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车辆荷载是影响公路桥梁结构安全性和使用性的重要因素,作为一种新型公路,目前尚无关于轻型高速公路桥梁车辆荷载的系统研究,为了解我国轻型车辆荷载的情况,首先确定了在混合交通动态称重数据中选取轻型车辆的筛选标准,并对筛选所得的轻型车辆荷载数据进行了概率统计分析,分析表明我国公路上行驶的轻型车辆总体服从对数正态分布,前期研究确定的总重指标符合实际情况;另外,为给轻型高速公路桥梁荷载标准的制定提供依据,还对密集运行状态的轻型车队荷载效应进行了计算,与公路—Ⅰ级进行了比较,并对大量的计算结果进行了统计分析,结果表明轻型车队荷载效应服从正态分布,可选择0.4倍的公路—Ⅰ级荷载作为轻型高速公路桥梁的荷载标准。
As a new type of highway, there is no systematic study on the load of bridges on light-expressways. To understand the load of light-weight vehicles in our country, it is first determined that in the process of mixing The selection criteria of light vehicles in traffic dynamic weighing data were analyzed. Probabilistic statistical analysis on the light vehicle load data obtained from the screening showed that the light vehicles on the highway in our country obeyed the logarithmic normal distribution generally. The total In addition, in order to provide the basis for the light-highway bridge load standard formulation, the load effect of light-duty fleet in intensive operation condition is also calculated, which is compared with Highway -Ⅰ, and a large number of calculation results A statistical analysis was carried out. The results showed that the load effect of light-duty vehicles obeys the normal distribution, and 0.4 times of highway-I load can be chosen as the load standard of light-highway bridges.