大跨径铁路拱辅梁桥健康监测研究

以新建兰渝铁路广元嘉陵江双线特大桥为例,根据大跨径铁路桥拱辅梁桥的结构特点,介绍了当前铁路桥梁结构健康监测的现状和不足。通过对桥梁结构健康监测系统的组成、结构和功能的研究,以影响铁路桥梁结构响应的动、静力参数为依据,对铁路桥梁健康监测系统中传感器的选型和布设方面进行了设计和优化,并给出了该桥健康监测系统传感器优化组合的算例,为同类型的大跨径铁路拱辅梁桥的健康监测设计提供参考。

Health Monitoring of Long-Span Railway Arch-Auxiliary Girder Bridge

On the basis of newly-built Guangyuan Jialing River super long-span double-line railway bridge on Lan-Yu Railway,the present situation and shortages of the BHM system was introduced,according to the characteristics of long-span railway arch auxiliary girder bridges.By the researches on the components,structures and functions of the BHM system basing on static and dynamic force parameters,which influence the bridge structure responses,a computational example of the sensors' optimal design in the BHM system was proposed to design and optimize the sensors' selection and layout.The computational example provides a reference for the same type of long-span railway arch auxiliary girder bridge health monitoring design.