人造卫星定位系统在桥梁结构健康监测系统中的应用——以香港悬索体系桥梁为例

Application of GPS in the Bridge Structural Health Monitoring System in the Cable-Supported Bridges in Hong Kong

为增强桥梁结构的健康监测工作,香港特别行政区政府路政署将GPS应用于青马大桥、汲水门大桥、汀九大桥的健康监测系统中,其主要任务是测量4座悬吊体系桥梁、桥身和桥塔瞬间位移,进而推算其相应的导量(截面中线)位移及各相应主要构件的应力状况。该文主要介绍路政署于青马管制区内所安装的GPS监测系统,并对有关GPS信息在桥梁结构健康监测中的应用,如风力效应监测,温度效应监测,交通荷载效应监测和各主要构件的应力监测等进行介绍,最后对监测结果进行分析和评估。

The Highways Department of the Hong Kong Special Administrative Region has used the Global Positioning System （ GPS ） technology in the bridge structural health monitoring system in order to enhance and improve the bridge structural health monitoring works in the Tsing Ma bridge, Kap Shiu Mun bridge,Ting Kau bridge and Stonecutters bridge.The major task for the use of GPS is to measure the real time movements of the bridge decks and towers of these four bridges so that the corresponding displacements of the bridge deck centre lines and the stress conditions of the corresponding major components can be evaluated. The paper describes the GPS installed in the Tsing Ma Control Area of the highways department.It also discusses the application of the information from the GPS for the use of bridge structural health monitoring, such as wind effect monitoring, temperature effect monitoring, traffic load effect monitoring, and stress monitoring of major components ere.Some analysis results of the monitoring are presented.