Nonlinear analysis of short concrete-filled double skin tube columns subjected to axial compressive forces

Hu, Hsuan Teh; Su, Feng

doi:10.1016/j.marstruc.2011.05.001

Cited by 115 publications

(66 citation statements)

References 17 publications

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“…A lot of research has been conducted on the theoretical models of double-skinned HSCFST columns (Tao, Han 2006;Tan, Zhang 2010;Uenaka et al 2010;Hu, Su 2011). Nevertheless, the theoretical models were mainly for columns without external confinement.…”

Section: Theoretical Model For Confined Double-skinned Cfst Columnsmentioning

confidence: 99%

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Theoretical Model for Double-Skinned Concrete-Filledsteel-Tubular Columns With External Confinement

Dong

2015

Journal of Civil Engineering and Management

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Recent advances in the production of super-fine cement and filler technology has made the production of high-strength concrete (HSC) of 120 MPa practicable in the industry. Nonetheless, the application of such HSC in real construction is still limited. One of the reasons that inhibits the use of HSC is the brittleness, which causes HSC structures to fail explosively if the concrete confinement is not adequate. The traditional method of installing transverse steel as confinement is not feasible in HSC structures, as the steel will be too congested to ensure proper concrete placing. To overcome the problem, double-skinned high-strength concrete-filled-steel-tubular (HSCFST) columns has been advocated, which could provide large, continuous and uniform confinement to HSC. However, a major shortcoming of the double-skinned HSCFST columns is the imperfect interface bonding that occurs at the elastic stage that reduces the elastic strength and stiffness of columns. To improve the situation, the authors have verified previously that using external steel rings on the outer steel tube can successfully restrict the dilation of HSCFST columns and thus restore an intact interface bonding condition. As a continued study, the authors will in this paper develop a theoretical model for predicting the uni-axial load-carrying capacity of doubled-skinned HSCFST columns.

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Section: Theoretical Model For Confined Double-skinned Cfst Columnsmentioning

confidence: 99%

“…Previously, some research work has been done on the theoretical model for double-skinned HSCFST columns Tao et al 2004;Huang et al 2010;Tan, Zhang 2010;Uenaka et al 2010;Zhao et al 2010;Hu, Su 2011). However, there was no such model proposed for double-skinned HSCFST columns containing external confinement.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Model for Double-Skinned Concrete-Filledsteel-Tubular Columns With External Confinement

Dong

2015

Journal of Civil Engineering and Management

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“…The concrete confinement effect in CFDST is rigorously evaluated by these authors, studies [6][7][8][9] have used numerical means to determine the confinement effect, which is validated against experimental results. Here, concrete confining stress is given utmost priority in research findings, as CFST got the limelight due to its inherent ability to enhance the core concrete strength at higher strain levels.…”

Section: Introductionmentioning

confidence: 99%

Investigations on global buckling behaviour of concrete-filled double-skinned steel tubular columns

Sulthana

Jayachandran

2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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Concrete-Filled Double-skinned Steel Tubular columns (CFDST) are proved to possess exceptional structural resistance in case of fire and multi-hazard situations. This superior quality of CFDST makes it preferable in long column applications. However, studies on the long column behaviour of CFDST is very few, and their results are not in line with the behaviour of CFST long columns. Whereas, several researches on stub column CFDST shows that, the axial compression behaviour of CFDST is similar to CFST. In this paper, selected results (4 numbers of circular CFDST specimens) from a large test data is presented. Axial compression behaviour of long column CFDST specimens is studied, with non-dimensional slenderness λ around 1.0, and hollowness ratio as the governing parameter for study. Test results namely, axial load carrying capacity, axial deformation and lateral deflection are presented in this paper. Numerical models are also developed and validated with the experimental results, to carry out more parametric studies. Further, the experimental axial capacity values are compared with modified capacity equations from EC4 and AISC. Results show that extended EC4 and AISC equations gives conservative predictions for CFDST column even in the long column range. Moreover, the initial imperfections in the specimen and their corresponding boundary conditions for load application, are found to be governing parameters in long column buckling study.

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“…when the width-to-thickness ratio was large. Later on, Hu and Su [11] established empirical equations to predict the lateral confining pressure exerted on the concrete core.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear behavior of FRP-reinforced concrete-filled double-skin tubular columns using finite element analysis

Talaeitaba

Halabian

Torki

2015

Thin-Walled Structures

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Nonlinear analysis of short concrete-filled double skin tube columns subjected to axial compressive forces

Cited by 115 publications

References 17 publications

Theoretical Model for Double-Skinned Concrete-Filledsteel-Tubular Columns With External Confinement

Theoretical Model for Double-Skinned Concrete-Filledsteel-Tubular Columns With External Confinement

Investigations on global buckling behaviour of concrete-filled double-skinned steel tubular columns

Nonlinear behavior of FRP-reinforced concrete-filled double-skin tubular columns using finite element analysis

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