Experimental and numerical investigation of concrete-filled hot-finished and cold-formed steel elliptical tubular stub columns

Cai, Yancheng; Quach, Wai-Meng; Young, Ben

doi:10.1016/j.tws.2019.106437

Cited by 33 publications

(11 citation statements)

References 29 publications

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“…Generally, it is shown that the normalized column strength increased linearly with the increment of the infilled concrete strength for the CFHSS square and rectangular stub column specimens with a given value of h/t (Figures 10(a)-(c)), where the infilled concrete strength of "0" in the horizontal axis means the CFHSS square and rectangular hollow section columns without any infilled concrete. Similar findings have been presented by Su et al [27] for concrete-filled CFHSS circular tubular stub columns and by Cai et al [28] for concrete-filled cold-formed and hot-finished steel elliptical tubular stub columns.…”

Section: Influence Of Parameterssupporting

confidence: 89%

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High strength steel square and rectangular tubular stub columns infilled with concrete

Cai

Chen

et al. 2021

Journal of Constructional Steel Research

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Section: Influence Of Parameterssupporting

confidence: 89%

“…The parametric study of the concrete-filled CFHSS square and rectangular stub columns aims to study its structural behaviour under axial compression. These included the ultimate load, end shortening, the strength enhancement index (SI), as well as the ductility index (DI) [28].…”

Section: Definition Of Parametersmentioning

confidence: 99%

High strength steel square and rectangular tubular stub columns infilled with concrete

Cai

Chen

et al. 2021

Journal of Constructional Steel Research

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“…To prevent "elephant foot" failure, endstiffeners in the form of steel rings with 30 mm width were screwed onto the specimen near its ends. As the top surfaces of the infilled concrete and the steel tube might not be at same level, a plaster material was used to fill the small gap between the top surfaces of the infilled concrete and the steel tube [42].…”

Section: Testing Of Unfilled Steel Tubes and Cfst Specimensmentioning

confidence: 99%

Circular concrete filled steel tubes made of eco-concrete with limestone fines added as cementitious paste replacement

Cai

Kwan

2020

Structures

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“…The usage of steel tubes not only results in higher load-bearing capacity of columns, but the introduction of CFRP as a wrapping element on steel tubes leads to further increase in the load-bearing capacity of composite columns. Several experimental and numerical modeling studies (Liu et al, 2017;Cai et al, 2019) have been conducted on the behavior of elliptical concrete-filled steel tubes and reported that the influence of elliptical shape on load carrying capacity of column. Elchalakani et al (2020) tested 15 solid, circular, GFRP-reinforced concrete columns and reported an increase in ductility for both axial and eccentric loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Finite element, analytical, artificial neural network models for carbon fibre reinforced polymer confined concrete filled steel columns with elliptical cross sections

et al. 2023

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In the present era of architecture, different cross-sectional shapes of structural concrete elements have been utilized. However, this change in shape has a significant effect on load-carrying capacity. To restore this, the use of column confinements with elliptical sections has gained attention. This paper aim to investigate the effect of elliptical shape sections of confined concrete reinforced with Carbon Fiber Reinforced Polymer (CFRP) and steel tube on axial load-carrying capacity. This study is achieved using following tools Finite Element (FE) in Abaqus and Artificial Neural Networks (ANN) modeling. The study involved a 500-mm-high column with three sets of aspect ratios: 1.0, 1.5, and 2.0. In each aspect ratio, three different layers of CFRP were used, i.e., .167, .334, and .501-mm. Analytical results showed that with the increase in aspect ratio from 1 to 2, there is a decrease in ultimate axial load of about 23.2% on average. In addition, the combined confining pressure of steel tube and CFRP increases with a decrease in dilation angle as the number of CFRP layers increases. The failure mode for the column with a large aspect ratio is local buckling at its mid-height along the minor axis. The result showed a good correlation between FE and experimental results of ultimate stress and strains, with a mean squared error of 2.27 and .001, respectively. Moreover, ANN and analytical models showed a delightful correlation of R2 of .97 for stress models and .88 for strain models, respectively. The elliptical concrete section of the column confined with steel tubes can be adopted for a new architectural type of construction; however, with more than three aspect ratios, the wrapping of the section with CFRP jackets is highly recommended.

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Experimental and numerical investigation of concrete-filled hot-finished and cold-formed steel elliptical tubular stub columns

Cited by 33 publications

References 29 publications

High strength steel square and rectangular tubular stub columns infilled with concrete

High strength steel square and rectangular tubular stub columns infilled with concrete

Circular concrete filled steel tubes made of eco-concrete with limestone fines added as cementitious paste replacement

Finite element, analytical, artificial neural network models for carbon fibre reinforced polymer confined concrete filled steel columns with elliptical cross sections

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