Assessment of Dissipated Energy to Harmonic Cycles of Displacement for Visco-Elastic Elastomeric Anti-Seismic Insulators
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2012, Vol 9, Issue 2
Abstract
The paper presents some results of the research carried out to highlight the dissipation capacity of the elastomeric systems to harmonic deformations due to the kinematic excitations of the exterior harmonic displacements type. Thus, the test procedure is regulated by the provisions from SR EN 1337/3 and SR EN 15129 related to the bearings, respectively anti-seismic devices LDRB, HDRB. The laboratory test bench is characterized by the fact that the harmonic cycles tests are carried out, in parallel, for a group of two elastomeric devices stressed to shearing. Since the dynamic and physical model is without added mass, the linear equation rules the entire dissipation and deformation process, expressed both by adequate physical quantities and representative diagrams. Depending on the discrete variation of the excitation frequency, the modification of the surface and slope of the loops in ellipse form is tracked, i.e. the hysteretic behaviour which does not depend on the excitation frequency, achieving one limit loop.
Authors and Affiliations
Polidor BRATU, Ovidiu VASILE
Keywords
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