路面载重车辆的荷载特征

Loading Characteristics for Trucks Operating on Highway

在收集了我国公路上行驶的单、双后轴整车型的载重车辆轴载资料的基础上,参考国家现行轴限规定与轮胎型号等标准,从路面结构设计的角度上对轴载、轮胎气压、接地压力、轴型参数等荷载特征参数进行了整理分析,采用统计回归方法找到了特征参数的规律和相互关系,进而提出了供路面结构设计的轴型参数:双轮间距、轮距、轴距按额定轴载进行分级的建议表,以及以后轴额定轴载和轴载实载率为自变参量的轮胎接地压力的统一回归式和回归系数,讨论了现行沥青路面结构分析中双轮中心距取3倍荷载当量圆半径宜根据额定轴载和轴载实载率确定适用范围。此研究结果为提高路面结构分析精度提供了可靠的荷载特征参数依据。

The authors studied the relation between loading characteristics of trucks and pavement structure design, through analyzing the collected axle load data for single and double rear axle of straight trucks on national highway, in the light of the existing standards of axle load limit and tire type etc, taking into account of loading characteristics parameters, axle load, tire pressure and axle type etc to find out their co-relations with regression analysis. Based on the study axle type parameters used for pavement design including dual wheel spacing, wheel gauge, wheelbase according to the grade of rated load are proposed in form of table, with independent variable of the rating axle load and factual load factor, regres^d coefliciems and formula for tire contact pressure, at the same time, according to the rated axle load and factual load factor, the applicability of equivalent load radius equals to trinal distance between dual wheel centers in present asphalt pavement structure analysis is discussed.The research resultants can provide reliable truck loading characteristic parameters to improve the accuracy of pavement structure analysis.