【摘要】 根据国道110上的现状车辆荷载统计数据,讨论了其包含大量超载车及大量普通车辆的概率分布特性。各类常用的单峰分布皆不可用于描述这种车辆荷载。该文用两个正态分布加权和的双峰型概率分布描述车辆荷载,用滤过复合Possion过程和滤过复合Erlang更新过程分别表示一般运行和密集运行状态下的车辆荷载过程。得出基于后续使用期主车和重车荷载最大值分布的0.95分位值作为桥梁评估荷载。更多还原

【Abstract】 The distribution of the vehicle loads on the No.110 Chinese National Highway, which contains a large number of overloaded trucks along with the normal vehicles, was analyzed statistically to determine bridge design loads. The traditional single peak probability distributions cannot appropriately describe the actual vehicle loads. This paper presents a bimodal distribution, with two peaks, as the weighted sum of two normal distributions to describe the vehicle loads. A filtered composite Poisson process and a filtered composite Erlang renewal process were developed to describe the dense and normal traffic states of the stochastic vehicle loads consisting of both overloaded trucks and normal vehicles. The 0.95 fractiles of the maximum distributions of both overloaded trucks and normal vehicles are proposed as the evaluation loads of highway bridges.更多还原