Concrete filled double skin circular stub columns under compression

Uenaka, Kojiro; Kitoh, Hiroaki; Sonoda, Keiichiro

doi:10.1016/j.tws.2009.08.001

Cited by 209 publications

(124 citation statements)

References 7 publications

(10 reference statements)

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“…The authors stated that the increment in the compressive strength of the concrete had to be considered to accurately predict the ultimate failure load. In the same line, Uenaka et al [7] performed a series of tests on CHS-CHS sections where the steel tubes had the same thickness. This work focused on the study of the confinement and in this case the concrete had a compressive strength of 19 MPa.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

et al. 2017

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This paper presents the results of an experimental program where the load-bearing capacity at room temperature of 14 slender circular concrete-filled dual steel tubular (CFDST) columns under axial load was analysed. In this study, two specimens were prepared as ordinary concrete-filled steel tubular (CFST) columns to be used as references to evaluate the mechanical contribution of the inner steel tube and its infill in the CFDST columns. In addition, the effect of two types of concrete: normal strength concrete (NSC) and ultra-high strength concrete (UHSC) was assessed. Besides, in order to study the influence of the steel share between the inner and outer tube, different cross-sectional configurations were considered. Since the number of experimental results available in the literature on slender CFDST columns is scarce, this work provides novel results to this research field. The different influence of the steel distribution in the response of the specimens of each series was observed, with no influence in the case of columns with ultra-high strength concrete in the outer ring. Finally, the current provisions of Eurocode 4 for the design of composite columns were assessed by means of the results of these tests, being necessary more test data to extract solid conclusions about their accuracy and reliability.

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Section: Introductionmentioning

confidence: 99%

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

et al. 2017

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“…Ta o et al (2004) reported that in the experiments a greater gain inductility of the CFDST column and a less local buckling of the inner tube were obtained for sections with smaller Do/to and Di/ti, correspondingly [05]. Uenaka et al (2010) experimentally examined the influence of χ on the confinement effect of CFDST columns under concentric axial compression. The tests showed that the confinement effect developed in the CFDST columns improved the concrete strength by 5% to 30%, which was inversely proportional to χ (hollow cross section ratio) [06].…”

Section: Introductionmentioning

confidence: 99%

Effective parameters on the behavior of CFDST columns

Farajpourbonab¹

2017

Istrazivanja I Projektovanja Za Privredu

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“…With the purpose of characterizing CFDST columns, several experimental campaigns have been performed, most of them focused on stub columns with double-skin cross-section as published in [2]- [7]. In most of these works, the thick tube was placed outside and the thin tube at the inner part (thick-thin) [2] [5], although specimens with tubes with the same thickness were also tested.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high Strength Concrete on Eccentrically Loaded Slender Circular Concrete-filled Dual Steel Columns

et al. 2017

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This paper presents an experimental study which was undertaken to investigate the effect of ultra-high strength concrete (UHSC) on the mechanical response of concrete-filled dual steel tubular columns (CFDST) subjected to eccentric loads. This campaign is a continuation of a previous program on axially loaded members and consists in testing 12 CFDST specimens and two concrete-filled tubular (CFST) columns which serve as references. The location of the dual-grade concretes (outer ring and inner core) and the steel thicknesses configuration were the parameters analysed. Therefore, in this program, two series can be distinguished: 6 columns with normal strength concrete in their outer rings and, conversely, 6 with ultra-high strength concrete. In addition, two different steel tube thicknesses configurations were considered: columns with thin outer steel tube and thick steel tube (thin-thick); and the opposite pattern (thick-thin). Moreover, the experiments on the CFST columns of reference served to investigate the effect of the extra inner steel tube and its filling in CFDST columns. Since the number of campaigns on eccentrically loaded slender CFDST columns is scarce, the results presented in this work become particularly relevant.The analysis of the results revealed that, for both series, the response of the specimens showed similar trend but the effect of UHSC differed from that observed for axially loaded Ibañez C, Romero ML, Espinos A, Portolés JM, Albero V. Ultra-high strength concrete on eccentrically loaded slender circular concrete-filled dual steel columns. 2017. Structures; 12: 64-74. doi: 10.1016/j.istruc.2017 2 columns. Finally, the experimental data were contrasted to the predictions given by Eurocode 4 for the design of composite columns resulting, in general, in slightly unsafe predictions.

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Concrete filled double skin circular stub columns under compression

Cited by 209 publications

References 7 publications

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

Effective parameters on the behavior of CFDST columns

Ultra-high Strength Concrete on Eccentrically Loaded Slender Circular Concrete-filled Dual Steel Columns

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