Experimental investigation and computational simulation of slender self-stressing concrete-filled steel tube columns

Liu, Zhenzhen; Lu, Yiyan; Li, Na; Zong, Shuai

doi:10.1016/j.jobe.2021.103893

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…Also, increasing the length-to-diameter ratio has a negative impact on effectiveness of self-stress in improving behavior of CFST structure. 79 Recently, steel slag aggregates concrete (SSAC) containing the oxides, MgO and free-CaO, are also being utilized in CFST structures. Because of SSAC's slight expansion, the mechanical characteristics of the composite part might be significantly enhanced by using it.…”

Section: Expansive/self-stressing Concrete As Infill Materialsmentioning

confidence: 99%

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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Section: Expansive/self-stressing Concrete As Infill Materialsmentioning

confidence: 99%

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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“…Although, the axial test results showed lesser values compared to normal CFST, higher ductility was achieved with more local buckling and hardening postpeak response [19]. Comparison of numerical analysis with experiments of CFST, reinforced cement concrete and slender selfstressing CFST columns with different concrete grade and steel percentage were done showing the satisfactory result in loaddisplacement plots and ultimate capacities [20,21]. Experimental investigation on early age loading of CFST done with wrapping of fibre reinforced polymer cloths are compared with normal CFST.…”

Section: Literaturementioning

confidence: 99%

Experimental and numerical study on the effect of parameters in axial capacity of CFST columns with various L/D ratios

2022

IJATEE

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Strength as well as behaviour of 16 circular concrete filled steel tube (CFST) sections submitted to axial compressive load was presented in this paper. Specimens having length to diameter (L/D) ratios of 3, 4, 5 and 6 with diameter to thickness (D/t) ratios of 38 as well as 25.33 with same outer diameter of 76 mm and two different wall thickness of 2 mm and 3 mm were considered to study the influence of column parameters and effect of confinement (Ꝣ). The ultimate capacities of CFST columns were compared with Eurocode-4, Australian Standards (AS 5100), American Code (AISC 360 -10) and Chinese code (DBJ13-51) predictions. Results showed that axial compressive loads of specimens with more wall thickness were found to be greater than lesser wall thickness specimens. The parameters that affect the column behaviour directly are relative slenderness ratio (λ) and L/D. Eurocode-4 results found to be conservative, Australian code and American Code underestimated while Chinese code overestimated the section capacity. Further, a finite element model of CFST specimens was developed with ABAQUS to check the accuracy of test results, buckling patterns and displacement curves.

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“…In circular CFST columns, the confinement effect plays a crucial role in enhancing the performance of concrete. When confined within the steel tube, concrete is subjected to triaxial stress, leading to higher compression performance than unconfined concrete [1,2]. This phenomenon occurs because the confinement restrains the lateral expansion of concrete, enabling it to withstand higher axial loads before failure.…”

Section: Introductionmentioning

confidence: 99%

“…High-strength concrete has the potential to exhibit brittle failure when subjected to high stress. Still, the steel tube in CFST columns restrains this behavior, leading to increased ductility and energy absorption capacity [1,5,6]. Overall, CFST columns offer numerous advantages over traditional concrete or steel columns, such as enhanced load-carrying capacity, improved ductility, greater resistance to buckling, and better fire resistance [2,7,8].…”

Section: Introductionmentioning

confidence: 99%

Structural Performance of Strengthening of High-Performance Geopolymer Concrete Columns Utilizing Different Confinement Materials: Experimental and Numerical Study

Abadel

2023

Buildings

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The objective of this study was to investigate the effectiveness of different confinement materials in strengthening geopolymer concrete (GP) columns subjected to axial compression loading. This research encompassed both experimental and numerical analyses. The experimental phase involved testing seven circular GP columns, while the numerical phase involved developing 3D finite element (FE) models using ABAQUS software. The primary focus of this study was to assess the impact of using outer and inner steel tubes, as well as an outer polyvinyl chloride (PVC) tube and a carbon-fiber-reinforced polymer (CFRP) sheet. To validate the FE models, the experimental results were utilized for comparison. The findings of this study revealed that the outer steel tube provided superior confinement effects on the GP column’s concrete core compared to the PVC tube and CFRP sheet. The axial capacities of the columns confined with steel, PVC, and CFRP materials were observed to increase by 254.7%, 43.2%, and 186%, respectively, in comparison to the control specimens. Furthermore, the utilization of all confinement materials significantly enhanced the absorbed energy and ductility of the columns. The FE models demonstrated a reasonably close match to the experimental results in terms of load–displacement curves and deformation patterns. This correspondence between the numerical predictions and experimental data confirmed the reliability of the FE models and their suitability for generating further predictions. In summary, this study contributes to the field by exploring the efficacy of various confinement materials in strengthening GP columns. The results highlight the superior performance of the outer steel tube and demonstrate the positive influence of PVC and CFRP materials on enhancing the structural behavior of the columns. The validation of the FE models further supports their reliability and their potential for future predictions in similar scenarios.

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Experimental investigation and computational simulation of slender self-stressing concrete-filled steel tube columns

Cited by 7 publications

References 28 publications

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

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

Experimental and numerical study on the effect of parameters in axial capacity of CFST columns with various L/D ratios

Structural Performance of Strengthening of High-Performance Geopolymer Concrete Columns Utilizing Different Confinement Materials: Experimental and Numerical Study

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