针对目前防撞柱研究只停留于软件分析问题,详细介绍研发的结构防撞实验设施及利用该设施完成的钢管混凝土防撞柱系统实车碰撞试验.试验用撞击卡车加配重总重6.8t,发生撞击时速度约12 m/s,卡车货厢前沿未穿过碰撞前的防撞柱内侧边缘即被完全阻止,符合规定[6]的防撞柱K4等级要求.对防撞柱进行静力推覆对比试验,获得防撞柱荷载-挠度曲线,并据此对碰撞试验的能量转换进行分析.获得卡车与柱状物撞击时卡车前部变形刚度系数及最大撞击力计算公式,并提出防撞柱的简化设计方法.%Bollards are more and more utilized in guarding important buildings against potential attack by terrorists using car bomb.Most existing studies on bollards typically only stay in an analysis phase and experimental studies are quite rare.Here,a new facility for testing car collisions with structures or transportation facilities was developed.An actual truck collision test was conducted to study the effectiveness of a newly designed concrete filled tubular anti-ram bollard system.The total weight of the collision truck was 6.8 tons.During collision,the speed of the truck was about 12m/s.The collision test results showed that the front edge of the cargo bed does not reach the pre-impact inside edge of the bollard,the collision truck is completely stopped,in full compliance with the K4 level according to the U.S.standard SD-STD-02.01.The load versus deflection curve was obtained through the comparative static test of the bollard.The energy conversion in the collision test was analyzed.According to the simplified analysis of the collision test,the formulas for the deformation stiffness of the front of the truck and the maximum impact force were obtained and a simplified design procedure was proposed.
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