Micro-Steel Fiber-Reinforced Self-compacting Concrete-Filled Steel-Tube Columns Subjected to Axial Compression

Shah, Shaik Madeena Imam; Ganesh, G. Mohan

doi:10.1007/s13296-023-00747-x

Cited by 5 publications

(1 citation statement)

References 20 publications

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“…To further increase the ultimate strength of CFST columns, various approaches can be taken. For instance, self-compacting concrete made with fly ash and silica fume [22], fiber-reinforced concrete [23], and micro-steel fiber concrete [24] have been found effective. Micro-steel fiber concrete has the added benefit of improving ductility and delaying local buckling of the column [24].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Axially Loaded Concrete Columns Reinforced with Steel Tubes Infilled with Cementitious Grouting Material

Abbood,

Oukaili

2024

Civ Eng J

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The paper presents a novel method of reinforcing concrete columns using small-diameter steel tubes instead of traditional steel bars. The researchers conducted experimental investigations on twelve mid-scale circular concrete column specimens, which were divided into two groups consisting of six specimens each: short and long columns. Two of the specimens in each group were reinforced with steel bars, while the remaining four were reinforced with steel tubes filled with cementitious grouting material. The study proposed two concepts for cementitious grouted steel-tube reinforcement. The first concept utilized steel tubes with equivalent net areas to the steel bar areas used in the reference column, while the second concept used steel-tube reinforcement with the same diameter as the steel bars in the reference column. Nonlinear Finite Element (FE) analyses were conducted on experimental specimens using ABAQUS software. The results showed that using steel tubes with an area equivalent to that of steel bars instead of conventional columns increased the bearing capacity of reinforced concrete columns by 17%. Moreover, using steel tubes whose area matched 30% of the steel bar area achieved a bearing capacity of about 81% of the conventional concrete columns. The experimental and FE analysis findings indicate that this methodology can increase the bearing capacity of reinforced concrete columns when compared to traditional methods. The axial load-axial displacement curves, axial load-axial strain curves, and failure load of the FE model all demonstrated good convergence with the experimental data. Doi: 10.28991/CEJ-2024-010-02-017 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Behavior of Axially Loaded Concrete Columns Reinforced with Steel Tubes Infilled with Cementitious Grouting Material

Abbood,

Oukaili

2024

Civ Eng J

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Unified artificial neural network, linear and nonlinear statistics methods for forecasting the capacity of axially loaded concrete-filled steel tube (CFST) members

Mostafa,

Hegazy

2024

Structures

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A study on the mechanical and economic performance comparison of ceramsite concrete based on fiber selection and optimization

Wang,

Li,

Fan

et al. 2024

Sci Rep

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To improve the toughness and strength of ceramsite concrete, this study employed three different types of fibers to enhance its performance. It prepared 8 sets of specimens, conducted stress-strain curve and static strength tests, and calculated various performance parameters. Through analysis of the economic performance and failure modes, it is found that high-toughness polypropylene fibers and steel fibers significantly enhanced both the strength and toughness of ceramsite concrete, while carbon fibers, although capable of increasing strength, do not improve toughness. Specifically, high-toughness polypropylene (HTPP) fibers and steel fibers increased the strength of ceramsite concrete by 32.8% and 49.0%, respectively, resulting in corresponding improvements in strength-to-weight ratio by 33.0% and 39.8%. While the toughness index W cu 0.85 increased by 20.0% and 85.1%, respectively, W cu 0.5 increased by 29.0% and 257.6%. The failure mode exhibited ductile fracture. Additionally, HTPP fibers were more cost-effective in increasing the strength and toughness of ceramsite concrete. Finally, based on SEM test results, we explained the mechanisms through which the three types of fibers enhance the performance of ceramsite concrete from the perspective of fibers surface characteristics. These research findings provide theoretical support for the optimization design of ceramsite concrete and are of significant importance for its application as a structural material.

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Micro-Steel Fiber-Reinforced Self-compacting Concrete-Filled Steel-Tube Columns Subjected to Axial Compression

Cited by 5 publications

References 20 publications

Behavior of Axially Loaded Concrete Columns Reinforced with Steel Tubes Infilled with Cementitious Grouting Material

Behavior of Axially Loaded Concrete Columns Reinforced with Steel Tubes Infilled with Cementitious Grouting Material

Unified artificial neural network, linear and nonlinear statistics methods for forecasting the capacity of axially loaded concrete-filled steel tube (CFST) members

A study on the mechanical and economic performance comparison of ceramsite concrete based on fiber selection and optimization

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