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本文提出了一种新型的路面设计荷载图式——碗形分布荷载。与世界各国传统采用的均布荷载图式相比,碗形分布荷载的应力计算结果更为合理,荷载分布图形与实测的轮胎压力分布图形也更为接近。由于在单向水平碗形分布荷载作用下,弹性层状体系表面荷载边缘处应力计算值不再出现无限大,因而碗形分布荷载的提出为柔性路面设计与计算中能同时考虑垂直荷载和水平荷载的复合作用展示了有希望的前景。
This paper presents a new type of pavement design load pattern--bowl-shaped distributed loads. Comparing with the uniform load patterns traditionally used in the countries of the world, the calculated stress of the bowl-shaped distributed load is more reasonable, and the load distribution pattern and the measured tire pressure distribution pattern are also closer. Due to the unidirectional horizontal bowl-shaped distributed loads, the calculated stress values at the edge of the surface of the elastic layered system no longer appear infinity. Therefore, the proposed bowl-shaped distributed load can consider the vertical load and level simultaneously for the design and calculation of flexible pavements. The composite effect of loads shows promising prospects.