eprintid: 1977
rev_number: 6
eprint_status: archive
userid: 56
dir: disk0/00/00/19/77
datestamp: 2013-11-29 13:35:55
lastmod: 2014-10-09 09:20:25
status_changed: 2013-11-29 13:35:55
type: article
metadata_visibility: show
creators_name: Carpinteri, Alberto
creators_name: Corrado, Mauro
creators_name: Mancini, Giuseppe
creators_name: Paggi, Marco
creators_id: 
creators_id: 
creators_id: 
creators_id: marco.paggi@imtlucca.it
title: A numerical approach to modelling size effects on the flexural ductility of RC beams
ispublished: pub
subjects: TJ
divisions: CSA
full_text_status: none
keywords: Plastic rotation; Ductility; Overlapping Crack Model; Crushing; Cohesive Crack Model; Size-scale effects; Reinforced concrete; Nonlinear analysis
abstract: The problem of evaluating the rotation capacity of reinforced concrete (RC) beams in bending has been largely investigated from both the experimental and the analytical point of view during the last decades. Since the development of ductility is influenced by several design parameters, it is difficult to develop a predictive model that can fully describe the mechanical behaviour of RC beams. In particular, the role of the size-scale effect, which has been evidenced by some experimental tests, is not yet completely understood. One of the main reasons is the inadequacy of the traditional models based on ad hoc stress–strain constitutive laws. In the present paper, a new model based on the concept of strain localization is proposed, which is able to describe both cracking and crushing growths in RC beams during the loading process. In particular, the nonlinear behaviour of concrete in compression is modelled by the Overlapping Crack Model, which describes the strain localization due to crushing by means of a material interpenetration. With this algorithm in hand, it is possible to effectively capture the flexural behaviour of RC beams by varying the reinforcement percentage and/or the beam depth. An extensive comparison with experimental results demonstrates the effectiveness of the proposed approach.
date: 2009
date_type: published
publication: Materials and Structures
volume: 42
number: 10
publisher: Springer-Verlag
pagerange: 1353-1367
id_number: 10.1617/s11527-008-9454-y
refereed: TRUE
issn: 1359-5997
official_url: http://dx.doi.org/10.1617/s11527-008-9454-y
citation:   Carpinteri, Alberto and Corrado, Mauro and Mancini, Giuseppe and Paggi, Marco  A numerical approach to modelling size effects on the flexural ductility of RC beams.  Materials and Structures, 42 (10).  pp. 1353-1367.  ISSN 1359-5997      (2009)