ABSTRACT
Structural Health Monitoring (SHM) has become a powerful tool to help decision making for management of structures along their service life. Estimation of parameters from dynamic response is more appealing than doing it from static response for abundant dynamic database. The aim of this paper is to propose a new dynamic Structural System Identification (SSI) methodology, using subsets of masses, natural frequencies and modal shapes to perform SSI combined with the observability method (OM) and the constrained observability method (COM), for its one-time calculation by solving just one objective function. New algorithms are introduced and one example using experimental data is used as a proof of concept to verify its feasibility. Last, a large structure is used to show the potential of the practical application of the proposed methodology. It turns out with this new methodology, unknown bending stiffness of the structure can be determined efficiently using modal information.
