Behavior of concrete-filled double skin steel tubular columns with octagon section under axial compression

Yang, Junjie; Xu, Hanyong; Peng, Guojun

doi:10.1007/s11709-008-0035-5

Cited by 17 publications

(11 citation statements)

References 5 publications

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“…Tests on square-circular columns were reported by Han et al [39]. Yang et al [41] performed experimental tests on a different combination of outer and inner steel tube shapes. They concluded that circular columns performed better, followed by outer-square inner-circular sections.…”

Section: Introductionmentioning

confidence: 99%

Axial Behavior of Concrete-Filled Double-Skin Tubular Stub Columns Incorporating PVC Pipes

et al. 2021

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This experimental study presents concrete-filled double-skin tubular columns and demonstrates their expected advantages. These columns consist of an outer steel tube, an inner steel tube, and concrete sandwiched between two tubes. The influence of the outer-to-inner tube dimension ratio, outer tube to thickness ratio, and type of inner tube material (steel, PVC pipe) on the ultimate axial capacity of concrete-filled double-skin tubular columns is studied. It is found that the yield strength of the inner tube does not significantly affect the ultimate axial capacity of concrete-filled double-skin tubular composites. With the replacement of the inner tube of steel with a PVC pipe, on average, less than 10% strength is reduced, irrespective of size and dimensions of the steel tube. Hence, the cost of a project can be reduced by replacing inner steel tubes with a PVC pipes. Finally, the experimental results are compared with the existing design methods presented in AISC 360-16 (2016), GB51367 (2019), and EC4 (2004). It is found from the comparison that GB51367 (2019) gives better results, followed by AISC (2016) and EC4 (2004).

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Section: Introductionmentioning

confidence: 99%

Axial Behavior of Concrete-Filled Double-Skin Tubular Stub Columns Incorporating PVC Pipes

et al. 2021

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“…In this case, the columns were subjected to axial loads and a considerable increment of the ultimate load with concrete strength was detected. In the same way, Yang et al [9] developed an experimental campaign on specimens with outer octagonal steel tubes and inner circular steel tubes but using NSC and established that the bearing capacity of these columns is greater than those with squarecircular sections but smaller than those with circular-circular geometries. As a novelty in CFDST columns, Li et al [10], [11] performed tests on tapered columns of circularcircular section under eccentric loads.…”

Section: Introductionmentioning

confidence: 99%

08.37: Experimental analysis of concrete‐filled double skin tubular columns subjected to eccentric loads

et al. 2017

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The results obtained from an experimental campaign on concrete-filled double-skin steel columns subjected to eccentric loads are presented in this paper. The program includes columns with equivalent cross-sectional area but with different shape combinations of the inner and outer steel tubes: circular-circular, circular-rectangular and square-circular tubes. The experiments have been designed considering columns with steel tubes of different dimensions and concrete infill with different strength: normal (NSC) and high strength concrete (HSC). Besides, all the tubes employed for the configuration of the columns are thin-walled steel tubes. The effects of materials and geometry are studied in order to find the best configuration attending to ultimate capacity, strength index and concrete contribution ratio. Results show that as expected, the use of HSC results in an increment in the load bearing capacity and in the concrete contribution ratio of the columns, which decreases with eccentricity. Regarding the shape effect, the configuration with circular-circular tubes proved to be the most efficient, contrarily to the rectangular-circular double skin section.

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“…It improves the strength-to-weight ratio by replacing the bulky central concrete with a lighter inner steel tube. It also provides a dry atmosphere within the inner steel tube, which is particularly useful to house sub-sea oil production facilities for offshore structures [32,35,36].…”

Section: Introductionmentioning

confidence: 99%

Simplified Design Model for Uni-Axially Loaded Double-Skinned Concrete-Filled-Steel-Tubular Columns With External Confinement

Dong²

2014

Volume 10 Number 2

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One of the significant contributions of using double-skinned concrete-filled-steel-tubular (CFST) columns is that it can extend the maximum limit of concrete strength that can be practically used in the construction industry, by improving the ductility of columns through providing more uniform and continuous confining pressure to the in-filled concrete. However, because of the imperfect interface bonding occurs at early stage, the elastic strength and stiffness will decrease so that the confinement effect provided by the steel tube is not fully utilized. To improve the situation, the authors have proposed to use external confinement in the form of steel rings on the outer steel tube to restrict the dilation of CFST columns and thus restore an intact interface bonding condition. It has been verified by uni-axial compression test that the elastic strength, stiffness and interface bonding were improved. Based on the test results, the authors have developed a theoretical model for predicting the uni-axial load-carrying capacity of doubled-skinned CFST columns. As a continued study, the authors will investigate the most critical parameters affecting the uni-axial strength, and to develop a simplified formula for practical design of doubled-skinned CFST columns through an extensive parametric study.

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Behavior of concrete-filled double skin steel tubular columns with octagon section under axial compression

Cited by 17 publications

References 5 publications

Axial Behavior of Concrete-Filled Double-Skin Tubular Stub Columns Incorporating PVC Pipes

Axial Behavior of Concrete-Filled Double-Skin Tubular Stub Columns Incorporating PVC Pipes

08.37: Experimental analysis of concrete‐filled double skin tubular columns subjected to eccentric loads

Simplified Design Model for Uni-Axially Loaded Double-Skinned Concrete-Filled-Steel-Tubular Columns With External Confinement

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