Abstract
This paper presents statistical analysis of vehicle loads, which were measured by Weighing in Motion (WIM). The vehicle composition, distribution of gross vehicle weight (GVW) and load distribution of classified vehicles are obtained; Axle load proportions and wheelbases of different type of vehicles are also statistically analyzed. Based on statistic theory of extreme value distribution, characteristic values of different type of vehicle loads within design reference period are deduced. The analysis results can be used for safety evaluation of road pavements, bridges and culverts in the expressway, and can be as a reference for both design load formulation and overloading control of bridges.
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