收费广场交通流特性对桥梁结构的影响

高速公路收费广场位于桥梁结构上，须考虑收费广场交通流特性对桥梁结构的影响，主要体现在车辆活载、桥梁横向分布系数、纵向车队间距及车辆制动力发生变化而引起的汽车荷载分布模式、结构受力等方面与原结构设计的不同．以福州秀宅收费站搬迁工程为例，收费广场的车辆荷载效应高于公路一I级标准的活载效应，收费广场的桥梁结构不能采用原设计荷载标准，必须重拟桥梁荷载标准．

The Effect of Traffic Flow of Toll Plaza on Bridge Structure

In toll plaza of expressway on bridge structure the traffic flow effect on bridge should be considered, which is mainly reflected in the following aspects ： vehicles live load, bridge transverse distribution coefficient, vertical fleet distance and vehicles braking force, those may be caused by the difference of load distribution pattern and structure stress from the original structure design. A case study of Fuzhou Xiuzhai toll station relocation, the vehicles load effect of toll plaza is higher than the standard of Highway-/grade, so the bridge structure of toll effect shouldn＇ t adopt the original design standard and draft new bridge design standard.