Resumen

JAIMES, Miguel A.; NINO, Mauro  y  GODINEZ, Francisco A.. Seismic fragility of weak first-story rc structures with clutching inerter dampers subjected to narrow-band seismic excitations. Ing. sísm [online]. 2024, n.113, pp.26-54.  Epub 07-Mar-2025. ISSN 0185-092X.  https://doi.org/10.18867/ris.113.639.

This study evaluates the seismic fragility of weak first-story reinforced concrete (RC) structures retrofitted with clutching inerter dampers (CID) at their ground level when subjected to narrow-band seismic excitations. The main advantages brought about by the ground-level clutching inerters are the reductions in seismic demands (e.g., drifts, floor accelerations). This study shows that structures with inerters are reliable systems in terms of peak story drifts for large ground motions. The reliabilities of structures with inerter dampers at their ground level are in general higher for buildings under seismic intensities associated to incipient collapse limit states, especially for low-height buildings. The findings of this study could guide practicing engineers to use clutching inerter-based dampers in retrofitting ductile structures consisting of moment-resisting (RC) frames subjected to narrow-band earthquake excitations in regions such as Mexico City.

Palabras llave : clutching inerter dampers; rotational inertia; clutch; weak first story; seismic excitations; narrow band; seismic fragility; mitigation; seismic demand; México.

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