Construction of Initial Analytical Models for Structural Health Monitoring

초록

It is important to accurately predict structural responses to external excitations such as typhoon, earthquake, etc. for designing structures in serviceability and ultimate levels. One of key procedure to predict reliable vibration responses it to evaluate accurate structural dynamic properties using finite element (FE) models which properly represent buildings' realistic behaviors. In case of the historical masonry buildings, structural damages could be also caused by due to the ambient vibrations or impacts. Preservation plans, therefore, of the historic buildings for low level vibrations or impacts should be provided by analyzing structural damages within serviceability level. For this purpose, it is required to provide FE model construction and response analysis methods verified with field measurement data. In this research, long-term field measurement was performed for a cathedral and its dynamic properties are evaluated using measured data. Then, it is calibrated based on the measured dynamic properties and overall construction method of FE models for masonry cathedral is proposed. Using the measured accelerations, the vibrations of the belfry were analyzed using the calibrated FE model and finally, the FE model for the cathedral were be verified by comparing the measured accelerations with the analyzed results of the FE model.