Generalized Analysis-oriented model of FRP confined concrete circular columns

Shayanfar, Javad, Barros, Joaquim A.O. and Rezazadeh, Mohammadali (2021) Generalized Analysis-oriented model of FRP confined concrete circular columns. Composite Structures, 270. p. 114026. ISSN 0263-8223

Generalized Analysis-oriented Model of FRP Confined Concrete.pdf - Accepted Version
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This study is dedicated to the development of a generalized confinement model applicable to circular concrete columns confined by FRP full and partial confinement arrangements. To simulate the axial stress versus strain curve, a new strength model is proposed addressing the relation of axial stress and confinement pressure during axial loading, whose calibration was based on an extensive set of test results. By combining theoretical basis and experimental observations, the influence of non-homogenous distribution of concrete transversal expansibility with full/partial confinement during axial compressive loading is taken into the account in the establishment of confinement stiffness index. To estimate the ultimate condition of FRP fully/partially confined concrete, a new model with a design framework is also developed. It is demonstrated that global axial stress-strain curves and also dilation responses simulated by the proposed confinement model are in good agreement with those registered experimentally in available literature, and provides better predictions in terms of ultimate axial stress/strain than the formulations proposed by design standards.

Item Type: Article
Additional Information: Funding Information: This study is a part of the project “StreColesf_Innovative technique using effectively composite materials for the strengthening of rectangular cross section reinforced concrete columns exposed to seismic loadings and fire”, with the reference POCI-01-0145-FEDER-029485. The firs author also acknowledges the support provided by FCT PhD individual fellowship 2019 with the reference of “SFRH/BD/148002/2019”.
Uncontrolled Keywords: FRP confined columns, FRP confinement, Axial behavior, Dilation behavior, 19 Confinement stiffness index
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 28 Jan 2022 09:46
Last Modified: 18 May 2022 03:31

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