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首页> 外文期刊>Journal of bridge engineering >Performance of a Developed TL-5 Concrete Bridge Barrier Reinforced with GFRP Hooked Bars: Vehicle Crash Testing
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Performance of a Developed TL-5 Concrete Bridge Barrier Reinforced with GFRP Hooked Bars: Vehicle Crash Testing

机译：GFRP钩筋增强的已开发TL-5混凝土桥梁屏障的性能：车辆碰撞测试

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摘要

Deterioration of concrete bridge barriers as a result of corrosion of internal steel reinforcement in severe environmental conditions is a major problem. Glass-fiber-reinforced polymer (GFRP) bars are currently used as an alternative to the conventional steel reinforcement because of their corrosion resistance, long-term durability properties, and exceptionally high tensile strength. A recent design project conducted at Ryerson University on a TL-5 bridge barrier proposed the use of 15M and 13M GFRP bars as vertical reinforcement in the barrier front and back faces at 300mm spacing, respectively; 15M GFRP bars were used as horizontal reinforcement in the barrier wall. The connection between the deck slab and the barrier wall utilized GFRP bars with a 180 degrees hook for proper anchorage. To qualify the developed GFRP-reinforced barrier for use in Canada, a vehicle crash test was performed according to the safety-performance evaluation guidelines of the 2009 AASHTO Manual for assessing safety hardware (MASH) for Test Level 5 (TL-5). The crash test involved a 36,000-V vehicle impacting the barrier at a target impact speed and impact angle of 80km/h and 15 degrees, respectively. This article summarizes the procedure and the results of the vehicle crash test conducted on the developed GFRP-reinforced barrier. Criteria to evaluate crash-test results showed that (1) the barrier controlled and redirected the vehicle to the lane; the vehicle did not penetrate, underride, or override the barrier; (2) no concrete detached elements, fragments, or other debris from the barrier penetrated the occupant compartment or presented undue hazard to others in the area; (3) the occupant compartment remained undeformed; and (4) the truck remained upright during and after the collision. As such, the developed barrier performed acceptably according to MASH TL-5. The calculated equivalent impact force, acceleration, deflection, and recorded strains caused by vehicle impact are presented. (c) 2017 American Society of Civil Engineers.
机译：在严重的环境条件下，由于内部钢筋的腐蚀导致混凝土桥梁屏障的劣化是一个主要问题。玻璃纤维增​​强聚合物（GFRP）钢筋由于其耐腐蚀性，长期耐用性和极高的抗张强度，目前可替代传统的钢增强材料。瑞尔森大学（Ryerson University）最近在TL-5桥梁护栏上进行的设计项目建议在护栏正面和背面以300mm的间距分别使用15M和13M GFRP筋作为竖向钢筋； 15M GFRP筋用作挡土墙的水平钢筋。楼板和挡土墙之间的连接使用了带有180度弯钩的GFRP钢筋，以进行适当的锚固。为了使已开发的GFRP增强障碍物在加拿大使用，符合2009 AASHTO手册安全性能评估指南的车辆碰撞测试，以评估5级测试（TL-5）的安全硬件（MASH）。碰撞测试涉及一辆36,000-V的车辆以80 km / h和15度的目标撞击速度和撞击角撞击障碍物。本文总结了在已开发的GFRP增强型障碍物上进行的车辆碰撞测试的过程和结果。评估碰撞测试结果的标准表明：（1）障碍物控制了车辆并将其重定向到车道；车辆未穿透，超越或越过障碍物; （2）障碍物上没有混凝土分离的元件，碎片或其他碎屑穿透乘员舱或对该区域的其他人员造成不当危害； （3）乘员舱未变形； （4）在碰撞过程中和碰撞后，卡车保持直立。这样，根据MASH TL-5，显影的屏障表现良好。给出了计算出的等效冲击力，加速度，挠度和记录的由车辆冲击引起的应变。 （c）2017年美国土木工程师学会。

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