韩艳 1?覮,刘叶1,黄静文1,蔡春声1,2,陈■人1,3.考虑车桥间气动干扰的桥上车辆行驶安全性分析[J].湖南大学学报:自然科学版,2019,(7):76~85
考虑车桥间气动干扰的桥上车辆行驶安全性分析
Traffic Safety Analysis of Vehicles on a Bridge Considering the Aerodynamic Interference between Vehicles and Bridge
  
DOI:
中文关键词:  桥梁工程  风-车-桥系统  气动干扰  行车安全性分析  临界风速
英文关键词:bridge engineering  wind-vehicle-bridge system  aerodynamic interaction  driving safety analysis  critical wind speed
基金项目:
作者单位
韩艳 1?覮,刘叶1,黄静文1,蔡春声1,2,陈■人1,3 (1. 长沙理工大学 土木与建筑学院湖南 长沙 410114 2. 美国路易斯安那州立大学路易斯安那州 巴吞鲁日 LA70803 3. 美国科罗拉多州立大学科罗拉多州 柯林斯堡 LA80523) 
摘要点击次数: 30
全文下载次数: 39
中文摘要:
      为了研究车桥间气动干扰对桥上车辆行驶的影响,以重庆太洪长江大桥为研究背景,针对厢式货车和小轿车2种车型,对强风作用下车桥的动力响应和车辆的行车安全性进行了分析. 首先基于风-车-桥耦合整体分析系统,分别获得考虑与不考虑车桥间气动干扰两种情况下车辆的竖向、俯仰、侧倾加速度响应以及桥梁侧向加速度响应,将获得的加速度响应导入MATLAB所编制的局部事故分析程序中,获得车辆侧滑位移和每个车轮反力比,根据行车事故判定准则,判断车辆是否发生事故;然后通过逐级增加车速和风速,得到了2种车型在不同车速下的临界风速. 研究结果表明:考虑车桥间气动干扰对车辆动力响应影响较大,从而对桥上车辆行驶安全性影响显著,不考虑车桥间气动干扰的行车安全性分析结果偏保守,此外,考虑车桥间气动干扰还影响车辆在桥上行驶时发生的事故类型. 研究结果为强风气象条件下大跨度桥梁的运营安全和科学管理提供了合理的理论参考和数据支撑.
英文摘要:
      In order to investigate the effect of aerodynamic interaction between vehicles and a bridge on the driving safety of vehicles on a bridge, the Taihong Yangtze River Bridge of Chongqing in China was taken as an example, and the driving safety of vehicles and dynamic responses of vehicles and the bridge under strong wind were investigated for the two typical types of vehicles——a van and a car. Firstly, based on the wind-vehicle-bridge coupling analysis system, the vertical, pitching and rolling accelerations of the vehicles, and the lateral acceleration of the bridge were calculated with and without consideration of the aerodynamic interference between the vehicles and bridge. Then, these acceleration responses of the vehicles and bridge were applied to the local accident analysis program built by MATLAB. The sideslip displacement and the reaction force ratio of each wheel of the vehicles were calculated. The accidents of the vehicles were assessed by comparing the calculated responses of the vehicles with the accident criteria. Further, the accident critical wind speeds of the vehicles at different traveling speeds were obtained by gradually increasing the traveling speed and wind speed, and the curves of the accident critical wind speed versus the traveling speed for the two types of vehicles with and without consideration of the aerodynamic interference were plotted. The results show that the aerodynamic interference between the vehicles and the bridge has a significant influence on the driving safety of vehicles on the bridge. The assess results are relatively conservative if the aerodynamic interference between the vehicles and bridge is not considered. In addition, the aerodynamic interference also affects the vehicle accident type. This paper can provide a reasonable theoretical reference and data support for the operation safety and scientific management of long-span bridges under strong wind weather conditions.
查看全文  查看/发表评论  下载PDF阅读器
关闭