摘要
桥梁是高速公路运行的关键节点,桥面与路面连接特殊的构造特征致使其结冰存在临界点,因此存在较大的运行风险。研究路桥连接处临界条件下车辆运行安全状态,对提升高速公路交通安全水平具有重要的意义。针对桥梁结冰且路基段未结冰的临界状态下高速公路运行风险行为的问题,依托气象环境模拟实验系,对干燥路面、小雪路面、薄冰路面3种路面在临界状态下的摩擦因数进行测定。基于不同路面状态摩擦因数并结合驾驶模拟实验系统,采集平均速度、纵向加速度、横向加速度、方向盘转角4个指标的驾驶行为数据。结果表明:在3种不同临界状态路桥连接处的驾驶行为变化规律特征显著不同,并通过功效系数法计算路桥连接处3种路面状态下的驾驶风险值,可见路桥连接处的临界状态具有较高的风险水平。
The bridge is the key node of expressway operation.The special structural characteristics of the bridge deck and pavement connection lead to the existence of a critical point of icing,so there is a greater operational risk.In order to study the safety state of vehicle operation under the critical conditions of the road bridge connection,it is of great significance to improve the level of expressway traffic safety.Aiming at the problem of expressway operation risk behavior under the critical state of bridge icing and subgrade section not icing,the friction coefficient of dry pavement,light snow pavement and thin ice pavement under the critical state was studied based on the meteorological environment simulation experiment system.Based on the friction coefficient of different road conditions and combined with the driving simulation experiment system,the driving behavior data of average speed,longitudinal acceleration,lateral acceleration and steering wheel angle were collected.The results show that the characteristics of driving behavior change at the road bridge junction in three different critical states are significantly different.The driving risk value under the road surface state in the road bridge junction 3 is calculated by the efficiency coefficient method.It is concluded that the critical state at the road bridge junction has a higher risk level.
作者
申全军
樊兆董
王孜建
张昱
杨耀辉
SHEN Quan-jun;FAN Zhao-dong;WANG Zi-jian;ZHANG Yu;YANG Yao-hui(Innovation Research Institute,Shandong Expressway Group Co.,Ltd.,Jinan 250000,China;Shandong Transportation Research Institute,Jinan 250000,China)
出处
《科学技术与工程》
北大核心
2023年第29期12730-12736,共7页
Science Technology and Engineering
基金
山东省交通运输厅科技计划(2020B46)。
关键词
交通工程
高速公路桥梁
驾驶模拟
运行风险
traffic engineering
highway bridge
driving simulation
operation risk
