Experimental study on CFST members strengthened by CFRP composites under compression

Sundarraja, M.C.; Prabhu, G. Ganesh

doi:10.1016/j.jcsr.2011.10.014

Cited by 77 publications

(19 citation statements)

References 9 publications

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“…Although Xiao's work [9] was directed at new construction, the same concept can be applied in the strengthening/retrofit of CFSTs: FRP wrapping provides a simple and effective method to enhance the load-carrying capacity and/or ductility of CFSTs, which is similar to the FRP wrapping for strengthening RC columns [6,149]. Following Xiao's initial work [9], a number of studies have been conducted by Xiao and associates [10,150,151] as well as other researchers [152][153][154][155][156][157][158][159][160] on the effectiveness of FRP wrapping in improving the structural behavior of both circular [10,[151][152][153][154][155] and square/rectangular CFSTs [150,153,154,156].…”

Section: Frp Confinement Of Concrete-filled Steel Tubesmentioning

confidence: 99%

Strengthening of steel structures with fiber-reinforced polymer composites

Teng

Fernando

2012

Journal of Constructional Steel Research

493

179

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Section: Frp Confinement Of Concrete-filled Steel Tubesmentioning

confidence: 99%

Strengthening of steel structures with fiber-reinforced polymer composites

Teng

Fernando

2012

Journal of Constructional Steel Research

493

179

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“…The behavior of the concrete was significantly enhanced by the FRP confinement. Sundarraja and Prabhu [8] investigated CFST columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets or CFRP strips. The CFRP layer number and the width and spacing of the strips were studied.…”

Section: Introductionmentioning

confidence: 99%

Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

2014

Polymers

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This paper presents the results of an experimental study into the behavior of concrete-filled steel tube columns confined by fiber-reinforced polymer (FRP). Eleven columns were tested to investigate the effects of the FRP layer number, the thickness of the steel tube and concrete strength on their load capacity and axial deformation capacity. The experimental results indicated that the FRP wrap can effectively confine the concrete expansion and delay the local buckling of the steel tube. Both the load capacity and the axial deformation capacity of concrete-filled steel tube columns can be substantially enhanced with FRP confinement. A model is proposed to predict the load capacity of the FRP-confined concrete-filled steel tube columns. The predicted results are generally in good agreement with the experimental ones obtained in this study and in the literature.

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“…This stress type causes too difficult or impossible maintenance requirements [11]. The more number of carbon fibre wrap usage were enhanced the axial deformation capacity as well as compressive strength [12]. Geometrical shape, compressive strength of concrete and thickness of steel tube have also serious effect on CFST members within the stress -strain characteristics [10].…”

Section: Introductionmentioning

confidence: 99%

08.57: The friction investigation of CFRP confined CFST specimens with modified concrete

Evirgen

Tuncan

2017

ce papers

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Nowadays, concrete filled steel tube (CFST) composite members have in wide range application areas such as transverse beams, piers, slender columns, stub columns, wind turbines etc. around the world. The frictional behavior between concrete and steel tube has a vital role in selection of required size and materials during the laboratory experiments, in-situ applications and modelling studies. In this study, 16 CFST members were subjected to push out tests within the aim of determination the effect of carbon fibres reinforced polymer (CFRP) confinement and modified concrete at the same time. Modified concrete indicates some mechanical additives are inside the concrete for instance steel fibres, polypropylene fibres and crumb rubber. Furthermore, external CFRP confinement was applied with three different arrangements on the outside circumference of the steel tube. Frictional stress created on the lateral interaction surface ranges between 0.18 MPa and 0.63 MPa due to maximum striping force. Maximum frictional strength was observed on the unconfined reference concrete. Although CFRP application seriously increased the axial strength of composite sections, this process decreases the frictional strength between concrete and steel tube, unexpectedly. Therefore, considering different frictional coefficient emerges as a foregone conclusion during the design procedure of CFRP confined CFST sections.

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Experimental study on CFST members strengthened by CFRP composites under compression

Cited by 77 publications

References 9 publications

Strengthening of steel structures with fiber-reinforced polymer composites

Strengthening of steel structures with fiber-reinforced polymer composites

Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

08.57: The friction investigation of CFRP confined CFST specimens with modified concrete

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