Axial Behavior of Slender-Concrete-Filled FRP-Tube Columns Reinforced With Steel and Carbon-FRP Bars

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Title: Axial Behavior of Slender-Concrete-Filled FRP-Tube Columns Reinforced With Steel and Carbon-FRP Bars

Author(s): Radhouane Masmoudi and Hamdy Mohamed

Publication: Special Publication

Volume: 275

Issue:

Appears on pages(s): 1-20

Keywords: CFFT, Slenderness Ratio; Columns; Reinforced Concrete, Glass-FRP tube; Carbon-FRP bars

Date: 3/1/2011

Abstract:
This paper presents the results of an experimental investigation on the strength and behavior of thirteen RC and CFFT columns. The effects of two parameters and their interactions on the buckling behavior were investigated; namely, the type of internal reinforcement (steel or CFRP bars) and the slenderness ratio. CFFT 152 mm, (6 in.)-diameter columns with different slenderness ratios 4, 8, 12, 16 and 20, were tested under pure compression load. Filament-winded FRP tubes with 2.65 mm (0.10 in.) thickness were used as a stay-in-place structural formwork for the CFFT columns. The axial compressive capacity of steel and CFRP-reinforced CFFT columns was reduced by 13% to 32% with increasing the slenderness ratio from 4 to 20. The behavior of CFRP bars as a compression reinforcement was generally similar to conventional steel bars. The test results indicated that the axial capacity of CFRP-reinforced CFFT columns is 13% lower compared to steel-reinforced CFFT columns.