Development of cost-effective PL-3 concrete bridge barrier reinforced with sand-coated glass fibre reinforced polymer (GFRP) bars: vehicle crash test

Abstract

Corrosion of steel reinforcement due to environmental effects is a major cause of deterioration problems in bridge barriers. Glass fibre reinforced polymer (GFRP) bars, as a suitable alternative, addresses the corrosion-related problems of steel reinforcing bars. Recent research work conducted at Ryerson University on PL-3 bridge barrier proposed a cost-effective barrier configuration incorporating high-modulus GFRP bars with headed ends. To qualify the developed barrier configuration for use in bridge construction, a full-scale PL-3 barrier wall of 27.6 m length was constructed to perform vehicle crash testing. The crash test was performed in accordance with MASH Test Level 5 (TL-5). Evaluation criteria for full-scale vehicle crash testing were based on three appraisal areas namely: (i) structural adequacy; (ii) occupant risk; and (iii) vehicle trajectory after collision. Crash test results showed that the barrier contained and redirected the vehicle. The vehicle did not penetrate or override the parapet. No detached elements, fragments, or other debris from the barrier were present to penetrate or show potential for penetrating the occupant compartment, or to present undue hazard to others in the area. No occupant compartment deformation occurred. The test vehicle remained upright during and after the collision event. Estimates of the equivalent impact force and associated energy absorbed by the barrier wall due to vehicle impact were deduced.