THE ASSESSMENT OF THE DYNAMIC RESPONSE TO SEISMIC EXCITATION FOR CONSTRUCTIONS EQUIPPED WITH BASE ISOLATION SYSTEMS ACCORDING TO THE NEWTON-VOIGT-KELVIN MODEL

Polidor BRATU, Adriana STUPARU, Sorin POPA, Nicolae IACOB, Ovidiu VOICU

Abstract


The paper presents the results of the researches carried out for constructions base isolation technical solutions using rheological dissipative elastic devices modelled as a viscous-elastic compound system. In this context, there are analysed the conditions for the achievement of an equivalent viscous-elastic connection, based on the coupling of elastic and viscous devices in a Newton-Voigt-Kelvin structure. On this basis, the dynamic analysis highlights the level of the dynamic response by the significant amplitudes of the instantaneous displacements to the dominant spectral frequency of the seismic excitation. In the end, there are presented the parametric variation curves which allow the assessment of the dynamic isolation level and the efficiency of the viscous–elastic link, used as a base isolation system for construction (buildings, bridges, viaducts) located in seismic prone areas.

Key words: antiseismic isolation, dynamic response, rheological models, Newton-Voigt-Kelvin


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References


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