Nuevo disipador para edificación sismorresistente. 1ª parte: caracterización y modelos de predicción

Dissipator for building protection. Part I: behavior and prediction models

A new energy dissipator, based on yielding of steel under shear response, has been developed and recently tested. It is H shaped and web stiffened. Yielding main part is mechanized from one piece of rectangular shaped steel bar. Its conception let obtain thin and well-stiffened web cross sections without welded parts. Main experimentally obtained characteristics are a yielding point near 0.5 mm of displacement, yielding loads between 14 kN and 20 kN and a dissipated energy, before damage appears in the web, from 10 kJ to 21 kJ. All tested specimens have developed large deformations without web buckling. When web degradation appears, flanges and stiffeners keep dissipating an important amount of energy. Proposed numerical models and simple mathematical expressions offer well correlated results when compared to the experimental ones.