eprintid: 1575846
rev_number: 24
eprint_status: archive
userid: 608
dir: disk0/01/57/58/46
datestamp: 2017-10-01 01:55:37
lastmod: 2020-02-12 16:14:28
status_changed: 2018-01-24 14:55:30
type: proceedings_section
metadata_visibility: show
creators_name: Tubaldi, E
creators_name: Freddi, F
creators_name: Zona, A
creators_name: Dall'Asta, A
title: Seismic performance of structural systems equipped with buckling-restrained braces
ispublished: inpress
divisions: UCL
divisions: A01
divisions: B04
divisions: C05
divisions: F44
keywords: Buckling-restrained braces, dual systems, cumulative ductility, residual displacement, seismic
performance.
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Buckling-restrained braces (BRBs) are often employed for the seismic retrofit of existing systems and the design of
new systems given their significant contribution in terms of stiffness and added damping. However, since BRBs are
characterized by a low lateral post-elastic stiffness, their use may lead to excessive residual deformations that may
jeopardize the reparability of the building. Moreover, accumulation of plastic deformations in the BRBs may
endanger the capability of withstanding multiple earthquakes and aftershocks. The objective of this paper is to
provide insight into the performance and residual capacity of dual systems made of BRB frames coupled with
moment-resisting frames. This study considers a simplified single degree of freedom model which permits to
investigate a wide range of configurations. A non-dimensional formulation of the equation of motion is introduced,
the statistic of the normalized peak and residual displacements and cumulative ductility of the system is evaluated
under a set of ground motion records. Different values of the BRB target maximum ductility and different coupled
frame properties are considered. The results of this study provide useful information for the preliminary design of
dual systems made of BRB frames coupled with moment-resisting frames.
date: 2017-09-21
date_type: published
publisher: ANIDIS
official_url: http://convegno.anidis.it/index.php/anidis/2017
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1424080
lyricists_name: Freddi, Fabio
lyricists_id: FFRED33
actors_name: Dewerpe, Marie
actors_id: MDDEW97
actors_role: owner
full_text_status: public
place_of_pub: Pistoia, Italy
event_title: XVII National Conference ANIDIS, L'Ingegneria sismica in Italia
event_location: Pistoia, Italy
event_dates: 17 September 2017 - 21 September 2017
institution: XVII National Conference ANIDIS, L'Ingegneria sismica in Italia
book_title: Proceedings of XVII National Conference ANIDIS, L'Ingegneria sismica in Italia
citation:        Tubaldi, E;    Freddi, F;    Zona, A;    Dall'Asta, A;      (2017)    Seismic performance of structural systems equipped with buckling-restrained braces.                     In:  Proceedings of XVII National Conference ANIDIS, L'Ingegneria sismica in Italia.    ANIDIS: Pistoia, Italy.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1575846/1/Freddi_et%20al.%202017_ANIDIS_Seismic%20performance%20of%20structural%20systems%20equipped%20with%20buckling-restrained%20braces%20-%20Submitted.pdf