Application of Targeted Energy Transfer (TET) Techniques to the Seismic Protection of a Small Scale Multistorey Eccentric Steel Structure

• DOI: 10.1115/detc2011-48923
• Publication Date: 2012-06-13T22:30:25Z
• Authors: Concetta Tripepi; Francesco Nucera; Lawrence A. Bergman; D. Michael McFarland; Alexander F. Vakakis
• Keywords: Robustness; Earthquake shaking table

The aim of this work is to show that possible apply the Nonlinear Energy Sink (NES) concept protect seismically excited eccentric steel structures through Targeted Transfer (TET). We consider, as primary (linear) system, a small-scale four-storey unsymmetrical-plan building, modeled twelve-degree-of-freedom-system, with floors sufficiently rigid so frame can reasonably be considered shear-type and additional mass for each floor. To we connect two NESs, which are non-smooth precisely vibro-impact devices (VI-NESs), both placed on top In order analyze dynamics controlled model (structure VI-NESs), study performance robustness augmented structure by set Eurocode8 (EC8) spectrum compliant earthquakes. Our purpose check effectiveness VI-NESs different earthquake excitations, is, testing an optimal VI-NES setting computed specific will still produce satisfactory results other nonlinear attachments capable engaging in transient resonance linear modes at arbitrary frequencies generating one-way irreversible (on average) transfer energy vibration from local attachment. There confined locally dissipated without “spreading” back main because instantaneous internal resonance. As decreases due damping conditions Transient Resonance Capture (TRC) fail escape capture takes place.