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

Huang, Le; Yu, Tao; Zhang, Shishun; Wang, Zhen Yu

doi:10.1016/j.engstruct.2017.09.011

Cited by 47 publications

(25 citation statements)

References 18 publications

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“…As shown in Figure 2 , the failure modes for specimens L0 and L1 were marked by rupturing of the FRP outer tube on the flat side at around mid-height of the specimens due to local stress concentration. Those results are similar to the test observations presented in [ 26 ]. It is of interest to mention that for specimens with slenderness ratios less than or equal to 16, the CFGT columns buckled just before the rupturing of the tube.…”

Section: Test Results and Discussionsupporting

confidence: 92%

Influences of Slenderness and Eccentricity on the Mechanical Properties of Concrete-Filled GFRP Tube Columns

et al. 2021

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The existence of either eccentricity or slenderness has a significant effect on the mechanical properties of a structure or member. These properties can change the working mechanism, failure mode, and bearing capacity of the structure or member. A concrete-filled, glass fibre-reinforced, polymer tube composite column has the same problem. We carried out experiments on the influences of eccentricity and slenderness on the mechanical properties of concrete-filled, glass fibre-reinforced, polymer tube composite columns. The experimentally recorded stress–strain relationships are presented graphically, and the ultimate axial stresses and strains and the FRP tube hoop strains at rupture were tabulated. The results indicate that the influences of slenderness and eccentricity on the composite columns were significant with regard to the axial strain, hoop strain, ultimate bearing capacity, lateral displacement, and failure mode. Based on the existing research literature and the results reported in this paper, the bearing capacity formula of a composite slender column under an eccentric load was established. The theoretical results were in good agreement with the experimental results.

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Section: Test Results and Discussionsupporting

confidence: 92%

Influences of Slenderness and Eccentricity on the Mechanical Properties of Concrete-Filled GFRP Tube Columns

et al. 2021

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“…So undoubtedly, the steel did not only provide the vertical load capacity and also the confinement for concrete. This was also tested by Huang et al (2017) in his study. Higher lateral and axial strains on steel could be observed with a thicker FRP tube.…”

Section: Behavior Of the Steels In Fsrcsmentioning

confidence: 90%

“…Usually, most studies (Ozbakkaloglu and Oehlers, 2008;Wang et al, 2012aWang et al, , 2016 argued the confinement is large in the corner but is small on the middle side in square FRP-confined concrete columns, as shown in Figure 1(a). Huang et al (2017) innovatively installed a cross-shaped steel into a square FRP-confined concrete columns as depicted in Figure 1(b). With the excellent corrosion resistance of FRP tubes, the concrete cover of the inner cross-shaped steel was eliminated in this study.…”

Section: Introductionmentioning

confidence: 99%

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Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns

Pei

Wang

et al. 2020

Advances in Structural Engineering

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Fiber-reinforced polymer tube–confined steel fiber–reinforced concrete column is a novel composite column proposed recently, which consists of a traditional steel-reinforced concrete column and an external glass fiber–reinforced plastic tube for lateral confinement. In order to investigate the axial compression behavior of steel fiber–reinforced concrete columns, a total of 16 square specimens were fabricated and tested under axial monotonic and cyclic compressive loading. Three different configurations of inner shaped steels, including cross-shaped, box-shaped with wielding, and box-shaped without wielding were considered. Two thicknesses of glass fiber–reinforced concrete tubes were also considered as the main experimental parameters. On the basis of test results, a thorough analysis of the failure process based on strain analysis was discussed. The test results showed that steel fiber–reinforced concrete columns exhibited higher ductility and load capacity compared with fiber-reinforced plastic–confined plain concrete columns. Two quantitative indexes were proposed to measure the confinement of steel fiber–reinforced concretes. The axial cyclic mechanical behaviors were discussed through comparative analysis with monotonic behaviors. The remnant strains and modulus of the cyclic behaviors were also discussed.

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“…Recently, Yu et al [17] presented a combined experimental and theoretical study on the behavior of FCSCs under concentric and eccentric compression and revealed that two flanges of H-shaped steel could provide additional confinement to infilled concrete thus enhancing the ductility and load carrying of the composite columns. In order to further enhance the confinement efficiency for FRP-confined concrete-encased steel composite square columns and inspired by Yu et al [17], Huang and his coauthors [18] innovatively proposed a new form of FCSCs, in which a cross-shaped steel section was used to replace H-shaped (or I-shaped) steel. Their test results demonstrated that despite concrete infill in square section, it was effectively confined by both outer tube and cross-shaped steel and justified the rationales of the proposed new form of composite columns.…”

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

Cited by 47 publications

References 18 publications

Influences of Slenderness and Eccentricity on the Mechanical Properties of Concrete-Filled GFRP Tube Columns

Influences of Slenderness and Eccentricity on the Mechanical Properties of Concrete-Filled GFRP Tube Columns

Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns

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

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