Dynamic identification of an innovative technology building

This paper concerns the structural identification of an innovative manufacturing and assembling building technology system allowing fast times to build up. The building has been subjected to an experimental investigation and to an accurate FEM modeling. The experimental investigation has been carried out using a vibrodyne. The comparison between the experimental evidences with the results of finite element models allowed us the dynamic identification of the structure. The experimental modal analysis is a kind of test in which input forces and structural responses are known. It is important to note that the dynamic behavior is a kind of "fingerprint", in fact it depends only by intrinsic characteristics (mass, stiffness, damping, boundaries, degree of freedom, etc.) and not by the applied loads. Therefore, the structural response still remains unchanged in absence of modification (structural damage, etc.), otherwise a variation of frequencies and vibration modes occurs. The dynamic structural identification is a non-destructive technique, so that it can be applied to new structures (for monitoring the construction phases), to existing and even historical buildings (for checking the health) and to innovative structures (where there is not well defined design criteria).