Dynamic Testing of Steel W-Beam Guardrail Elements Using the FOIL 2000P Pendulum: FOIL Test Numbers 00P007 Through 00P017
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2001-03-01
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Abstract:This report contains the test procedures followed and test results from 10 crash tests between the FOIL 2000P pendulum and a four-post steel w-beam guardrail. The tests were conducted at the Federal Highway Administration's (FHWA) Federal Outdoor Impact Laboratory (FOIL) located at the Turner-Fairbank Highway Research Center (TFHRC) in McLean, Virginia. The target test speeds for these tests ranged from 15 km/h to 40 km/h. The target test inertial weight of the pendulum was 2000 kg (actual was 2032 kg). The 2000P pendulum was configured with a rigid nose assembled using an oak nose-piece mounted to a steel frame. The four-post steel w-beam guardrail was semi-rigidly anchored using standard 20-mm guardrail wire-rope anchor cables. The two interior posts were standard G4(ls) steel strong posts. The tests were conducted to provide baseline dynamic material properties of w-beam guardrail. The data will be used to establish a possible test procedure and minimal test requirement for prototype guardrail beam elements fabricated from composite materials. The tests also were conducted to ensure that the new concrete and steel pendulum mass and its associated rigging and other accessories were structurally sound and practical. The results indicate that the new pendulum was both structurally sound and compatible with the pendulum facility. The test data provided a baseline response of the steel w-beam. The steel w-beam splice failed at a test speed of 40 km/h. The 35- km/h 2000P pendulum impact test could serve as a minimum energy level that a composite rail prototype ought to withstand before being considered as an alternative.
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