Calibration of a structural health monitoring system for multiple-isolated structures using the dynamic response

The paper analyses the dynamic response of multiple base-isolated structures with the aim of accurately calibrating and selecting the sensor sensitivities for their structural monitoring. A first approach is devoted to the development of an analytical simple model composed by linear-superstructures posed on a common nonlinear base isolation system. The dynamic response of such model subjected to stochastic dynamic excitation will be evaluated through an iterative linearization procedure based on the determination of the covariance matrix. The results give an indication of the acceleration level induced on the isolated structures induced by environmental noise. Instead, the prediction of the seismic response will be assessed through a numerical algorithm dedicated to the nonlinear dynamic analysis of multiple building base isolated structures (3DBASIS-M). The fusion of all results will be useful to better identify the features of the accelerometer sensors on the basis of defined objective. The methodology will be applied to a preliminary design of a permanent seismic monitoring system for the real case of the Department of Human Science Building belonging to the University of L’Aquila