基于横风作用的大跨径桥梁交通运行安全影响分析
Influence of Crosswind on Traffic Operation Safety of Long-Span Bridges
申全军 1王孜健 1邢小亮 2张昱 3高立晓 3陈亮3
作者信息
- 1. 山东高速集团有限公司创新研究院,山东 济南 250101
- 2. 同济大学 道路与交通工程教育部重点实验室,上海市 201804
- 3. 山东省交通科学研究院,山东 济南 250031;山东省路域安全与应急保障交通运输行业重点实验室,山东 济南 250102
- 折叠
摘要
横风作用对大跨径桥梁上车辆运行安全影响较大.为探究大跨径桥梁段横风特征参数与交通运行安全性间作用规律,以横风频发的黄河特大桥为试验段,分析桥梁上交通事故与横风分布规律的关系,建立横风作用下大跨径桥梁段交通运行协调性拟合关系模型.研究表明:各季节横风的发生具有较高离散性,横风作用是桥梁段发生侧翻的主要原因,追尾、刮擦、撞物事故直接或间接地受横风作用影响.结合车辆运行速度分布可知,春季和秋季交通运行协调性较差,且运行速度与横风分布特征一致.利用Poly非线性曲面拟合方法,建立运行速度与横风风速、风向间季节性函数关系模型,由模型拟合优度和显著性检验结果可知,该模型拟合优度R2均大于0.8,拟合结果满足收敛和统计学要求.通过剔除横风季节性特征,建立横风作用下大跨径桥梁交通运行安全性一般性模型,提升了模型的适用度.
Abstract
Crosswind has a great influence on the operation safety of vehicles on long-span bridges.To explore the relationship between the characteristic parameters of the crosswind and the traffic operation safety of the long-span bridge,the Yellow River Bridge with frequent crosswinds was taken as the experimental section,and the relationship between traffic accidents and the distribution of crosswinds on the bridge was analyzed.A fitting relationship model of traffic operation coordination of the long-span bridge under the action of the crosswind was established.The study shows that the occurrence of crosswinds in each season is highly discrete.The crosswind is the main cause of vehicle overturning on the bridge,and rear-end collision,scraping,and collision accidents are directly or indirectly affected by crosswinds.Combined with the operation speed distribution of the vehicle,coordination of traffic operation in spring and fall is poor,and the operation speed is consistent with the crosswind distribution.By using the Poly nonlinear surface fitting method,the seasonal function model of operation speed,crosswind speed,and wind direction is established.According to the goodness of fit and significance test results of the model,the goodness of fit R2 of the model is greater than 0.8,and the fitting results meet the requirements of convergence and statistics.By eliminating seasonal characteristics of crosswinds,a general traffic operation safety model of long-span bridges under the action of crosswinds is established,which improves the applicability of the model.
关键词
大跨径桥梁/交通安全/交通运行安全性/Poly非线性拟合/横风作用Key words
long-span bridges/traffic safety/traffic operation safety/Poly nonlinear fitting/action of crosswind引用本文复制引用
基金项目
国家自然科学基金(71673201)
山东省交通厅科技项目(2020B46)
出版年
2024
国家科技期刊平台
NSTL
万方数据