eprintid: 1575835
rev_number: 25
eprint_status: archive
userid: 608
dir: disk0/01/57/58/35
datestamp: 2017-10-01 01:55:29
lastmod: 2020-02-12 16:14:22
status_changed: 2018-03-22 16:01:08
type: proceedings_section
metadata_visibility: show
creators_name: Freddi, F
creators_name: Tubaldi, E
creators_name: Dall'Asta, A
creators_name: Ragni, L
title: Local and Global Response Parameters in Seismic Risk Assessment of RC Frames Retrofitted by BRBs
divisions: UCL
divisions: A01
divisions: B04
divisions: C05
divisions: F44
keywords: Reinforced Concrete Frames, Fragility, Vulnerability Assessment, Seismic Retrofit, Dissipative Braces
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: This paper deals with the seismic performance and risk assessment of existing reinforced concrete (RC) buildings
with limited ductility retrofitted by means of buckling restrained braces (BRBs). Two different approaches for
evaluating the seismic vulnerability and risk before and after retrofit are introduced and analyzed. These
approaches involve the use of different categories of engineering demand parameters (EDPs) for the system
response assessment: global EDPs, that permit to obtain a synthetic description of the system behavior at a reduced
computational cost, and local EDPs, more accurate in describing the response of the frame elements and of the
BRBs, though more demanding from a computational point of view. The effect of the EDPs choice is analyzed by
considering a two-dimensional RC frame designed for gravity-loads only as case study. The frame is retrofitted by
introducing elasto-plastic dissipative braces designed for different levels of base shear capacity. The results of the
study show that the use of global EDPs leads to a significant overestimation of the retrofit effectiveness in terms of
both vulnerability and risk reduction. If a risk-based design is carried out for the retrofit system, braces with
significantly lower dimensions are obtained by using global EDPs instead of local EDPs.
date: 2013
date_type: published
official_url: http://www.anidis.it/
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1424068
lyricists_name: Freddi, Fabio
lyricists_id: FFRED33
full_text_status: public
event_title: ANIDIS 2013 - XV Convegno, 30 June 2013 – 4 July 2013, Padova, Italy
event_location: Padova, Italy
event_dates: 30 June 2013 - 04 July 2013
institution: XV National Conference ANIDIS, L'Ingegneria sismica in Italia
editors_name: Modena, C
citation:        Freddi, F;    Tubaldi, E;    Dall'Asta, A;    Ragni, L;      (2013)    Local and Global Response Parameters in Seismic Risk Assessment of RC Frames Retrofitted by BRBs.                     In: Modena, C, (ed.)  (Proceedings) ANIDIS 2013 - XV Convegno, 30 June 2013 – 4 July 2013, Padova, Italy.          Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1575835/1/Freddi_Local_Global_Response_Parameters.pdf