Abstract: The aim of this paper is trying to reveal and compare the standard highway loading both specified in Chinese and U. S. Codes. It includes lateral distribution coefficient of live load, impact coefficient as well as reduction coefficient due to more than one lane. Taking the span length from 15m to 45m with 5 main girders in simply supported girder bridge, with bridge with of 7m. The maximum moment and shear at support are computed in each case. By means of Chinese and U. S. Codes of the trucks and the trailers, the computed results, the interrelations can be drawn. Finally, the conclusive suggestions are presented for reference only.

摘要： 本文目的是对中美两国规定的公路桥梁标准荷载进行对比与计算,包括荷载横向分布系数、冲击系数、车道析减系数规定的探讨。然后采用跨径l=15m,20m,25m,30m,35m,40m,45m的五片主梁的简支梁桥,桥宽净7,按中、美两国的汽车与挂车标准计算跨中最大弯矩与支点最大剪力(反力),分析计算结果找出内在联系与规律。最后,对我国与美国公路桥梁标准荷载与规范规定提出几点看法,仅供修订时参考。