RESEARCH ARTICLE


Seismic Upgrading of Steel Moment-Resisting Frames by Means of Friction Devices



Esra Mete Güneyisi1, Mario D'Aniello*, 1, Raffaele Landolfo2
1 Department of Civil Engineering, University of Gaziantep, 27310, Gaziantep, Turkey
2 Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Naples, Italy


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Creative Commons License
© 2014 Güneyisi et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Naples, Italy; Tel: (+39) 081.2538917; E-mail: mdaniel@unina.it


Abstract

In recent decades, several passive energy dissipation systems have been conceived in order to minimize the damage in structural and non-structural components of either new or existing buildings. In this study, the use of friction damped tension-compression diagonal braces for seismic upgrading of a steel moment resisting frames is investigated. To this aim, nonlinear time history analyses have been carried out on a set of representative frames with and without friction damped braces. In the nonlinear time history analyses, two sets of natural accelerograms compatible with seismic hazard levels of 10% and 2% probability of exceedance in 50 years have been considered. Under these records, the structural response has been comparatively investigated in terms of the maximum inter-storey drift ratio, maximum storey acceleration, residual drift ratio and displacement demand for the friction device. The results clearly highlighted that the application of friction damped braces allows reducing the damages to the main structural elements, thus significantly improving the seismic behaviour of the frame.

Keywords: Friction device, nonlinear time history analysis, passive energy dissipation systems, seismic response, steel frame.