DIBRAST: A Computer-Aided Seismic Design Procedure for Frame Structures Equipped With Hysteretic Devices

Nuzzo, Iolanda; Ciliento, Francesca; Caterino, Nicola

doi:10.3389/fbuil.2020.00013

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…In parallel to the development of the hardware, viable design procedures and configurations of dissipative bracing systems incorporating metallic dampers have been envisaged for the seismic retrofitting of existing r.c and steel buildings (Akcelyan et al 2016;Barbagallo et al 2017;Bergami et al 2013;Di Cesare et al 2017a;Durucan et al 2010;Mazza et al 2015a;2015b;2016a, b;Nuzzo et al 2019;O'Reilly et al 2016;Gandelli et al 2019;Mohammadi et Al. 2019) and for new constructions with different materials (Quintana et al 2020;Nuzzo et al 2020;Granello et al 2020;Ponzo et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Cyclic engagement of hysteretic steel dampers in braced buildings: a parametric investigation

Gandelli

Domenico

Quaglini

2021

Bull Earthquake Eng

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Hysteretic steel dampers have been effectively used to improve the seismic performance of framed buildings by confining the dissipation of seismic energy into sacrifical, replaceable devices which are not part of the gravity framing system. The number of cycles sustained by the dampers during the earthquake is a primary design parameter, since it can be associated to low-cycle fatigue, with ensuing degradation of the mechanical properties and potential failure of the system. Current standards, like e.g. the European code EN 15129, indeed prescribe, for the initial qualification and the production control of hysteretic steel dampers, cyclic tests in which the devices are assessed over ten cycles with amplitude equal to the seismic design displacement dbd. This paper presents a parametric study focused on the number of effective cycles of the damper during a design earthquake in order to assess the reliability of the testing procedure proposed by the standards. The study considers typical applications of hysteretic steel dampers in low and medium-rise steel and reinforced concrete framed buildings and different ductility requirements. The results point out that the cyclic engagement of the damper is primarily affected by the fundamental period of the braced building and the design spectrum, and that, depending on these parameters, the actual number of cycles can be substantially smaller or larger that recommended by the standards. A more refined criterion for establishing the number of cycles to be implemented in testing protocols is eventually formulated.

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