Numerical Investigation of the Composite Action of Axially Compressed Concrete-Filled Circular Aluminum Alloy Tubular Stub Columns

Ding, Fa‐xing; Lyu, Fei; Wang, En; Xu, Yunlong; Liu, Yicen; Feng, Yu; Shang, Zhihai

doi:10.3390/ma14092435

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…Moreover, the mutual protection of the steel tube and in-filled concrete gives CFST columns better fire [9], impact [10], and corrosion [11,12] resistances. Because of the above-mentioned advantages, composite structural columns based on similar concepts, such as recycled aggregate concrete-filled steel tube [13], concrete-filled aluminum alloy tube [14], lightweight concrete-filled steel tube [15], stirrup-confined concrete-filled steel tube [16,17], and concrete-filled dual steel tube columns [18], have been proposed in recent years to satisfy different design objectives for low carbon, good appearance, light weight, high strength, etc.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Axial Compressive Load–Strain Curves of Circular Concrete-Filled Steel Tube Columns Using Long Short-Term Memory Network

et al. 2023

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No study has been reported to use machine learning methods to predict the full-range test curves of circular CFST columns. In this paper, the long short-term memory (LSTM) network was introduced to calculate the axially compressive load–strain curves of the circular CFST columns according to an experiment database of limited scale. To improve the feasibility of input data for the recurrent neural network algorithm, data preprocessing methods and data configurations were discussed. The prediction results indicate that the LSTM network provides more accurate estimations compared with the artificial neural networks, random forest and support vector regression. Meanwhile, this method can be used to calculate the mechanical properties including the elastic modulus, ultimate bearing capacity, and the ductility of the columns with acceptable accuracy for engineering practice (the prediction error within 20%). For future research, it is expected that the machine learning method will be applied to predict the structural response of different members under various loading conditions.

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Section: Introductionmentioning

confidence: 99%

Prediction of Axial Compressive Load–Strain Curves of Circular Concrete-Filled Steel Tube Columns Using Long Short-Term Memory Network

et al. 2023

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“…A study led by Zeng et al analyzed the buckling or oblique shear failure of a CFAT under axial compression and proposed an axial compressive strength equation based on a confinement effect coefficient [26]. Using a triaxial plastic damage constitutive model of concrete and an elastic-plastic constitutive model of aluminum alloy, Ding et al [27] proposed an equation for estimating the ultimate strength of a column based on superposition. Some have subsequently proposed pouring concrete between two concentric aluminum tubes to form a concrete-filled double aluminum alloy tube (CFDAT) with a hollow center.…”

Section: Introductionmentioning

confidence: 99%

The Strength in Axial Compression of Aluminum Alloy Tube Confined Concrete Columns with a Circular Hollow Section: Experimental Results

Zhao

Zhang

Lü³

et al. 2022

Buildings

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Steel tube confined concrete (STCC) stub columns have great strength and facilitate construction. In this study, the axial compressive strength of an aluminum alloy tube confined concrete column with (ATCC-CHS) and without (ATCC) a circular hollow section was tested in laboratory experiments. The influence of concrete strength, diameter–thickness ratio and the hollow rate on the failure mode, ultimate compressive strength, strain, stiffness, constraint effects and ductility was quantified. The experiments showed that local buckling failure could be effectively delayed when the outer aluminum tube did not directly bear axial load. Columns without a circular hollow section had bearing capacities approximately 20% higher than those with a circular hollow section, though their ductility was poorer. The ultimate strength tended to increase with decreases in the hollow rate and diameter–thickness ratio. It tended to increase with increasing concrete strength, though stronger concrete also reduced ductility. The bearing capacities of the columns were calculated according to several proposed formulas and compared with the experimental results, and the proposed Teng and Attard’s formula appeared to be satisfactory.

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“…Extensive studies have been carried out on CFST columns subjected to axial compression [ 16 , 17 , 18 , 19 ] and compression-bending loads [ 20 , 21 , 22 ]. In addition, some scholars have started experimental and numerical explorations into the compression-torsion behaviors of circular CFST columns.…”

Section: Introductionmentioning

confidence: 99%

Finite Model Analysis and Practical Design Equations of Circular Concrete-Filled Steel Tube Columns Subjected to Compression-Torsion Load

et al. 2021

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The objective of this study is to investigate the mechanical properties and the composite action of circular concrete-filled steel tube (CFST) columns subjected to compression-torsion load using finite element model analysis. Load–strain (T–γ) curves, normal stress, shear stress, and the composite action between the steel tubes and the interior concrete were analyzed based on the verified 3D finite element models. The results indicate that with the increase of axial force, the maximum shear stress at the core concrete increased significantly, and the maximum shear stress of the steel tubes gradually decreased. Meanwhile, the torsional bearing capacity of the column increased at first and then decreased. The torque share in the columns changed from the tube-sharing domain to the concrete-sharing domain, while the axial force of the steel tube remained unchanged. Practical design equations for the torsional capacity of axially loaded circular CFST columns were proposed based on the parametric analysis. The accuracy and validity of the proposed equations were verified against the collected experimental results.

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Numerical Investigation of the Composite Action of Axially Compressed Concrete-Filled Circular Aluminum Alloy Tubular Stub Columns

Cited by 17 publications

References 31 publications

Prediction of Axial Compressive Load–Strain Curves of Circular Concrete-Filled Steel Tube Columns Using Long Short-Term Memory Network

Prediction of Axial Compressive Load–Strain Curves of Circular Concrete-Filled Steel Tube Columns Using Long Short-Term Memory Network

The Strength in Axial Compression of Aluminum Alloy Tube Confined Concrete Columns with a Circular Hollow Section: Experimental Results

Finite Model Analysis and Practical Design Equations of Circular Concrete-Filled Steel Tube Columns Subjected to Compression-Torsion Load

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