Structural safety control of concrete dams aided by automated monitoring systems

The activities related to the safety control of concrete dams have a preventive purpose, to make it possible to take timely decisions to prevent or minimise the consequence of abnormal behaviour. In the safety control of dams aided by automated monitoring systems, the analysis of a large quantity of data may still become a difficult task. However, the continuous evolution of technologies in terms of processing information provides improvements related to the analysis of large quantities of data. On the one hand, it is intended to ensure the safety control in real time, but on the other hand, human ability to process data information is limited. The need to review procedures of suitable data analysis for information extraction has become an important aspect for timely decision making. For these reasons, it is fundamental to provide to the entities responsible for dam safety a management information system to allow data access, interpretation of the information and decision making, as quickly as possible. In this context, the main purpose of this dissertation is the definition of new methodologies to: i) improve the reliability of the measured data provided by automated data acquisition system, through the implementation of a quality control routine for the validation of the data measured, taking into account the measurement uncertainty of the measurement systems; ii) improve the routines related to data analysis and its interpretation by proposing the use of data-based methodologies in order: to support the decision of which physical quantities should be automated, to quantify the daily air temperature effect on the structural response, and to allow the pattern recognition of the dam behaviour; iii) the decision rules definition for early warnings related to the identification of abnormal behaviour and of a potential failure scenario. The implementation of the proposed methodologies in an information management support system is possible, thus being a solid step for the improvement of structural dam safety control in real time.

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