TY - GEN
T1 - Investigation of bar buckling in columns confined with composite material jackets
AU - Bournas, Dionysios A.
AU - Triantafillou, T. C.
PY - 2011
Y1 - 2011
N2 - The onset and evolution of bar buckling at the plastic hinge of old-type reinforced concrete (RC) columns confined with composite material [textile-reinforced mortar (TRM) and fiber-reinforced polymer (FRP)] jackets was investigated experimentally and analytically in this study. The interaction between composite jacket (or concrete cover, for unconfined concrete) and embedded longitudinal compression reinforcement at the onset and evolution of bar buckling was achieved through strain measurements of the compression reinforcement. Moreover, the implementation of a stress-strain confinement model, which relates lateral with axial strains, allowed the description and monitoring of the axial-lateral strain relationship at the base of the columns throughout the evolution of bar buckling. Finally, based on the aforementioned confinement model and on the experimental measurements, the post-buckling behaviour of columns was related with the stiffness of the jacket.
AB - The onset and evolution of bar buckling at the plastic hinge of old-type reinforced concrete (RC) columns confined with composite material [textile-reinforced mortar (TRM) and fiber-reinforced polymer (FRP)] jackets was investigated experimentally and analytically in this study. The interaction between composite jacket (or concrete cover, for unconfined concrete) and embedded longitudinal compression reinforcement at the onset and evolution of bar buckling was achieved through strain measurements of the compression reinforcement. Moreover, the implementation of a stress-strain confinement model, which relates lateral with axial strains, allowed the description and monitoring of the axial-lateral strain relationship at the base of the columns throughout the evolution of bar buckling. Finally, based on the aforementioned confinement model and on the experimental measurements, the post-buckling behaviour of columns was related with the stiffness of the jacket.
KW - Bar buckling
KW - Confinement
KW - FRP
KW - Reinforced concrete
KW - Seismic retrofitting
KW - Textile-reinforced mortar (TRM)
UR - http://www.scopus.com/inward/record.url?scp=84856814649&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856814649&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84856814649
SN - 9781618392039
T3 - American Concrete Institute, ACI Special Publication
SP - 117
EP - 134
BT - 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10
T2 - 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10, in conjunction with the ACI Spring 2011 Convention
Y2 - 2 April 2011 through 4 April 2011
ER -