车辆荷载下多车道横向折减系数的计算和分析

发布时间：2018-04-16 12:05

本文选题：桥梁工程 + 车辆荷载　；参考：《公路交通科技》2017年06期

【摘要】：根据近几年我国主要干道的车辆荷载实测数据,对不同测点的车辆总重进行了统计分析,建立了不同测点车辆荷载的总体概率模型及截尾概率模型。在此基础上,采用概率方法对车辆荷载服从非正态分布的多车道横向折减系数进行了计算和分析,给出多车道横向折减系数建议值,并与规范规定的数值进行对比。结果表明:不同测点车辆荷载的总体概率分布服从多峰分布,概率密度函数可用1个对数正态和3个正态概率密度的加权和表示;左截尾概率分布服从对数正态分布。设计基准期内最大值的概率分布服从对数正态分布。车辆荷载按多峰分布计算的三车道、四车道、五车道、六车道、七车道、八车道横向折减系数分别为0.95,0.85,0.78,0.74,0.73,0.69,车辆荷载按截尾分布计算的三车道、四车道、五车道、六车道、七车道、八车道横向折减系数分别为0.86,0.73,0.62,0.57,0.56,0.50,均不小于《公路桥涵设计通用规范》规定的数值。
[Abstract]:According to the measured data of vehicle load on main roads in China in recent years, the total vehicle weight at different measuring points is analyzed statistically, and the total probability model and truncated probability model of vehicle load at different measuring points are established.On this basis, the probability method is used to calculate and analyze the multi-lane transverse reduction coefficient of vehicle load clothing from non-normal distribution, and the suggested value of the multi-lane transverse reduction coefficient is given, and compared with the value specified in the code.The results show that the total probability distribution of vehicle load at different measuring points can be represented by multi-peak distribution, the probability density function can be expressed by the weighted sum of one logarithmic normal and three normal probability densities, and the left truncated probability distribution is from the logarithmic normal distribution.The probability distribution of the maximum value in the design reference period is derived from the logarithmic normal distribution.The transverse reduction coefficient of vehicle load calculated according to multi-peak distribution is 0.95U 0.85U 0.78U 0.78U 0.74N 0.730.69, and the three lanes, four lanes, five lanes, six lanes, seven lanes, seven lanes, seven lanes, and seven lanes are calculated according to the distribution of vehicle loads.The transverse reduction coefficient of the eight lanes is 0.86 / 0. 73 / 0.62 / 0. 57 / 0. 56 / 0. 50, which is not less than the value specified in the General Code for Highway Bridge and culvert Design.
【作者单位】：辽宁工程技术大学土木与交通学院;锦州市开发区财政投资评审中心;
【分类号】：U441.2

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