Demand for monitoring systems applied to structures for quality assurance and for evaluating seismic risk is stronger than ever. Here, a monitoring systems to assess structural integrity was developed in which the damage-detection strategy uses two newly developed methods to first identify the damage sites globally (i.e., detect whether the damage occurred or not, and detect the story level) and to then evaluate the damage sites locally. One method identifies the sites and extent of damage globally by using an improved MDLAC (Multiple Damage Location Assurance Criterion) method by using modal data (i.e., frequency and mode shape), and the other identifies the damage sites locally by using wave propagation. Results showed that these two methods are practical and effective in assessing structural integrity of a structure for seismic safety.
A "smart" structure has many functions, including monitoring, repairing, shape formation, and learning. Recently, interest in applying a monitoring system to a structure for quality assurance and for evaluating seismic risk has been strong. Monitoring system is useful to diagnose the structural condition and detect structural damage and degradation. In this study, we developed a monitoring system to assess the structural integrity of a structure. This system includes a diagnostic system for structural damage and degradation based on mode parameters and wave propagation. The damage detection strategy is to first detect the damage sites globally by using an improved MDLAC (Multiple Damage Location Assurance Criterion) method, and then to evaluate the damage sites locally by using wave propagation. As a result, it is pointed out that there is a possibility to confirm the diagnostic system by utilizing these two methods.
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