Eccentric load behavior of L-shaped CFT stub columns with binding bars

Zuo, Zhi‐Liang; Cai, Jianguo; Yang, Chun; Chen, Qingjun

doi:10.1016/j.jcsr.2011.11.003

Cited by 85 publications

(22 citation statements)

References 13 publications

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“…Lin (2009) conducted experiments of CFLST columns with rib stiffeners subjected to eccentric load. Zuo et al (2012b) performed experiments of CFLST stubs with binding bars subjected to biaxially eccentric compression.…”

Section: Details Of Specimensmentioning

confidence: 99%

Experimental Study on Seismic Behavior of Concrete-Filled L-Shaped Steel Tube Columns

Shen

Lei

et al. 2013

Advances in Structural Engineering

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Concrete-filled L-shaped steel tube columns can be used to save architectural space at room corners, and may have many advantages of structural behavior of common concrete-filled steel tubes as columns. In this paper, the seismic behavior of concrete-filled L-shaped steel tube columns (CFLSTs) was investigated. Six specimens subjected to a constant axial load and cyclically varying lateral loading were tested to study the effects of width to depth ratio of section, depth to thickness ratio of steel tube and axial load level on the strength, as well as stiffness, ductility and energy dissipation of CFLST columns. Experimental results showed that the displacement ductility of CFLST columns decreased significantly with the increase of axial load level, and the strength and stiffness degradations of CFLST columns were more significant with higher axial load level. With the increase of depth-thickness ratio of steel tube and depth-width ratio of section, the ductility and the lateral ultimate load-carrying capacity of CFLST columns also decreased gradually. All CFLST columns exhibited favorable energy dissipation and ductility, even for the columns subjected to high axial load, which indicates that this type of composite columns is adoptable in practical engineering, especially in seismic regions.

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Section: Details Of Specimensmentioning

confidence: 99%

Experimental Study on Seismic Behavior of Concrete-Filled L-Shaped Steel Tube Columns

Shen

Lei

et al. 2013

Advances in Structural Engineering

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“…Experiment results indicated that the ductility of SS-CFST column was increased considerably by changing the local buckling mode of steel tube, and the inner corners almost failed to confine the concrete due to the separation between the steel tube and the core concrete. Zuo et al [18][19][20][21] ran axial and eccentric compressive tests and cyclic loaded tests on T-shaped and L-shaped CFST columns with binding bars to deduce their bearing capacity calculation formulas. It was observed that the local buckling failure modes are changed, the occurrence of local buckling is delayed, and the global outward bulge of the steel tube at the concave corners can be effectively restrained by setting binding bars.…”

Section: Introductionmentioning

confidence: 99%

Performance of Special‐Shaped Concrete‐Filled Square Steel Tube Column under Axial Compression

Wang

Zhou

Wei

et al. 2020

Advances in Civil Engineering

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The axial compressive performance of novel L-shaped and T-shaped concrete-filled square steel tube (L/T-CFSST) column was assessed in this study. Ten L/T-CFSST columns were tested to failure under axial load. The experimental data were used to determine various failure modes, bearing capacities, and load-displacement curves. The test parameters included the section form, steel tube thickness, steel yield strength, and slenderness ratio. The axial compressive performance of the L/T-CFSST column proved favorable, and each square steel tube showed strong cooperative performance. The failure mode of the stub column specimen (H/D ≤ 3) was strength failure caused by local buckling of the steel tube and that of the medium-long column member (H/D > 3) was instability failure caused by overall bending of the specimen. A finite element analysis (FEA) model was established and successfully validated by comparison against the test results. Based on the FEA model, parametric analyses were conducted to investigate the effects of steel tube thickness, concrete strength, steel yield strength, and slenderness ratio. The ultimate loads obtained from the experiments and FEA were compared to the results calculated by the available design codes. A formula was established to calculate the axial compressive strength and stability bearing capacity of the L/T-CFSST column accordingly. The calculation results are in close agreement with the FEA and experimental results, and the proposed formula may provide a workable reference for practicing engineers.

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“…Tao et al [10] proposed the stiffened concrete-filled thin-walled hollow steel structural (HSS) stub column, which can alleviate local buckling and improve the bearing capacity of square and rectangular concrete-filled steel tubular columns, but it has no obvious effect on ductility. Cai et al [11][12][13][14][15][16][17][18][19][20] investigated the steel tube with binding bars, and horizontal restraint rods were installed along the steel tube wall. 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.…”

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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Eccentric load behavior of L-shaped CFT stub columns with binding bars

Cited by 85 publications

References 13 publications

Experimental Study on Seismic Behavior of Concrete-Filled L-Shaped Steel Tube Columns

Experimental Study on Seismic Behavior of Concrete-Filled L-Shaped Steel Tube Columns

Performance of Special‐Shaped Concrete‐Filled Square Steel Tube Column under Axial Compression

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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