Bratu P.

The paper treats the matter of the systems intended to isolate and damp vibrations transmitted to constructions due to the seismic actions, vibrations and shocks resulted from urban traffic. In this context some elastic systems intended for construction passive isolation are analysed. For the above mentioned systems specific rigidity and damping parameters are established making difference between the individual isolating element and the entire isolating system. Basing on these researches one can conclude that the systemic approach regarding the element arrangement, complex dynamic analysis and the technical construction are determinant factors in order to establish an efficient passive isolation solution. The paper also presents the rigidity variation curves for three types of engineering solutions designated for the passive isolation with rubber elements as well as the modality to modify the damping as a function of the system elements combination. Finally, experimental results obtained for isolating elements manufactured of rubber in various mounting configurations subjected to simple (compression/share) or compound loads are presented.