立柱填充混凝土组合式波形梁护栏的防护性能  

Research on the protective performance of W-beam guardrails for thin-walled columns filled with concrete

作　　者：徐伟龙 项彦茂 覃怡 孟云伟[2] 刘中帅 刘向洋 张坤 XU Weilong;XIANG Yanmao;TAN Yi;MENG Yunwei;LIU Zhongshuai;LIU Xiangyang;ZHANG Kun(Guangzhou North Second Ring Transportation Technology Co.,Ltd.,Guangzhou 510540,China;Chongqing Key Laboratory of Intelligent Integrated and Multidimensional Transportation System,Chongqing Jiaotong University,Chongqing 400074,China;China Merchants Chongqing Communications Technology Research and Design Institute Co.,Ltd.,Chongqing 400067,China;Shaanxi Gezhouba Yanhuang Ningshi Expressway Co.,Ltd.,Xi′an 710016,China)

机构地区：[1]广州市北二环交通科技有限公司,广东广州510540 [2]重庆交通大学智能综合立体交通重庆市重点实验室,重庆400074 [3]招商局重庆交通科研设计院有限公司,重庆400067 [4]陕西葛洲坝延黄宁石高速公路有限公司,陕西西安710016

出　　处：《混凝土》2024年第11期187-192,共6页Concrete

基　　金：国家重点研发计划(2022YFC3002603);重庆市交通运输委规范类项目(2023KJ020A1);重庆市研究生联合培养基地(JDLHPYJD2020029)。

摘　　要：为了探究立柱填充混凝土组合式波形梁护栏的防护性能,提出了一种新型波形梁护栏结构,即薄壁型填充混凝土立柱的护栏,将波形梁护栏立柱的厚度减薄至4 mm,且在其中填充C30混凝土。对这种护栏结构,构建了汽车与波形梁护栏的碰撞数值模型,并与实车碰撞试验进行对比,两种试验方法中的护栏整体变形及碰撞状态是一致的。研究结果表明:(1)3种试验车辆在与该结构形式的波形梁护栏发生碰撞的过程中,车辆均未发生穿越、跨越和骑跨现象,护栏的构件未侵入驾驶室,护栏结构未发生脱离;(2)车辆未发生翻车现象,全程在导向框内行驶;车辆碰撞速度的纵向和横向分量分别为9.4 m/s和7.7 m/s,加速度的纵向和横向分量分别为150.3 m/s^(2)和70 m/s^(2);(3)护栏均符合JTG B05—01—2013《公路护栏安全性能评价标准》中对A级护栏的阻挡、导向、缓冲功能的要求。研究成果可为波形梁护栏的升级改造利用的建设提供借鉴。In order to explore the protective performance of the composite W-beam guardrail filled with concrete columns,a new type of W-beam guardrail structure is proposed,which is a thin-walled guardrail filled with concrete columns.The thickness of the W-beam guardrail column filled with C30 concrete is reduced to 4 mm.A numerical model of the collision between a vehicle and a W-beam guardrail was constructed.A numerical model of the collision between a car and a corrugated beam guardrail was constructed for this guardrail structure,and compared with real vehicle collision tests.The overall deformation and collision state of the guardrail in the two test methods were consistent.The research results indicate that during the collision process between three test vehicles and the W-beam guardrail.(1)The vehicles did not cross or ride over the guardrail,and the components of the guardrail did not invade the driver′s cab,and the guardrail structure did not detach;(2)The vehicle did not overturn and drove within the guide frame during the passing journey;(3)The longitudinal and transverse components of vehicle collision velocity are 9.4 m/s and 7.7 m/s,respectively,and the longitudinal and transverse components of acceleration are 150.3 m/s^(2),respectively and 70 m/s^(2).The guardrails all meet the requirements of the“Standard for Safety Performance Evaluation of Highway Barriers”(JTG B05—01—2013)for the blocking,guiding,and buffering functions of A-level.The research results can provide reference for the upgrading,renovation,and utilization of W-beam guardrails.

关 键 词：波形梁护栏 防护性能 薄壁型填充混凝土立柱 数值模拟 实车碰撞试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]