组合式护栏设计优化及安全性能评价  

Design Optimization and Safety Performance Evaluation of Combined-type Barrier

作　　者：郑斌[1] 马亮 王昊宇[1] 闫书明 贾宁 敬敏 

机构地区：[1]四川雅西高速公路有限责任公司,四川成都610041 [2]北京中路安交通科技有限公司,北京100070

出　　处：《城市道桥与防洪》2011年第11期31-34,148,共4页Urban Roads Bridges & Flood Control

摘　　要：该文采用计算机仿真分析方法,对某组合式护栏进行安全性能评价。原设计护栏由于上部钢结构为"强柱弱梁"形式,且横梁迎撞面距离立柱迎撞侧的间距较小,横梁在碰撞力方向刚度弱,从而导致大客车碰撞护栏后在立柱处发生绊阻,不满足安全性能评价标准要求。优化后护栏在减少材料用量的同时,有效地提高了防护能力,其防撞等级可达到SS级(520 kJ),安全性能满足评价标准要求。The article evaluates the safety performance of a combined-type barrier by the computer simulation analysis method. The upper steel structure of the original barrier was composed of weak beam and strong post, and the small distance from impact surface of beam to impact surface of post led to weak rigidity of beam in the direction of impact force, which resulted in bus stumbled near the post after impacting the barrier and does not satisfy the safety performance evaluation standards. The optimized barrier efficiently enhances the protective capacity while its material consumption decreases. Its impact grade can achieve SS (520k J), and its safety performance can satisfy the evaluation standards.

关 键 词：护栏 计算机仿真 有限元方法 安全性能评价 设计优化 

分 类 号：U491.5[交通运输工程—交通运输规划与管理]