混凝土护栏高度影响防护性能机理研究  

Study on Mechanism of Influence of Concrete Barriers Height on Protective Performance

作　　者：贾宁 李伟 幺瑶 冯移冬 张耿朝 JIA Ning;LI Wei;YAO Yao;FENG Yidong;ZHANG Gengchao(National Observation and Research Station of Corrosion of Road Materials and Engineering Safety in Dadushe Beijing,Beijing 100088,China;Research Institute of Highway,Ministry of Transport,Beijing 100088,China)

机构地区：[1]北京大杜社公路材料腐蚀与工程安全国家野外科学观测研究站,北京100088 [2]交通运输部公路科学研究院,北京100088

出　　处：《交通工程》2024年第5期114-119,共6页Journal of Transportation Engineering

基　　金：科技部项目科技基础资源调查专项资助(项目编号:2022FY101400)。

摘　　要：为了研究混凝土护栏高度影响防护性能的机理,采用经实车碰撞试验校核的高精度车辆碰撞护栏仿真模型,针对SA级和SS级带阻爬坎的F型坡面混凝土护栏以及单坡面混凝土护栏,进行小型客车、大型客车和大型货车3种车型碰撞护栏数值仿真模拟,对比护栏高度降低和标准护栏高度时护栏防护性能指标的差别。研究结果表明,对于带阻爬坎的F型坡面混凝土护栏,由于各种车型车体结构和特征几何参数等的差异,与阻爬坎碰撞接触作用效果不同,护栏高度降低后对防护性能的影响也有所区别,特别是SS级混凝土护栏,护栏高度降低后对大型货车设计防护车型的防护效果更优;对于单坡面混凝土护栏,总体而言护栏高度降低后防护效果更不利,但对护栏导向功能未产生不利影响。In order to study the mechanism of the influence of the height of concrete on the protective performance,a high-precision simulation model verified by real vehicle crash test was adopted to conduct numerical simulation of small passenger car,large passenger car and large truck,aiming at the F-type slope concrete with climbing-stop and single slope concrete of SA and SS class.The difference of protection performance index between the s with reduced height and standard height is analyzed.The research results show that for F-type slope concrete with climbing-stop,due to the differences in vehicle body structure and characteristic geometric parameters,the impact of collision contact with the climbing-stop is different,and the impact of the height reduction on the protection performance is also different,especially for the SS-class concrete with height reduction,the protection effect of design protection truck is better.For single-slope concrete,in general,the protective effect is more unfavorable after the height of the is reduced,but there is no adverse impact on the guiding function.

关 键 词：交通工程 混凝土护栏 高度 防护性能 碰撞数值仿真模拟 

分 类 号：U491[交通运输工程—交通运输规划与管理]