基于现场调查与非参数估计的干线公路荷载特性研究

Study on Vehicle Loading Characteristics of Arterial Highway Based on Traffic Survey and Non-parameter Estimation

针对干线公路上行驶的大型汽车和重型汽车数量的增加,对公路桥梁造成的损害不断加剧,不仅增加了桥梁的维护成本,也造成了干线公路通行能力和服务水平降低的问题。选取对桥梁结构有较大影响的车辆轴重,在河南省高速公路主线收费站通过对大型货车轴重进行调查统计,利用核估计法建立了干线公路车辆轴重统计模型。分析结果表明,目前干线公路以大型、重型货车为主的公路荷载已经远远超出了公路荷载标准上限值,需要根据现有的车流状况计算干线公路桥梁结构承载力及可靠性,并制订符合实际的地方性荷载标准作为国家标准的补充。

As the increasing of large vehicles and heavy duty vehicles on the domestic arterial highway,the damages to the highway bridges are growing.This not only increased the bridge maintenance costs,but also affected the highway capacity and service.The axle weights which have greater impact on the bridge life were selected,based on the survey statistics of large trucks passed throuth the expressway toll stations in Henan Province,the statistical model for collecting the data of axle weights of vehicles passed throuth arterial highway was established by the method of kernal estimation.The analytic result shows that（1） the present highway vehicle loading which mainly from large and heavy duty trucks has far exceeded the upper limit of the related standards;（2） it is necessary to calculate the bearing capacities and reliabilities of arterial highway bridges based on the current vehicle flow,and also develop the realistic regional loading standards as the complement of national standards.