桥梁测力支座监测系统设计与工程应用

桥梁测力支座及相应的监测系统可用于桥梁的健康监测,在普通球型钢支座基础上开发的一种新型桥梁测力支座,通过在支座内部设置测力结构,采用先进的传感器,外部配置数据传输系统实现实时测力及对桥梁施工和运营状态的远程监控。本文介绍了支座和监测系统的结构形式及工作机理,通过试验测定并在沪昆客专北盘江大桥得到工程应用。结果表明:提出的支座结构形式新颖,受力和传力机理明确,经试验室测试数据重复性好,性能稳定;选用的传感器及配套的数据传输系统性能良好,工艺成熟,输出信号稳定准确;研究成果可以监测桥梁结构的施工和运营状态,也可纳入桥梁健康监测系统,亦可供新制式轨道交通桥梁支座监测系统设计参考。

Design and Engineering Application of Monitoring System of Force-measuring Bearing for Bridges

The force-measuring bearing for bridges and its corresponding monitoring system can be used for bridge health monitoring.A new type of force-measuring bearing for bridges developed on the basis of ordinary spherical steel bearing can realize real-time force measurement and remote monitoring of bridge construction and operation status by setting force measuring structure inside the bearing,with advanced sensors and an external data transmission system.This paper introduces the structure and working mechanism of the bearing and monitoring system,which has been tested and applied in the Beipan River Bridge of Shanghai-Kunming Passenger Dedicated Line.The results show that the structure of the bearing is novel,the mechanism of stress and force transmission is clear,the repeatability of data tested in the laboratory is good,and the performance is stable;the selected sensor and supporting data transmission system have good performance,mature technology,and stable and accurate output signal;the research results can either be used to monitor the construction and operation status of bridge structures,or be incorporated into the bridge health monitoring system,and can also be used as a reference for the design of the monitoring system for the bearings of the new rail transit bridge.