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原文传递 VEHICLE CRASH TESTS OF THE AESTHETIC, SEE-THROUGH CONCRETE BRIDGE RAIL WITH SIDEWALK, TYPE 80SW

题名：	VEHICLE CRASH TESTS OF THE AESTHETIC, SEE-THROUGH CONCRETE BRIDGE RAIL WITH SIDEWALK, TYPE 80SW
作者：	Robert Meline, John Jewell, Rich Peter
关键词：	Barriers, Crash Test, Bridge Rail, Concrete, Vehicle Impact Test, Aesthetic, See-Through
摘要：	An aesthetic, see-through concrete bridge rail with sidewalk. Type 80SW, was built and tested in accordance with NCHRP Report 350. The Type 80SW is an 810 mm-tall, reinforced concrete barrier on a 200 nun-high sidewalk. The rail has 280 mm high by 1620 mm-long gaps, 230 mm above the sidewalk surface. The rail is fitted with a single metal tube spanning the gap and a 250 mm-high handrail attached to the top of the concrete barrier. The barrier tested was 22.8 m-long and was constructed at die Caltrans Dynamic Test Facility in West Sacramento, California. A total of four crash tests were conducted under Report 350 test Level 4, two with 820 kg cars, one with a 2000 kg pickup truck and one with an 8000 kg single unit van truck. The first test of die 820 kg car showed a potential snagging problem on one of the vertical members. The potential problem with the first car led to a reduction in the vertical gap from 310 nun to 280 mm and a retest with a different car. The secc.id test did not show snagging problems, with all results within the guidelines. The hood of the 2000 kg pickup snagged on a vertical handrail support tube during impact causing minor occupant compartment deformation. Since this bridge rail is intended for pedestrian use and alone does not provide for pedestrian protection, it should only be used in low speed applications of 70 km/h or less. In addition, the handrail has been found to be a snagging hazard at the higher speed. For these two reasons, the Type 80SW is recommended for approval on California highways requiring TL-2 bridge rails.
报告类型：	科技报告