基于动态称重的高速桥梁车辆荷载分析  

Analysis of Highway Bridge Traffic Load by a Weigh-in-Motion Approach

作　　者：卢颖[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《工业技术创新》2016年第5期953-955,共3页Industrial Technology Innovation

摘　　要：基于安装在高速某三跨连续梁桥上的动态称重系统(WIM)所记录的车辆荷载数据,对车流量、车重、车速、总轴距和车间距进行了分析,得到其统计特性和分布的一般规律。然后,通过广义极值模型(GEV)计算出最大弯矩极值分布,得出实际车辆荷载,并与规范中所规定的荷载进行比较。结果表明:一天中各时段的总交通流量具有很强的潮汐规律性;从车流构成上看,二轴车辆占绝大多数,其次为六轴及以上车辆;实际运行车辆荷载低于设计车辆荷载,实际荷载对桥梁健康状况危害不大。Basing on data recorded by the Weigh-in-Motion(WIM) system installed in a three span continuous girder bridge at highway, perform analysis of the vehicle flow, weight, speed, wheelbase and interval, as to discover general discipline of their statistical characteristics and distribution. Then, the Generalized Extreme Value(GEV) model is used to calculate the extreme value distribution of maximum bending moment. The actual vehicle load is compared with the load determined by the regulations. The results show that, traffic flow has a strong tidal regularity; from the aspect of flow composition, dual-axle dominates the largest part, and the six-axle or more dominate the secondary. The actual running vehicle load is lower than the designed, thus brings out little harm to bridge healthy status.

关 键 词：桥梁 车辆荷载 车流构成 动态称重 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]