Performance of Lightweight Concrete with Expansive and Air-Entraining Admixtures in CFST Columns

Natalli, Juliana Fadini; Andrade, Humberto Dias; Carvalho, José Maria Franco de; Silva, Keoma Defáveri do Carmo e; Mendes, Júlia Castro; Sarmanho, Arlene Maria Cunha; Peixoto, Ricardo André Fiorotti

doi:10.1061/(asce)mt.1943-5533.0003143

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…At the first load step, the modulus of elasticity of the concrete and steel are assumed to be constant, and the increment in the column deflection ∆v is determined in each section using Equation (11). Then, the element curvature increment ∆χ = − d 2 ∆v dz 2 is calculated based on the value of ∆v, as well as the value ∆ε 0 z from the first equation in (9). Based on the values of ∆χ and ∆ε 0 z , it is possible to determine the stress state change in the each cross-section plane from the solution of the FEM equations obtained in [26]:…”

Section: Methodsmentioning

confidence: 99%

“…Expanding the scope of CFST columns requires the development of methods for calculating their bearing capacity. Currently, a large amount of experimental research is being carried out on new types of pipe-concrete structures, including columns made of high-strength [8] and lightweight concrete [9]. Various types of cross-sections have been explored, including square and rectangular [10][11][12][13], hexagonal [14][15][16], octagonal [17], annular [18,19], elliptical, and oval [20,21] columns.…”

Section: Introductionmentioning

confidence: 99%

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Simplified Method for Calculating the Bearing Capacity of Slender Concrete-Filled Steel Tubular Columns

Chepurnenko,

Turina,

Akopyan

2023

CivilEng

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Concrete-filled steel tubular (CFST) columns are one of the most effective reinforced concrete structures, and improving their calculation is a critical task. The purpose of this study was to develop a simplified method for calculating slender CFST columns, taking into account the effect of lateral compression. The idea of the method is to use the equation of a reinforced concrete column’s longitudinal bending, without taking into account the effect of lateral compression. To take into account the lateral effects, the cross-sectional stiffnesses are corrected based on the analysis of the stress–strain state in the cross-sectional plane using the finite element method. The developed method was implemented by the authors in the MATLAB environment. The approbation of the proposed method was carried out on experimental data for centrally compressed columns of a circular cross-section, as well as eccentrically compressed columns of a circular and square cross-section, presented in two papers. For the centrally compressed columns, we conducted a study on the influence of initial imperfections in the form of eccentricities and initial curvatures on the value of the ultimate load. For the eccentrically compressed columns of the circular and square cross-section, the area of their effective operation was determined.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simplified Method for Calculating the Bearing Capacity of Slender Concrete-Filled Steel Tubular Columns

Chepurnenko,

Turina,

Akopyan

2023

CivilEng

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A review on the performance of concrete filled tubular columns under axial compression: Emphasis on geometrical parameters and various concrete infills and encasings

Rohilla,

Gupta

2023

Structural Design Tall Build

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SummaryThis paper summarizes the literature available on the behavior of concrete‐filled steel tubular (CFST) columns to evaluate the effect of geometrical properties such as shape of cross‐section, diameter‐to‐thickness ratio, and length‐to‐diameter ratio of CFST columns under axial loading. Then, the impact of different material composition for core concrete and encasing material is concluded for columns under axial loading. The performance of CFST is evaluated in terms of failure modes, ductility, stiffness, and axial compressive strength. For encasing tube, carbon steel, stainless steel, and aluminum are studied while for core, various concretes such as Normal (NSC) and high strength concrete (HSC), light weight concrete (LWC), recycled aggregate concrete (RAC), expansive concrete (EC), rubber crumb concrete(RuCC), and steel slag concrete (SSC) are covered for review in this paper. Material limitations as provided by various codes for design of composite structures is also mentioned for both tube and core concrete. Failure modes of concrete‐filled tubular(CFT) columns are most affected by geometric properties columns while materials used for concrete and encasing tube do not cause much difference. Though, ductility, axial compressive strength, and stiffness are affected by both geometric and material properties.

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Effect of Fire Loading: Rapid Cooling on the Axial Response of Lightweight Geopolymer Concrete-Infilled Encased Circular Steel Columns

Bhuvaneshwari,

Divya,

Guruprasath

et al. 2023

Arab J Sci Eng

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Performance of Lightweight Concrete with Expansive and Air-Entraining Admixtures in CFST Columns

Cited by 11 publications

References 35 publications

Simplified Method for Calculating the Bearing Capacity of Slender Concrete-Filled Steel Tubular Columns

Simplified Method for Calculating the Bearing Capacity of Slender Concrete-Filled Steel Tubular Columns

A review on the performance of concrete filled tubular columns under axial compression: Emphasis on geometrical parameters and various concrete infills and encasings

Effect of Fire Loading: Rapid Cooling on the Axial Response of Lightweight Geopolymer Concrete-Infilled Encased Circular Steel Columns

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