Abstract
ABSTRACTThe paper examines a road safety barrier of a N2-W4-A class, with a B-type guide bar, located on a road bend of a 150 m radius and shaped as a horizontal concave arc. In order to ensure accepting the TB11 and TB32 standard crash tests, a composite/foam/rubber overlay is designed, combined with the guide bar with screw connectors spaced by 2 m. The study develops a methodology for numerical modelling and simulation of unmodified (a straight barrier) and modified (a curved barrier) crash tests, without and with the overlay, including deformable joints with limited load capacities, contact with friction, tire pressure, posts embedded in deformable subsoil, gravity load and damping. The TB11- and TB32-simulated crash tests are conducted for the four above-mentioned barrier systems. It has been proved that the barrier with the overlay provides approval for the standard crash tests on road bends.
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