不同车辆模型作用下混凝土简支T梁桥的动态称重研究

Study on Bridge Weigh-in-Motion of Concrete Simple-Supported T-Beam Bridge Under the Action of Different Vehicle Models

为了解不同车辆模型作用下桥梁动态称重(BWIM)技术的识别效果,针对典型混凝土简支T梁桥在两种不同车辆模型作用下的识别效果展开研究,分别识别了两种车辆模型作用下的车辆行驶速度、轴距、车辆轴重和总重,并且计算分析了不同路面不平整度、车辆行驶速度等因素对车重识别精度的影响。结果表明:五轴车轴距和车辆总重的识别精度优于三轴车;路面不平整度越差,两种车型的轴重和总重识别误差均越大,因此实际工程中定期维护路面可以有效保障动态称重系统精度;车辆行驶速度增大,两种车辆模型的车辆轴重和总重的识别误差均增大,说明该称重系统对于中低速行驶的车辆重量识别适用性优于高速行驶车辆。

In order to understand the identification effect of bridge weigh-in-motion(BWIM)technology under the action of different vehicle models,the identification effect of a typical concrete simply-supported T-beam bridge under the action of two different vehicle models were studied.The vehicle speed,wheelbase,vehicle axle load,and total weight under the action of the two vehicle models were identified respectively.And the influence of different road surface unevenness,vehicle speed,and other factors on the vehicle weight recognition accuracy was calculated and analyzed.The results show that the recognition accuracy of the wheelbase and the total weight of the five-axle vehicle are better than those of the three-axle vehicle.The worse the road surface roughness was,the greater the identification errors of the axle weight and the total weight of the two types of vehicles were,so regular maintenance of the road surface in actual engineering can effectively guarantee the accuracy of the BWIM system.As the vehicle speed increases,the recognition errors of the vehicle axle load and the total weight of the two vehicle models increase,indicating that the BWIM system has better applicability for vehicle weight recognition at medium and low speeds.