综合功能城市桥侧护栏开发

针对城市快速路对桥侧护栏的安全性、绿化、协调性的特殊需求,参考国内外相关标准提出城市快速路桥侧护栏碰撞条件和评价标准,开发出具有综合功能的桥侧护栏,并利用有限元仿真技术手段进行安全评价。研究结果表明,桥侧混凝土护栏结构能够有效防护车辆,小客车碰撞后驶出角度为7°,大客车碰撞后驶出角度为1.7°,小客车碰撞后重心加速度最大值为17.4g,大客车碰撞后护栏最大动态变形小于100mm,护栏达到SS级520kJ的防撞能力。护栏可进行绿化物种植,并能和灯杆、标志牌等协调安装。此种桥侧护栏已在实际工程中应用。

Developmental Research on an Intergrated Function Urban Roadside Bridge Barrier

According to special needs of bridge roadside barrier for safety, green and coordination on city express- way, based on impact condition and safety evaluation index refered to relevant standards at home and abroad, multi- function bridge roadside barrier was developped using finite element analysis method. The results show that the new structure of the urban bridge roadside barrier can effectively blocking traffw with better guidance, the angle of car pulled out after the collision is 7~, bus is 1.7~, the maximum acceleration of car after the collision is 17.4g, the max- imum dynamic deformation of barrier after the collision is less than 100mm, and the crashworthniss ability of the bar- rier reaches SS level 520kJ. Moreover, the barrier is easy to plant greens, and easy to coordinate with lamp posts and mark card posts. Bridge roadside barrier has been applied in reality project.