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为获取重型交通荷载特性以及重车过桥全过程造成的荷载效应,收集了美国加州两座重工业区桥梁以及我国新疆自治区一座公路桥梁WIM数据,利用美国联邦政府超重车规定提取了其中超重荷载样本,对超重车辆类型及分布等进行统计分析.基于随机过程理论提出了考虑多车道车辆并行荷载效应计算模型,利用WIM数据中的动态信息还原车辆间相对位置,计算其产生的叠加荷载效应,并与公路I级设计荷载对应效应进行对比.结果表明,超重车引起的荷载效应较规范值大,且跨长越长,重车并行叠加荷载效应越突出.
In order to obtain the heavy traffic load characteristics and the load effect caused by the heavy truck crossing the whole process, the WIM data of two heavy industrial parks in California, USA and one highway bridge in Xinjiang Autonomous Region of China were collected and the overloaded load samples , The type and distribution of overweight vehicles were statistically analyzed.Based on stochastic process theory, the parallel load effect calculation model considering multi-lane vehicles was put forward, and the relative position between vehicles was restored by using the dynamic information in WIM data to calculate the additive load effect The results show that the load effect caused by overweight vehicles is larger than the normative value, and the longer the span length, the more prominent the parallel load effect of heavy vehicles is.