ABSTRACT
A major glued segmental box girder bridge constructed in prestressed concrete by the balanced cantilever method has been extensively instrumented for the measurement of temperature and temperature induced strain. Approximately 120 thermocouples and strain gauges were embedded in the concrete during construction at a single midspan crosssection. Temperatures and strain have been recorded at hourly intervals for a period of two years using a computer controlled data acquisition system. This has enabled the diurnal effects of temperature change to be evaluated throughout the different seasons. Telephonic telemetry was installed to enable the data acquisition system in the bridge to be interrogated remotely from the office. In this way data was only collected for subsequent interpretation and evaluation during extreme weather conditions. More recently a satellite telemetry system has been installed to evaluate its performance as a technique for remotely controlling data acquisition.
