Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

Lu, Yiyan; Li, Na; Li, Shan

doi:10.3390/polym6051333

Cited by 101 publications

(31 citation statements)

References 23 publications

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“…Sundarraja and Prabhu [2] studied experimentally the behavior of steel tubes filled with concrete and partially wrapped with Carbon Fiber Reinforced Polymers (CFRP) under axial compressive loads. They showed that CFRP provided effective confinement, delayed local buckling occurrence, and increased ultimate bearing capacity in agreement with the results of Lu et al [3] and the experimental and numerical results of Shen et al [4]. They concluded that unwrapped areas exhibited strains increase that led to local buckling occurrence at these areas.…”

Section: Introductionsupporting

confidence: 77%

Analysis of strengthened short deficient rubberized concrete-filled steel tubular columns

Elshazly

Mustafa

Fawzy

2020

Frattura Ed Integrità Strutturale

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Concrete-filled steel tubular (CFST) columns are broadly used in many structural systems for their well-known merits. This paper presents a finite element investigation on the structural behaviour of short circular deficient steel tubes filled with rubberized concrete (RuC), under axial compressive load. To accomplish this study, a validation of the proposed three-dimensional nonlinear finite element model; using ANSYS software; was carried out showing good accurateness. The analysis involved two different concrete mixes with 5% and 15% replacement of fine aggregate volume with crumb rubber particles. Columns strength reduction due to horizontal or vertical deficiencies was handled by increasing the thickness of the steel tube or wrapping the columns with two different types of FRP sheets. Five strengthening arrangements were studied using GFRP sheets and CFRP sheets. The results indicated that the ultimate bearing capacity of the RuCFST columns was increased with increasing the steel tube thickness. application of FRP sheets for strengthening the deficient RuCFST columns efficiently managed to retrieve the strength-lost due to either horizontal or vertical deficiency. Moreover, an enhancement in the columns’ ductility was observed especially when using GFRP sheets

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Section: Introductionsupporting

confidence: 77%

Analysis of strengthened short deficient rubberized concrete-filled steel tubular columns

Elshazly

Mustafa

Fawzy

2020

Frattura Ed Integrità Strutturale

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“…Concrete Filled Tube (CFT) structures are widely used in engineering due to their excellent structural and constructional performance [1,2]; this is especially the case for typical forms of Concrete Filled Steel Tube (CFST) structures [3][4][5][6][7][8][9][10]. Attention also has been paid to Concrete Filled Fiber Reinforced Polymer (FRP) Tubes, in view of their anti-corrosion properties, which can be better adapted to corrosive environments than CFST [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Andjelic

et al. 2018

Applied Sciences

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Abstract:The purpose of this research is to study the effect of both transverse impact, and ratio of outer diameter to thickness of outer steel tube (D/t), on the residual axial bearing capacity of concrete-filled circular steel tubular columns (CFCSTCs). A total of sixteen samples, including four samples left untreated for comparison, are experimentally studied to investigate the effect of both drop-hammer transverse impact height (H), and D/t ratio, on the residual axial bearing capacity of CFCSTCs. The failure mode, load-displacement curves, load-strain curves, and residual axial bearing capacity of those samples are extensively investigated. A finite element analysis (FEA) model is established to predict the effect of D/t ratio on the residual axial bearing capacity of CFCSTCs. The results indicate that the H and the D/t ratio have noticeable effects on the axial compression performance of CFCSTCs. Failure mode of samples is commonly local buckling. In addition, maximum reduction of the axial bearing capacity of columns reaches about 35% compared with that of untreated columns. The results also show that the bearing capacity of the column increases with a decreasing D/t ratio of the same diameter (D).

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“…A number of experimental studies [15,16] on SSCFST have been conducted to understand its mechanical performance, and design theory [17] was proposed accordingly. Some models have been developed to predict the load capacity of the FCFST columns [18,19]; however, the effect of the expansion of the concrete was not considered.…”

Section: Introductionmentioning

confidence: 99%

Study on Axial Compressive Capacity of FRP-Confined Concrete-Filled Steel Tubes and Its Comparisons with Other Composite Structural Systems

Deng

Zheng

Wang

et al. 2017

International Journal of Polymer Science

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Concrete-filled steel tubular (CFST) columns have been widely used for constructions in recent decades because of their high axial strength. In CFSTs, however, steel tubes are susceptible to degradation due to corrosion, which results in the decrease of axial strength of CFSTs. To further improve the axial strength of CFST columns, carbon fiber reinforced polymer (CFRP) sheets and basalt fiber reinforced polymer (BFRP) sheets are applied to warp the CFSTs. This paper presents an experimental study on the axial compressive capacity of CFRP-confined CFSTs and BFRP-confined CFSTs, which verified the analytical model with considering the effect of concrete self-stressing. CFSTs wrapped with FRP exhibited a higher ductile behavior. Wrapping with CFRP and BFRP improves the axial compressive capacity of CFSTs by 61.4% and 17.7%, respectively. Compared with the previous composite structural systems of concrete-filled FRP tubes (CFFTs) and double-skin tubular columns (DSTCs), FRP-confined CFSTs were convenient in reinforcing existing structures because of softness of the FRP sheets. Moreover, axial compressive capacity of CFSTs wrapped with CFRP sheets was higher than CFFTs and DSTCs, while the compressive strength of DSTCs was higher than the retrofitted CFSTs.

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Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

Cited by 101 publications

References 23 publications

Analysis of strengthened short deficient rubberized concrete-filled steel tubular columns

Analysis of strengthened short deficient rubberized concrete-filled steel tubular columns

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

Study on Axial Compressive Capacity of FRP-Confined Concrete-Filled Steel Tubes and Its Comparisons with Other Composite Structural Systems

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