Resumo

HERNANDEZ RAMIREZ, Héctor  e  TENA COLUNGA, Arturo. Assessment of a force method for the resilient seismic design of special moment-resisting steel frames with hysteretic energy dissipation devices. Ing. sísm [online]. 2018, n.98, pp.45-76. ISSN 0185-092X.  https://doi.org/10.18867/ris.98.495.

In this paper, the authors present the results of nonlinear dynamic analyses of twelve building models designed according to a methodology based upon the force method, capacity design principles and the concept of structural fuses to achieve resilient seismic designs for special moment-resisting steel frames with hysteretic energy dissipation devices mounted on chevron steel bracing. It is demonstrated that the resilient design mechanism previously checked with pushover analyses is also attained for most studied models with nonlinear dynamic analyses using an acceleration record which is compatible with the elastic design spectrum. Also, it is corroborated that the planned second line of inelastic defense is activated if the seismic action surpasses the considered design spectrum. Based upon the obtained results, it is confirmed that it is possible to perform a resilient seismic design for the studied system under the proposed methodology, even for tall and slender buildings. Therefore, the proposed initial stiffness ratio parameters and the global design parameters previously proposed by the authors to use in a code-oriented force method can be used with confidence for the resilient seismic design of this structural system.

Palavras-chave : resilient seismic design; hysteretic energy dissipation devices; structural fuses; ductile steel moment frames.

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