提出了一种企口式刚性混凝土活动护栏结构,可安装在高速公路分隔带开口处.基于现行规范要求,建立了相应的显式有限元仿真模型并利用LS-DYNA软件进行了实尺寸车辆模型与活动护栏的非线性碰撞仿真计算.结果表明:该活动护栏满足160 k J碰撞能量的Am级的防撞等级要求;各项碰撞安全性能指标均符合现行规范的要求;随碰撞角度的增大,车体重心3向加速度并非线性增大,而是纵向加速度基本不变、横向加速度先增大后减小、而竖向加速度线性增加的变化规律.
To alleviate the resulting increase in energy consumption and emissions and other issues caused by the traffic congestion ahead of the expressway toll station, a novel traffic flowcontrol method is put forward based on the environment-friendly conception. The technical thinking of inducing the slowly moving traffic into a batch pass is determined based on the conclusion of the research, traffic flowtheory and traffic sensing detection technology. The model of stop times is established and the parameters of the system are optimized in accordance with the principle of minimizing the fuel consumption. The optimal location selection of traffic control lights and Detector 2 for queue of different lengths at toll stations are calculated based on the model. Finally, the effect of the congestion flowcontrol system is verified via the Paramics simulation system. The result shows that the control system is capable of reducing90% of fuel consumption for vehicles going through toll stations.
