基于桥梁结构安全可靠性的车辆载重限值研究

Study of Vehicle Load Limit Permit Truck Weight Based on Bridge Structure Safety and Reliability

针对运营阶段桥梁汽车荷载限载管理问题,开展基于安全可靠性的车辆载重限值分析方法研究。通过实测车辆荷载数据统计,分析现阶段载重车辆类型及其荷载分布特征。根据车型比例、车辆超载情况,以及各车型轴组配置对结构响应的影响,建立桥梁限载的典型车型谱系。以可靠性理论为基础,从结构安全角度,提出基于可靠度反问题的车辆载重限值分析方法和计算步骤。

In view of the problem of bridge vehicle load limit management in the operation stage,the analysis method of vehicle load limit based on the safety and reliability is studied.Based on the statistics of measured vehicle load data,the types and load distribution characteristics of load-carrying vehicles at this stage are analyzed.Based on the proportion of vehicle types,the overloading of vehicles,and the influence of each vehicle axle configuration on structural response,a typical vehicle pedigree of bridge load limit is established.Based on the reliability theory,from the perspective of structure safety,the analysis method and calculation procedure of vehicle load limit based on the inverse reliability problem are proposed.