Performance Enhancement of Steel Columns Using Concrete-Filled Composite Jackets

Karimi, Kian; El‐Dakhakhni, Wael; Tait, Michael J.

doi:10.1061/(asce)cf.1943-5509.0000162

Cited by 30 publications

(19 citation statements)

References 28 publications

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“…It should be noted that the same boundary conditions have been commonly adopted in compression tests of hybrid columns (e.g. [21][22]). For each specimen, two linear variable displacement transducers (LVDTs) placed 180° apart from each other were used to measure the overall axial shortening.…”

Section: Test Set-up and Instrumentationmentioning

confidence: 99%

FRP-confined concrete-encased cross-shaped steel columns: Concept and behaviour

Huang

Zhang

et al. 2017

Engineering Structures

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FRP-confined concrete-encased cross-shaped steel columns (FCCSCs) are a new form of hybrid columns recently developed at the University of Wollongong. An FCCSC consists of a square FRP outer tube, a cross-shaped steel section and concrete filled in between. This sectional configuration ensures that the concrete is very effectively confined despite the square shape of the column. In addition, the crossshaped steel section serves as the ductile longitudinal reinforcement for loads in the two lateral directions and its possible buckling is constrained by the FRP outer tube and the concrete, leading to a column that is highly ductile. In this paper, results from a series of stub column tests are presented to demonstrate the concept of the new column form. The experimental program involved the testing of FCCSC specimens as well as four types of similar column forms, namely, square FRP-confined plain concrete columns (SFCPCs), circular FRP-confined plain concrete columns (CFCPCs), concrete-encased cross-shaped steel columns and square plain concrete columns. The test results confirmed the excellent performance of FCCSCs. The test results also showed that compared with the concrete in SFCPCs and that in CFCPCs, the concrete in FCCSCs has a much larger ultimate axial strain and a larger compressive strength, when the same FRP tube is used.

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Section: Test Set-up and Instrumentationmentioning

confidence: 99%

FRP-confined concrete-encased cross-shaped steel columns: Concept and behaviour

Huang

Zhang

et al. 2017

Engineering Structures

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“…In conventional reinforced concrete structures, the lateral confinement to the compressed concrete is mainly provided by the transverse steel reinforcement in the form of either spirals or hoops. Concrete-filled steel tubular columns, which have been widely used in high-rise buildings, bridges, etc., are also utilizing the increased strength and deformability of confined concrete to achieve a high structural performance [3,4]. In such a composite column, an outer steel tube is used to replace longitudinal and transverse steel reinforcements in conventional reinforced concrete columns and to provide continuous confinement to concrete infilled.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Short FRP-Confined Concrete-Encased Arbitrarily Shaped Steel Columns under Biaxial Loading

2018

International Journal of Polymer Science

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The FRP-confined concrete-encased steel column is a new form of hybrid column, which integrates advantages of all the constituent materials. Its structural performance, including load carrying capacity, ductility, and corrosion resistance, has been demonstrated to be excellent by limited experimental investigation. Currently, no systematic procedure, particularly for that with reinforced structural steel of arbitrary shapes, has been proposed for the sectional analysis and design for such novel hybrid columns under biaxial loading. The present paper aims at filling this research gap by proposing an approach for the rapid section analysis and providing rationale basis for FRP-confined concrete-encased arbitrarily shaped steel columns. A robust iterative scheme has been used with a traditional so-called fiber element method. The presented numerical examples demonstrated the validity and accuracy of the proposed approach.

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“…In recent years, fiber-reinforced polymer (FRP) composites have found increasingly wide applications in civil engineering, both in the retrofit of existing structures and in new construction [1][2][3][4]. In particular, FRP has been widely accepted as an efficient confining material for concrete because of its high strength-to-weight ratio and tailorability in mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…The high strength-to-weight ratio translates into lighter/smaller components for installation, while the tailorability of FRP composites means that they can be designed to possess only a small axial stiffness so that their confinement effectiveness is not compromised by buckling due to substantial axial compressive stresses. Therefore, the use of FRP tubes as a confining device and a corrosion-resistant skin for concrete columns has been extensively explored for new construction [1,4]. Examples of FRP-confined concrete columns include (a) concrete-filled FRP tubes (CFFTs) with or without longitudinal reinforcement by steel bars (e.g., [5][6][7][8][9][10][11]); (b) hybrid FRP-concrete-steel double-skin tubular columns (DSTCs) (e.g., [1,[12][13][14][15][16]) and (c) FRP-confined concrete-filled steel tubes (CCFTs) (e.g., [17][18][19][20]) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al [21] tested five FCSC specimens where FRP wraps were used and the steel sections in all specimens were notched to simulate the loss of section due to corrosion. Karimi and co-researchers [4,22,23] recently conducted experimental studies on the compressive behavior of FCSCs either using pre-fabricated FRP tubes for circular columns or FRP wraps for rectangular columns. Zakaib and Fam [24] conducted an experimental study on the flexural performance and moment connection of FCSCs with pre-fabricated FRP tubes.…”

Section: Introductionmentioning

confidence: 99%

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Compressive behavior of FRP-confined concrete-encased steel columns

Lin

Zhang

2016

Composite Structures

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FRP-confined concrete-encased steel I-section columns (FCSCs) are an emerging form of hybrid columns. An FCSC consists of an outer FRP tube, an encased steel section and a concrete infill. The FCSCs possess many advantages over conventional reinforced concrete columns, including the excellent corrosion resistance, excellent ductility and ease for construction. Existing studies on FCSCs, however, have been rather limited. This paper presents a combined experimental and theoretical study on the behavior of FCSCs under concentric and eccentric compression. The experimental program included the testing of a total of 14 specimens, with the main variables being the section configuration, the thickness of the FRP tube and the loading scheme. The theoretical part included the development of a model for section analysis based on the so-called fiber element approach. The test results showed that the buckling of steel section was well constrained and the concrete was effectively confined in FCSCs, leading to a very ductile response under both concentric and eccentric compression. The theoretical model was shown to provide reasonably accurate predictions of the test results.

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Performance Enhancement of Steel Columns Using Concrete-Filled Composite Jackets

Cited by 30 publications

References 28 publications

FRP-confined concrete-encased cross-shaped steel columns: Concept and behaviour

FRP-confined concrete-encased cross-shaped steel columns: Concept and behaviour

Analysis and Design of Short FRP-Confined Concrete-Encased Arbitrarily Shaped Steel Columns under Biaxial Loading

Compressive behavior of FRP-confined concrete-encased steel columns

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