Axial compressive behaviour of concrete-filled double-tube stub columns with stiffeners

Wang, Zhibin; Tao, Zhong; Yu, Qing

doi:10.1016/j.tws.2017.08.025

Cited by 123 publications

(47 citation statements)

References 24 publications

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“…CFST has the capacity of high ductility and large energy absorption [4], which leads to the perfect seismic resistance of CFST [5]. Many studies have been conducted to investigate the mechanical performance of CFST [6][7][8][9][10][11]. Bond strength of the CFST has been investigated by scholars [12,13].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

et al. 2019

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Forty-eight circular concrete-filled steel tube (CFST) columns subjected to lateral impact were tested to investigate the behavior of circular CFST columns under axial compressive load. Analyses of effects of concrete compressive strength, impact location and impact energy on residual ultimate axial capacity, ductility and initial stiffness are provided in this paper. It is found that lateral impact has negative effects on residual ultimate axial capacity of circular CFST columns from test results. Residual ultimate axial capacity decreases as impact energy increases and impact location comes close to the end of the specimen. It is also found that increasing concrete compressive strength can reduce the negative effects of impact location on residual ultimate axial capacity. Ductility and the initial stiffness of circular CFST columns decrease as impact energy increases. Ductility and the initial stiffness increase as impact location varies from middle-length to the end of specimens. When impact energy and impact location are constant, the ductility of the specimen with 30 MPa of concrete compressive strength is better than that of other specimens with different compressive strength. Besides, analyses of strain developments for 12 typical specimens to investigate failure modes under axial compressive load are provided in this paper. Strain developments have indicated that the steel at impact location becomes plastic faster than that at other locations. Based on the test results, a calculation formula is presented to predict the residual ultimate axial capacities of circular CFST columns subjected to lateral impact, and good agreement with experimental results has been achieved.

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Section: Introductionmentioning

confidence: 99%

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

et al. 2019

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“…The constraint effect of the multi-cavity steel tube at the internal partition plate is weaker than that at the diagonal point, where the maximum stress reaching 98 MPa. From the analysis of the overall stress mechanism, the compression mechanism of the multi-cavity steel tube shear wall is similar to that of the rectangular steel tube [31] concrete, but due to the existence of the inner partition plate, the concrete is more restrained.…”

Section: Analysis Of Compression Performance Of Axis Compression Membersmentioning

confidence: 99%

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Sun

Zhang

et al. 2019

Energies

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In this paper, five groups of C40 fly ash and silica fume self-compacting concrete (SCC) mix proportion tests and in-line multi-cavity steel tube bundle self-compacting concrete shear wall axial compression performance tests and numerical simulation are completed and presented. The influence of fly ash and silica fume additions on SCC mechanical properties and the filled in-line multi-cavity steel tube bundle shear wall mechanical properties are analyzed and studied. With an increase in the fly ash content from 10% to 40%, the compressive strength of self-compacting concrete increases firstly and then decreases. When the fly ash content is 30% and the silica fume content is 4%, the compressive strength of the 28 d age self-compacting concrete is the highest and the compressive strength formula of the wrapped curing SCC is proposed. The failure of steel tube bundle is multi-wave buckling failure. As the SCC is most obviously affected by the collar at the corner point of the steel tube bundle, its compressive strength is 110 MPa, and is 96 MPa higher than the concrete at the middle point of the web. The deformation resistance of SCC is obviously enhanced by the confinement effect.

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“…Two loading end plates were included in the ISSCC column FE model, and the reference points coupled with the surface of loading end plates were assigned to control the displacement-controlled loads and degrees of freedom. e degree of freedom at the bottom reference point was restrained in translations, and the top reference point was allowed to displace in the loading direction [21]. Both material and structural nonlinearities were considered, and the static general method was used in the solution process.…”

Section: Load and Boundarymentioning

confidence: 99%

“…e research showed that the restraint effect of the steel pipe on the core concrete and the bearing capacity and ductility of the CFST columns have been improved. Wang et al [21] studied a new stiffened concretefilled steel column made of welded channel steels, the research showed that the confinement of the steel tube to the core concrete was obviously strengthened at the corner, and the bearing capacity and ductility of the members were obviously improved. Ding et al [5] investigated the behavior of steelreinforced concrete-filled square steel tubular stub columns.…”

Section: Introductionmentioning

confidence: 99%

Behavior of an Innovative Square Composite Column Made of Four Steel Tubes at the Corners and Corrugated Steel Batten Plates on all Sides

Wang

Zou

Kang

et al. 2019

Advances in Civil Engineering

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Steel-concrete composite (SCC) columns have widely been applied in modern construction industry owing to the composite action between the concrete and the steel. The benefits of SCC columns can be further achieved if the confinement effect of concrete is applied. Therefore, this paper presents an innovative square steel-concrete composite (ISSCC) column made of four steel tubes at the corners and corrugated steel batten plates on all sides. Through the experimental and finite element (FE) numerical simulation calculations, the axial compression performance and seismic performance of the ISSCC column were discussed, and the FE model was verified through experimental results. The seismic performance of the ISSCC column was compared and analyzed with reinforced concrete column under different axial compression ratios. The research showed that FE models can accurately simulate the deformation, stress, and failure states of the ISSCC column under axial pressure and horizontal low cyclic load. Furthermore, the ISSCC column performed good ductility and energy dissipation capacity, and the seismic performance index was better than the reinforced concrete column and had better seismic performance. The results of this study can provide reference for the design and development of the new composite column.

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Axial compressive behaviour of concrete-filled double-tube stub columns with stiffeners

Cited by 123 publications

References 24 publications

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Behavior of an Innovative Square Composite Column Made of Four Steel Tubes at the Corners and Corrugated Steel Batten Plates on all Sides

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