摘要
针对互通式立交设计过程中匝道设计参数的不确定性,基于可靠度理论和车辆发生事故类型分别建立车辆侧滑与侧翻2种综合行车失效模型,分别研究小轿车与大货车行驶于冰雪路面状态下的行车安全性,采用一次二阶矩法计算综合失效概率,以确定设计参数取值的可靠性。研究结果表明,在相同驾驶条件下,随着车辆运行速度的增大,小轿车比大客车易于发生侧滑,大货车比小轿车易于发生侧翻;匝道超高从6%增至8%时,行车失效概率变化较小,综合行车舒适性、行车安全性等,建议环形匝道最大超高值不大于6%。
In view of the uncertainty of ramp design parameters in the interchange design process,based on the theory of reliability and vehicle accident types,this paper respectively sets up vehicle sideslip and rollover two kinds of comprehensive driving failure model. Studied the driving safety of cars and trucks on pavements with snow and ice respectively,and applied the first-order secondmoment method to calculate general failure probability which determines the reliability of the design parameter selection. The results show that,under the same driving conditions,with the increase of speed,the car is easy to be skidded and the truck is easy to rollover. When the superelevation of ramps increases from 6% to 8%,the failure probability of driving changes little. Integrated the driving comfort and driving safety,it is suggested that the maximum superelevation in the loop ramp is not more than 6%.
作者
顾辉
GU Hui(JSTI Group Co.,Ltd.,Nanjing 210017,China)
出处
《现代交通技术》
2020年第3期65-69,共5页
Modern Transportation Technology
