Tests on elliptical concrete filled steel tubular (CFST) beams and columns

Ren, Qingxin; Han, Lin-Hai; Lam, Dennis; Li, Wei

doi:10.1016/j.jcsr.2014.03.010

Cited by 64 publications

(42 citation statements)

References 16 publications

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“…The three main experimental studies used for validation of the numerical model and the assessment of design proposals in the present study are [34][35][36]. The geometric and material properties, reinforcement ratios , nondimensional slenderness  (defined in Section 4.1) and ultimate loads recorded by [34][35][36] are summarised in Table 1. The cross-sectional geometry of the tested specimens is shown in Figure 1.…”

Section: Review Of Experimental Studies On Cfehs Membersmentioning

confidence: 99%

“…The cross-sectional geometry of the tested specimens is shown in Figure 1. A total of 48 tests from [34][35][36] were used for validation of the numerical model presented in Section 3.…”

Section: Review Of Experimental Studies On Cfehs Membersmentioning

confidence: 99%

“…The model was validated against the experimental results of [34][35][36] by comparing ultimate loads, load-deflection behaviour and failure modes. Once satisfactory agreement between the experimental and numerical results was achieved, an extensive parametric study comprising 360 simulations was conducted, in which the cross-sectional geometry, reinforcement ratio, reinforcement cover, column slenderness and load eccentricity were varied.…”

Section: Numerical Analysismentioning

confidence: 99%

“…In order to assess the accuracy of the numerical model, comparisons were made between the ultimate loads and load-displacement curves obtained from a series of experiments [34][35][36] and those predicted by the numerical model. A group of the experimental results [33] were not used for the model validation owing to some unexpected trends in some of the reported data.…”

Section: Validation Of Fe Modelmentioning

confidence: 99%

“…These studies provided a basis upon which design rules for steel EHS members have been formulated [28], including rules for compressive resistance [21], bending [23], flexural buckling [24] and shear [29]. In the context of concrete-filled elliptical hollow section (CFEHS) members, previous experimental studies include compression testing of stub columns [4,30,31], members in bending [32], concentrically-loaded slender columns [33] and eccentrically-loaded columns [34][35][36][37]. The behaviour of CFEHS columns in fire conditions was also examined by [35].…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Qiu

McCann

Espinós

et al. 2017

Engineering Structures

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A numerical model simulating the behaviour of elliptical concrete-filled columns under either concentric or eccentric compressive load has been developed in ABAQUS. The numerical results have been compared against a range of experimental results for ultimate load, load-deflection behaviour and failure modes, with good agreement observed. An extensive parametric study has been undertaken whereby the slenderness, load eccentricity, cross-sectional geometry and reinforcement ratio of the concrete-filled columns were varied, creating a data set upon which to formulate design guidance since currently there are no specific provisions in the European Standard EN 1994-1-1 [1] for the design of concrete-filled steel elliptical section columns or beam-columns. It is shown Qiu, W., McCann, F., Espinos, A., Romero, M. L. and Gardner, L. (2017

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Section: Review Of Experimental Studies On Cfehs Membersmentioning

confidence: 99%

“…The cross-sectional geometry of the tested specimens is shown in Figure 1. A total of 48 tests from [34][35][36] were used for validation of the numerical model presented in Section 3.…”

Section: Review Of Experimental Studies On Cfehs Membersmentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

Section: Validation Of Fe Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Qiu

McCann

Espinós

et al. 2017

Engineering Structures

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Axial compressive behaviors of circular steel slag concrete‐filled steel tube slender columns

Tao

Zhang

et al. 2023

Structural Concrete

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This study aims to investigate the feasibility of using steel slag aggregate in concrete‐filled steel tubes by conducting axial compression tests on five groups of 10 circular steel slag concrete‐filled steel tube (SSCFST) slender columns. The failure mode, load–deformation curve, load–strain curve, axial bearing capacity, initial axial stiffness and ductility of the columns are analyzed. The effects of the steel slag replacement ratio and slenderness ratio on the axial compressive behaviors of the specimens are also quantified. These test results are employed to verify the reliability of a finite element model of the circular SSCFST slender columns established using Abaqus software. Then, a parametric analysis is conducted to explore the factors affecting the axial compressive behaviors of circular SSCFST slender columns. Moreover, the prediction accuracy of the existing design methods for the axial bearing capacity of circular SSCFST slender columns is evaluated. The results demonstrate that the ultimate bearing capacity of the specimens decreases by 2.3% and 3.1% on average, the initial stiffness decreases by 2.8% and 3.5%, and the ductility index decreases by 1.2% and increases by 1.6%, respectively, when the steel slag replacement ratio increases from 0 to 50% and 100%. The ultimate bearing capacity of the specimens decreases by 11.1% and 37.1% on average, the initial stiffness decreases by 6.3% and 28.8%, and the ductility index decreases by 5.1% and 12.2%, respectively, when the specimen slenderness ratio increases from 40 to 60 and 80. The confinement factor and slenderness ratio play a significant role in determining the axial compressive behaviors of SSCFST slender columns. The accuracy of the formulas provided in TCECS 625‐2019 and by Han is demonstrated in predicting the axial bearing capacity of circular SSCFST slender columns.

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Universal boosting ML approaches to predict the ultimate load capacity of CFST columns

Nguyen,

Le Nguyen,

2023

Structural Design Tall Build

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SummaryEstablishing a universal machine learning (ML) model in structural engineering is vital for understanding how various parameters, like geometry and material properties, influence a structure's behavior. This study aims to create a comprehensive ML model that considers the impact of different cross‐sectional parameters on the ultimate load capacity (ULC) of concrete‐filled steel tube (CFST) columns. This model assists engineers in making informed design decisions. The study employs a large dataset of 3094 data points with diverse geometric and material properties of CFST columns. After adjusting input features, robust boosting ML models (Catboost, LightGBM, and XGB) are meticulously fine‐tuned using grid search and fivefold cross‐validation. Monte Carlo simulation is used for further assessment. The results demonstrate that the most accurate XGB model delivers impressive accuracy, comparable to or better than existing literature models that focused on a single CFST column cross‐section. The chosen XGB model is then utilized for feature importance analysis, local performance assessment, and sensitivity analysis through 1‐D and 2‐D partial dependence plots. These analyses help assess the input's contribution and effect on ULC prediction for CFST columns.

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Tests on elliptical concrete filled steel tubular (CFST) beams and columns

Cited by 64 publications

References 16 publications

Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns

Axial compressive behaviors of circular steel slag concrete‐filled steel tube slender columns

Universal boosting ML approaches to predict the ultimate load capacity of CFST columns

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