Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36794
Title: Non-uniform stress distribution in FRP-wrapped circular concrete columns under uniform axial deformation
Authors: Li, SQ
Chen, JF
Yu, T
Teng, JG 
Keywords: circular
Wrapped
FRP
Distribution
Deformation
Stress
Axial
Uniform
Non
Under
Columns
Concrete
Issue Date: 2012
Source: Proceedings of the 6th International Conference on FRP Composites in Civil Engineering, Rome, Italy, 13-15 June 2012 (CD-ROM) How to cite?
Abstract: The confinement of concrete columns using bonded FRP wraps has become a popular retrofit technique. Through extensive research in the last two decades, many stress-strain models have been developed for concrete in FRP-wrapped circular columns. All these models assume that the stress state is axisymmetric in an FRP-wrapped circular concrete column under concentric axial compression. This implies that the FRP wrap is assumed to be axisymmetric in geometry, but in reality such axisymmetry is not realised due to the existence of an overlapping zone. This paper presents a finite element investigation into the stress state in FRP-wrapped circular concrete columns considering the actual FRP wrap geometry used in laboratory tests and practice. The results show that common FRP wraps with an overlapping zone can lead to significant non-axisymmetric confinement to the concrete and hence a significantly non-uniform stress distribution in the concrete, even when the concrete is under uniform axial shortening.
URI: http://hdl.handle.net/10397/36794
Appears in Collections:Conference Paper

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