Investigation of temperature-effect separation of monitoring data for large-span suspension bridges

The Ministry of Transport has arranged and implemented numerous health monitoring systems for long and large bridges in Guizhou in recent years. Bridge safety duration may be estimated and residual bearing capacity can be estimated using the monitoring data that these systems gather. To more accurately evaluate the structural changes utilizing the bridge structure data, the association between the temperature, strain, and structural deformation data is investigated. The temperature influence is then separated out using the wavelet transform theory. The results show that there is very little variation in the surface temperature of steel truss beam constructions and the surrounding air during the winter months when solar radiation is low. Bridge supports' longitudinal deformation, vertical deformation, and structural strain are all significantly impacted by temperature.The main beam's longitudinal deformation and temperature have a stronger link with one another than they do with vertical deformation.The effects of temperature variations on bridge structural reactions can be efficiently eliminated by using wavelet transform to structural monitoring data for denoising, which enables the extraction of structural responses under vehicle loads. This makes it easier to analyze how the bridge structure will react to loads.