基于实测的高速公路重载交通轴载分析

通过调查京沪高速公路沂淮江段动态称重系统的交通轴载数据,研究了该路段交通荷载参数、货车的超载情况以及交通轴载谱。根据分析结果提出了以单轴双轮120 k N作为高速公路重载交通沥青路面的设计轴载、轮胎接地压强0.85 MPa为设计荷载;发现用正态分布模型表征该路段单轴双轮轴载谱(R~2=0.95),能够比较真实地反映该路段的荷载特性,提出以该模型作为随机荷载的加载方案;并使用简化的荷载分布作为室内试验进行变幅荷载的加载方案。

Analysis Based on Measured Traffic Load of Heavy-loaded Traffic Highway

Through collecting the traffic load data of the weigh-in-motion system from Xinyi to Jiangdu on the Beijing-Shanghai highway. After study and analysis the traffic load parameters, overload condition of truck, and the Traffic axle load spectrum of the road section. The results show that use of 120 kN and 0.85 MPa as design of axial load and design load for asphalt roadbed of highway under heavy-duty traffic. Then a normal distribution model could truly reflect the traffic load which characteristics correlation coefficient is 0.95 was proposed to be the stochastic assignment model and characterize axle load spectrum of uniaxial two-wheel. Finally, a load distribution was compiled to be the varying amplitude loading scheme for laboratory experiment.