Resumen

JAIMES, Miguel A.  y  GODINEZ, Francisco A.. Effectiveness of particle dampers in buildings subjected to narrow-band seismic excitations. Ing. sísm [online]. 2024, n.113, pp.115-133.  Epub 07-Mar-2025. ISSN 0185-092X.  https://doi.org/10.18867/ris.113.617.

This numerical study evaluates the effectiveness of Particle Dampers (PDs) on buildings, which are capable of reducing the lateral response of the primary structural system when subjected to narrow-band seismic excitations. First, the seismic response for maximum displacement of a single-degree-of-freedom (SDOF) system was studied for three configurations, namely: 1) a SDOF system without damper; 2) a SDOF system with Tuned Mass Damper (TMD) and 3) a SDOF system with PD. Then, the response of 11-storey and 17-storey three-bay linear frames with PD, TMD and without them are analyzed under narrow-band seismic motions. Results indicated that the main advantage of a PD is the significant reduction of floor accelerations and lateral displacements when the ratio between the predominant frequency of the ground earthquake excitation and the predominant frequency of the building is close to unity and the first mode of the frame becomes dominant. It is essential to carry out an experimental validation and contrast of these findings, so that engineers can consider the feasibility of implementing PDs in structures exposed to narrow-band seismic excitations, as is the case in Mexico City.

Palabras llave : structures with particle dampers; narrow-band seismic excitations; displacement demand; Mexico City earthquakes.

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