Mass, Stiffness and Damping Identification of a Two-Story Building Model

Abstract eng:
In this paper we propose the results of an experimental investigation addressed to identify mass, stiffness and damping matrices of a two-story building model. The goal of our research is to set up a quick procedure to design control laws for mitigating structural vibrations and/or detecting damage of structure itself. We placed on each floor a 4507 Bruel & Kjaer accelerometer connected to 6160 Bruel & Kjaer Pulse spectrum analyzer, then we excited the structure by 8202 Bruel & Kjaer impact hammer and through the recorded I/O data we identified the modal model. Once obtained the system modal parameters, we identified mass, stiffness and damping matrices of the structure. We are going to exploit these experimental results for designing a virtual passive controller. This apparatus is composed of an electric actuator placed on the top of the building connected to a NI-CompactRio System.

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