Dear Colleagues,

Bridge structures play a vital role in human daily life and social activities. Due to limitations of the technological development level, management level and the effect of adverse environmental factors, the problems of safety and usability of bridge structure are gradually exposed during the whole life cycle of the structure. Bridge health monitoring data provides important information about the mechanical characteristics and structural health condition of bridges. Therefore, deformation, cable force, strain and other indicators are the key parameters to assess the operational condition of bridges in structural health monitoring system. In practical engineering, the operation condition evaluation of bridge structure is mainly based on the index signal caused by load. At the same time, the structural responses are not only related to the characteristics of the structure, but also highly susceptible to the environmental factors, such as wind, humidity, temperature, and so on. The different signals collected by structural health monitoring system are the result of mixing and superposition under multiple loads (such as moving load, concrete shrinkage and creep, temperature load, etc.).

Therefore, separating the various environmental factors to obtain the indicator changes caused by loads from the bridge health monitoring data, which has important scientific research significance and engineering application value for accurately grasping the bridge health state and predicting the evolution trend of structural behavior.