TY - JOUR
T1 - Analysis-oriented model for concrete and masonry confined with fiber reinforced mortar
AU - Cascardi, Alessio
AU - Aiello, Maria Antonietta
AU - Triantafillou, Thanasis
N1 - Funding Information:
This research was supported by the COST Action TU1207 “Next Generation Design Guidelines for Composites in Construction”. The authors are grateful to the Chair of the Action, Dr. Maurizio Guadagnini, and the whole COST Action Network for the financial support.
Publisher Copyright:
© 2017, RILEM.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Analysis-oriented model (AOM) is a theoretical approach intended to analyze and design systems by applying the notions throughout the organization of a series of equations in one or more iterative cycle. The stress–strain curve of an fiber reinforced polymer (FRP) confined column is evaluated using an incremental procedure, which takes into account the interaction between the confining material and the column itself. Many AOMs have been developed for FRP-confined columns, while the prediction of the behavior of the jacketing with fiber reinforced mortar (FRM) is, currently, still a lack of the literature due to the relative recent development of studies about this new confining composite material. The aim of this paper is to present and discuss a new AOM able to deliver the axial stress–strain law of an axially loaded column made of concrete or masonry and with circular or square cross-section, when FRM-confinement is provided. A step-by-step iteration of the axial strain was adopted considering that the column reacts elastically and the FRM confinement remains un-cracked in each single step. The elastic secant modulus of the column was, thereafter, considered in order to catch its non-linear behavior and a further secant modulus was also computed for modelling the damage evolution of the FRM confinement when increasing the axial load. Finally, a parametric study allowed to check the correct interpretation of the phenomenon. Moreover, the theoretical versus the experimental comparison validated the accuracy of the proposed model.
AB - Analysis-oriented model (AOM) is a theoretical approach intended to analyze and design systems by applying the notions throughout the organization of a series of equations in one or more iterative cycle. The stress–strain curve of an fiber reinforced polymer (FRP) confined column is evaluated using an incremental procedure, which takes into account the interaction between the confining material and the column itself. Many AOMs have been developed for FRP-confined columns, while the prediction of the behavior of the jacketing with fiber reinforced mortar (FRM) is, currently, still a lack of the literature due to the relative recent development of studies about this new confining composite material. The aim of this paper is to present and discuss a new AOM able to deliver the axial stress–strain law of an axially loaded column made of concrete or masonry and with circular or square cross-section, when FRM-confinement is provided. A step-by-step iteration of the axial strain was adopted considering that the column reacts elastically and the FRM confinement remains un-cracked in each single step. The elastic secant modulus of the column was, thereafter, considered in order to catch its non-linear behavior and a further secant modulus was also computed for modelling the damage evolution of the FRM confinement when increasing the axial load. Finally, a parametric study allowed to check the correct interpretation of the phenomenon. Moreover, the theoretical versus the experimental comparison validated the accuracy of the proposed model.
KW - Analysis-oriented model
KW - Concrete
KW - Confinement
KW - Fiber reinforced mortar (FRM)
KW - Masonry
UR - http://www.scopus.com/inward/record.url?scp=85025122621&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85025122621&partnerID=8YFLogxK
U2 - 10.1617/s11527-017-1072-0
DO - 10.1617/s11527-017-1072-0
M3 - Article
AN - SCOPUS:85025122621
SN - 1359-5997
VL - 50
JO - Materials and Structures/Materiaux et Constructions
JF - Materials and Structures/Materiaux et Constructions
IS - 4
M1 - 202
ER -