Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete

Ahmed, Mizan; Liang, Qing Quan; Patel, Vipulkumar Ishvarbhai; Hadi, Muhammad N.S.

doi:10.1016/j.engstruct.2019.109790

Cited by 53 publications

(24 citation statements)

References 26 publications

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“…However, owing to the limited study performed on such columns, design specifications have not yet been developed to guide the design engineers. Some experimental program on short CFDST columns composed of the circular section has been reported in the literature including Ekmekyapar and Al-Eliwi (2017), Peng et al (2011), Liew and Xiong (2012), Wan and Zha (2016), Xiong et al (2017), Fang and Lin (2014), Liang et al (2020) and Ahmed et al (2019a). The test parameters studied by the researchers include the influences of concrete 1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, PR China.…”

Section: Introductionmentioning

confidence: 99%

Axial compressive behavior of circular concrete-filled double steel tubular short columns

Ahmed

Tran

et al. 2021

Advances in Structural Engineering

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This article investigates the axial compressive performance of concrete-filled double steel tubular (CFDST) short columns composed of circular section loaded concentrically. An experimental program comprised of compression tests on short columns is carried out to examine their structural performance. Axial compression tests on conventional concrete-filled steel tubular (CFST) columns and double-skin concrete-filled steel tubular (DCFST) columns are also performed for comparison purposes. The test parameters include the diameter-to-thickness of the outer and inner steel tubes, concrete strength, and diameter ratio. The test results exhibit that CFDST short columns composed of the circular section have improved structural performance compared to its CFST and DCFST counterparts. A theoretical model is also presented to simulate the test ultimate strengths and load-axial strain relationships of CFDST columns. The existing design models proposed including the codified design specifications are evaluated against the collected test data for predicting the axial compressive strengths of circular CFDST columns. It is seen that the existing codified design models cannot yield their ultimate axial compressive strengths accurately. A practical artificial neural network (ANN) model is proposed to estimate the ultimate load of such columns loaded concentrically.

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Section: Introductionmentioning

confidence: 99%

Axial compressive behavior of circular concrete-filled double steel tubular short columns

Ahmed

Tran

et al. 2021

Advances in Structural Engineering

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“…Wan and Zha (2016), Ekmekyapar and Al-Eliwi (2017), Romero et al (2015), Ahmed et al (2019a), and Chang et al (2013) studied the performance of circular CFDST columns whereas Peng et al (2011), Wang et al (2017), Qian et al (2011Qian et al ( , 2014, Ahmed et al (2019b) investigated the behavior of square CFDST columns with an inner circular hollow section. Numerical models were also developed by researchers such as Wan and Zha (2016), Ahmed et al (2018Ahmed et al ( , 2019aAhmed et al ( , 2019bAhmed et al ( , 2019cAhmed et al ( , 2020, Wang et al (2017), Qian et al (2011Qian et al ( , 2014, Ci et al (2020aCi et al ( , 2020b, and Hassanein et al (2013Hassanein et al ( , 2017 for such columns. Furthermore, Ci et al (2021) carried out a series of tests on circular CFDST short columns with an inner square tube.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of square concrete-filled double steel tubular stub columns

Ahmed

Jia

et al. 2021

Advances in Structural Engineering

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In this paper, the structural behavior of concrete-filled double steel tubular (CFDST) stub columns composed of square hollow sections is investigated experimentally and numerically. The experimental program comprises compression tests on short columns loaded concentrically. The test parameters mainly focused on the influences of the width-to-thickness ratios of steel tubes and concrete strength on the axial behavior of CFDST stub columns. Finite element (FE) models are also developed to investigate the influences of a wide range of structural parameters on their axial performance. It is observed that square CFDST columns have improved strength and ductility compared to their CFST and DCFST counterparts. Finally, a calculation formula is proposed to predict their ultimate compressive strengths under the axial compression load.

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“…Previously researchers studied the performance of CFDST short columns with various cross-sections [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The circular hollow tube (CHS) used for both outer and inner tubes in CFDST columns provides the most effective confinement to the core concrete compared to the other possible cross-sections.…”

Section: Introductionmentioning

confidence: 99%

“…Investigations of their performance subjected to eccentric loading have been very limited. Ahmed et al [12] carried out tests on circular CFDST short columns under axial and eccentric loads to study the influences of various column parameters. Romero et al [16] and Ibañez et al [17] tested CFDST slender columns subjected to eccentric loading where columns were made of ultra-high-strength concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Romero et al [16] and Ibañez et al [17] tested CFDST slender columns subjected to eccentric loading where columns were made of ultra-high-strength concrete. Numerical models were also developed by researchers such as Chang et al [1], Wan and Zha [3], Liew et al [7], Ahmed et al [8][9][10][11][12], Ci et al [13][14][15] to investigate the nonlinear inelastic behavior of CFDST columns under different loading conditions. Furthermore, the composite action have been previously studied through hamoda et al [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigations of Eccentrically Loaded Circular ConcreteFilled Double Steel Tubular Short Columns

Ci¹,

Ahmed²,

Chen³

et al. 2021

International Conference on Civil, Structural and Transportation Engineering

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Circular concrete-filled double steel tubular (CFDST) column offers improved strength and ductility compared to conventional concrete-filled steel tubular (CFST) column. This paper reports an experimental program carried out on short CFDST columns loaded either concentrically or eccentrically. The test parameters examine the influences of the eccentricity ratio and the diameter-to-thickness ratio of the steel tubes. The eccentricity ratio varied from 0 to 1.64 while the diameter-to-thickness ratio of the outer and inner steel tubes ranged between 43.8 to 54.75 and 32.57 to 45.6, respectively. It is observed that the tested columns failed in a ductile manner, however, an increase of the eccentricity ratio reduces the ultimate loads of the columns remarkably.

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Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete

Cited by 53 publications

References 26 publications

Axial compressive behavior of circular concrete-filled double steel tubular short columns

Axial compressive behavior of circular concrete-filled double steel tubular short columns

Experimental and numerical investigations of square concrete-filled double steel tubular stub columns

Experimental Investigations of Eccentrically Loaded Circular ConcreteFilled Double Steel Tubular Short Columns

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