A structural health monitoring system has been deployed in monitoring and evaluating the structural performance of cable-supported bridges in Hong Kong, i.e. Tsing Ma (suspension) Bridge, Kap Shui Mun (cable-stayed) Bridge and Ting Kau (cable-stayed) Bridge. This system is named as Wind And Structural Health Monitoring System (WASHMS) and is composed of four sub-systems, namely, Sensory System, Data Acquisition System, Data Processing and Analysis System, and Computer for System Operation and Control. This paper first briefly introduces the layout and operation of WASHMS, then presents some typical monitoring results such as wind, temperature, traffic and bridge responses obtained in past two years. These results will than be compared with design values for evaluating the current loading and health conditions of the bridges.
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