某鱼脊连续梁桥行车安全性分析

摘要

Driving safety in the Dazhi River Bridge is analyzed by using numerical wind tunnel method in the paper, and wind velocity of safety driving is presented. The Dazhi River Bridge is designed to be prestressed concrete continuous beam bridge with herringbone shape, and driving safety on the bridge may be affected by the herringbone beam. The influence of herringbone beam on the force of moving vehicles is analyzed by the commercial computational fluid dynamics software, FLUENT firstly. And then, the values of wind velocity for safety driving on the bridge with different surface features are suggested based on the target of no sideslip. Finally, the requirements for maintenance management in terms of safety driving are provided according to the current standards.%　　采用数值风洞方法，对大治河桥上车辆的行车安全进行了分析，给出合理的安全行车风速。大治河桥总体布置采用预应力混凝土鱼脊连续梁桥，鱼脊的设置对桥面上车辆的行驶安全性产生了一定的影响。首先，采用通用计算流体动力学软件 FLUENT 分析了鱼脊对行驶车辆受力的影响；其次，以车辆不发生侧滑为指标，给出了大治河桥在不同桥面特征下的安全行车风速标准；最后，根据现行标准给出了大治河桥在安全行车方面的管养要求。