eprintid: 1932
rev_number: 9
eprint_status: archive
userid: 56
dir: disk0/00/00/19/32
datestamp: 2013-11-22 11:53:51
lastmod: 2014-10-09 09:20:26
status_changed: 2013-11-22 11:53:51
type: book_section
metadata_visibility: show
creators_name: Lacidogna, Giuseppe
creators_name: Paggi, Marco
creators_name: Carpinteri, Alberto
creators_id: 
creators_id: marco.paggi@imtlucca.it
creators_id: 
title: Delamination in FRP-strengthened structures: acoustic emission monitoring and numerical modeling
ispublished: pub
subjects: TJ
divisions: CSA
full_text_status: none
keywords: FRP retrofitting; Delamination; Creep; Acoustic Emission; Finite Elements; Seismicity
note: 17th AIMETA Congress of Theoretical and Applied Mechanics, Firenze, Italy, September 11-15, 2005
abstract: A case study concerning both numerical modeling and in-situ monitoring of a retrofitted RC beam
with non-rectangular cross-section is presented. Before retrofitting, non-destructive techniques,
such as pull-out and impact tests, were used to estimate the mechanical parameters of concrete. At
the same time, a long-term monitoring with the Acoustic Emission (AE) technique was carried out
in order to investigate on creep effects and microcracking phenomena. Then, after a complete
removal of the overload and retrofitting with FRP sheets, an in-situ loading test was performed. At
that stage, the AE technique was again profitably used for the analysis of the cracking progression
leading to FRP debonding. A numerical model of the structure is then proposed in the framework
of the FE discretization with mechanical parameters estimated according to an inverse analysis on
the monitored mechanical behavior of the structure before retrofitting. According to this model, it
is clearly demonstrated that, when the flexural inertia of the retrofitted beam is considerably
higher than that of the unrepaired beam, snap-back instabilities can take place. Finally,
considering the self-similarity between the acoustic emission phenomenon and seismicity, an
analogy between the snap-back instability of the FRP delamination and that occurring during fault
growth is proposed.
date: 2005
publisher: Firenze University Press
refereed: TRUE
isbn: 88-8453-313-9
book_title: AIMETA 2005 : atti del XVII Congresso dell’Associazione italiana di meccanica teorica e applicata : Firenze, 11-15 settembre 2005
related_url_url: http://digital.casalini.it/8884533139
citation:   Lacidogna, Giuseppe and Paggi, Marco and Carpinteri, Alberto  Delamination in FRP-strengthened structures: acoustic emission monitoring and numerical modeling.   In:  AIMETA 2005 : atti del XVII Congresso dell’Associazione italiana di meccanica teorica e applicata : Firenze, 11-15 settembre 2005.   Firenze University Press.  ISBN 88-8453-313-9      (2005)