts to concrete; The design analysis of the bolts and the connection welding was carried out, which was based on shear forces and moments that generate bending and torsion, the test data was obtained by means of strain gauges and accelerometers, values were also obtained visually. At the end of the work, simulation and impact test results were obtained, which showed that a light vehicle in the specified conditions can be redirected by a simple W-type safety rail and can avoid catastrophic accidents considering the limits mentioned during the work. Finally, it was possible to indicate that users who have this type of crash would suffer minor injuries according to the acceleration severity index of the standard; the results of the simulation were validated by the criterion of the behavior of the energies of the system during the analysis.