Behavior of CFSTs and CCFSTs under quasi-static axial compression

Abdalla, Suliman; Abed, Farid; AlHamaydeh, Mohammad

doi:10.1016/j.jcsr.2013.08.007

Cited by 68 publications

(19 citation statements)

References 21 publications

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“…Despite the significant amount of existing research on the axial compressive behavior of CCFT columns, the experimental research on its seismic behavior has been very limited. The limited existing studies [7][8][9]14], have generally confirmed the excellent seismic resistance of circular [8,9] and square CCFTs [7,14]. In this paper, a series of large-scale cantilever column tests are presented, where CFT columns with or without FRP jacketing at the column end were tested under combined constant axial compression and monotonic or cyclic lateral loading.…”

Section: Introductionmentioning

confidence: 88%

“…[7][8][9]) as well as other researchers (e.g. [10][11][12][13][14][15][16]) on the effectiveness of FRP confinement in improving the structural behaviour of CFT columns. The authors' group has conducted a systematic study into the axial compressive behavior of FRP-confiend circular CFT columns; this study included several series of tests on cicular glass FRP (GFRP)-confined CFT columns under monotonic axial compression [6] and cyclic axial compression [17], and the development of monotonic and cyclic stress-strain models for the confined concrete in circular CCFT columns [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Teng

2016

Journal of Constructional Steel Research

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Concrete-filled steel tubular (CFT) columns are widely used as columns in many structural systems and a common failure mode of such tubular columns is inelastic outward local buckling near a column end. The use of fibre-reinforced polymer (FRP) jackets/wraps for the suppression of such local buckling has recently been proposed and has been proven to possess excellent potential in both retrofit/strengthening and new construction. This paper presents the results of an experimental study into the behaviour of large-scale FRPconfined CFT (CCFT) columns under combined axial compression and lateral loading. The test parameters included the stiffness of the FRP jacket and the loading scenario. The test results showed that the FRP jacket can effectively delay or even prevent outward local buckling at the end of a cantilevered CFT column, leading to significantly improved structural performance under combined constant axial compression and cyclic lateral loading. Compared to monotonic lateral loading, cyclic lateral loading was found to introduce more severe localized deformation near the column end and may lead to earlier FRP rupture within that region.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Teng

2016

Journal of Constructional Steel Research

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“…Circular glass FRP confined CFT columns were tested under monotonic axial compression (Mao and Xiao, 2006) and cyclic axial compression (Yu et al, 2014;Teng et al, 2013). However, limited research studies were carried out on the seismic behavior of FRP confined CFT steel columns (Xiao et al, 2005;Qin et al, 2013;Gu et al, 2004;Abdalla et al, 2013), and confirmed that both circular and square FRP confined CFT steel columns demonstrate excellent seismic resistance.…”

Section: Introductionmentioning

confidence: 94%

“…The end confinement also improves the inner concrete performance, especially at the highly stressed end regions (Xiao, 2004;Teng et al, 2012;Mao and Xiao, 2006). The effectiveness of FRP confinement of CFT steel columns was evaluated afterward in many studies (Xiao et al, 2005;Qin et al, 2013;Gu et al, 2004;Tao et al, 2007;Wang et al, 2008;Liu and Lu, 2010;Park et al, 2010;Abdalla et al, 2013;Wang et al, 2015;Hu et al, 2011). Circular glass FRP confined CFT columns were tested under monotonic axial compression (Mao and Xiao, 2006) and cyclic axial compression (Yu et al, 2014;Teng et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Finite-element modelling of concrete-filled steel tube columns wrapped with CFRP

Abdalla

Al-Rousan

Alhassan

et al. 2020

Proceedings of the Institution of Civil Engineers - Structures

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Experimental evaluation of the structural behavior of concrete-filled tubular (CFT) circular steel columns under the combined effects of axial and cyclic lateral loads is costly and challenging. Therefore, this study provides a nonlinear finite element analysis (FEA) of 21 models for CFT circular steel columns wrapped with a number of carbon fiber reinforced polymer (CFRP) composites layers at its end region, which represents the critical location in terms of the lateral load capacity. The intent is to confine the column end to avoid outward local buckling of the CFT column and thus developing high strength, larger net drift and more energy dissipation. The nonlinear FEA models were properly calibrated and validated with reputable experimental results, followed by conducting a parametric study to assess the influence of the number of CFRP layers and axial load level on the CFT circular steel column performance. Also, it was found that the column axial load level significantly affects the CFT circular steel column behavior under lateral loading; better behavior as the axial load level increased. It takes a parametric investigation and a significant extension of the strengthening system of any CFT circular steel column and the findings of this study represents useful guidelines and methodology for similar strengthening of CFT steel columns.

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“…Extensive studies have been conducted on the static and dynamic analyses, and the fire performance of CFST members [1][2][3][4][5][6][7][8][9][10]. For example, Han et al [1], Yu et al [2], Dundu et al [3], Dai et al [4] studied the compressive strength of CFST members.…”

Section: Introductionmentioning

confidence: 99%

Study on Axial Compression Bearing Capacity of Reinforced Concrete Filled Steel Tube Members

Zha¹,

Li²,

Wang³

et al. 2016

Volume 12 Number 2

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ABSTRACT:The bearing capacity equation of reinforced concrete filled steel tube (RCFST) members under axial loads is derived by using the combined unified and limit equilibrium theories. The concrete strength increase due to the constraint effect of the steel tube is taken into account through the use of unified theory; whereas the concrete strength increase due to the constraint effect of the stirrups is considered through the use of the limit equilibrium theory. Three-dimensional nonlinear finite element analysis and experimental tests were carried out and the corresponding results are reported in this paper. The comparisons of the numerical, experimental and theoretical results show that there are in good agreement between these three different methods. However, the present theoretical analysis model is not only simple and convenient to use but also consistent with existing Chinese design codes for CFST columns.

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Behavior of CFSTs and CCFSTs under quasi-static axial compression

Cited by 68 publications

References 21 publications

Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Finite-element modelling of concrete-filled steel tube columns wrapped with CFRP

Study on Axial Compression Bearing Capacity of Reinforced Concrete Filled Steel Tube Members

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