防撞活动护栏碰撞分析

为确定几种新型防撞活动护栏安全性能,采用有限元仿真分析和实车足尺碰撞试验相结合的技术手段,对几种新型防撞活动护栏进行碰撞分析.结果表明,折叠式活动护栏对小型车辆形成绊阻,不满足评价标准要求；小客车和大客车碰撞链式混凝土、桁架式和钢管预应力索活动护栏后均能恢复到正常行驶姿态,小客车车体重心处加速度最大值分别为9.78,8.8和8.1g,小客车驶出角度分别为10.2°,9.8°和10.2°,大客车驶出角度分别为6.8°,4°和0°,护栏最大动态变形分别为1.25,0.807和1.093 m,3种护栏防撞能力分别达到93,93和160kJ.

Impact Analysis of Crashworthiness Moveable Barriers

In order to confirm the safety performance of several new type crashworthiness moveable barrier,impact analysis were conducted using finite element analysis and full-scale impact tests.The results indicate that foldable moveable barrier tripped the car and doesn＇t meet the requirement of criteria; After impact the concrete chain type moveable barrier,the truss type moveable barrier and the pretension wire in tube type moveable barrier,the cars and buses all come back to normal run performance,the maximum acceleration at the position of car gravity center are 9.78g,8.8g and 8.1g respectively,the car exit angles are 10.2°,9.8° and 10.2° respectively,the bus exit angles are 6.8°,4° and 0° respectively,the maximum dynamic deformation of barriers are 1.25m,0.807m and 1.093m respectively,and the crashworthiness of the barriers reach 93kJ,93kJ and 160kJ respectively.The study will supply data to applied projects and forms reference to relative guideline amended.