考虑多车道行车效应的车辆荷载外推方法研究
A study on extrapolation method for vehicle load on highway bridges with multiple lanes

以随机过程理论为基础，利用实测动态称重数据建立随机过程模型，考虑多车道多辆车并行效应，提出一种新的车辆荷载效应计算方法，定义了误差检验指标. 同时，以经典极值理论为基础，提出短时段的车辆数据外推基准期内荷载预期值的方法. 误差检验指标计算表明，该方法外推荷载效应非常接近实测值，比NCHRP方法的相对误差小，可为桥梁活荷载取值计算提供有益的参考.
In this study，a new mathematic model was proposed based on the random process for the calculation of vehicle load effects，in which，the multiple load effects of vehicle running on different lanes can be obtained using available real vehicle weight data obtained from weigh-in-motion technique. In addition，a new extrapolation method was proposed based on classic extreme value theory to estimate their projection to bridge life-cycle by the usage of short-term data，and the calculation of the error index verifies its reliability comparing with NCHRP method. Hopefully，this approach could provide a beneficial reference to calculation of live-load on bridges