Concrete-filled spiral-welded stainless-steel tube long columns under concentric and eccentric axial compression loading

Gunawardena, Yasoja; Aslani, Farhad

doi:10.1016/j.jcsr.2019.07.006

Cited by 19 publications

(8 citation statements)

References 21 publications

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“…(6) The increase of slenderness ratio aggravated the degradation of axial compression performance of PCSCFST column, which was the same as that of continuous CFST columns. (7) With the increase of steel tube thickness, concrete strength, bolt diameter, reduction of member length, and pure bolt connection instead of bolt and weld combination connection, the deformation resistance of bolts had been enhanced.…”

Section: Discussionmentioning

confidence: 99%

“…Besides modifying formula (7), it was also considered that the axial bearing capacity under 0.1 axial strain may not be feasible in practical design. Therefore, in this model, the strength corresponding to 0.05 axial strain was regarded as the bearing capacity of normalstrength concrete-filled-steel-tube (NSCFST) column, which showed no strength degradation in the postelastic stage.…”

Section: Confined Cfst Columnmentioning

confidence: 99%

“…Moreover, the research of CFST had made considerable progress in terms of shape and structure, as well as compression methods and research methods in recent years. [3][4][5][6][7][8][9][10][11][12] Du et al 13 discovered the bottom of the steel tube is prone to local buckling. And as Lai and Ho's 14 research reported in 2012, as steel dilates more than concrete, the imperfect interface bonding during initial elastic phase, which results in the reduction in the elastic strength and also the initial stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the research of CFST had made considerable progress in terms of shape and structure, as well as compression methods and research methods in recent years. 3–12…”

Section: Introductionmentioning

confidence: 99%

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Axial compression behavior of precast circular semi-continuous concrete-filled steel tube columns

Cao

Xie

Zhu

et al. 2022

Advances in Mechanical Engineering

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To study the axial compression performance of precast circular semi-continuous concrete-filled steel tube (PCSCFST) column, a total of 17 specimens were prepared and tested, including 13 PCSCFST columns and 4 continuous CFST columns. This PCSCFST column is made up of upper and lower steel tubes and outer steel tubes connected by bolts, which has the advantages of easy factory production and convenient transportation. The results showed that shear failure occurred in continuous CFST columns, but not in PCSCFST columns, bolts had obvious influence on failure mode. Maintaining the consistency of the thickness of each steel tube on the specimen can not only improve the local buckling, but also avoid the short plate effect to give full play to the material performance. Moreover, with the increase of steel tube thickness, concrete strength, bolt diameter, reduction of specimen length and pure bolt connection instead of bolt and weld combination connection, the deformation resistance of bolts and axial compression performance of specimens had been enhanced. However, the increase of bolt diameter from 12 to 18 mm resulted in a better strength degradation rate, but worse bearing capacity and deformation resistance. Finally, the predictions of the ultimate bearing capacity of PCSCFST columns under axial compression agree well with the test results, the average value of Nexp/ Npre and the variance are 0.998 and 0.00111.

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Section: Discussionmentioning

confidence: 99%

Section: Confined Cfst Columnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Moreover, the research of CFST had made considerable progress in terms of shape and structure, as well as compression methods and research methods in recent years. 3–12…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Axial compression behavior of precast circular semi-continuous concrete-filled steel tube columns

Cao

Xie

Zhu

et al. 2022

Advances in Mechanical Engineering

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“…In addition, many researchers have also provided empirical design formulas to predict the ultimate axial load of circular CFST columns under axial loading, such as Giakoumelis and Lam, 13 Lin et al, 2 and Wang et al 30 Experimental tests on circular CFSST columns loaded axially were conducted by researchers previously. [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] The test results showed that circular CFSST columns have higher ultimate axial load and ductility due to the enhanced strain-hardening performance of stainless steel tube. The experimental test program reported in the literature examined the influences of a wide range of column parameters of CFSST columns under axial loading including the tube diameter, [31][32][33][35][36][37][38]40,[42][43][44][45][46]48 tube thickness, 33,35,38,44,47,49 concrete strength, [31][32]…”

Section: Introductionmentioning

confidence: 99%

Prediction of the ultimate axial load of circular concrete‐filled stainless steel tubular columns using machine learning approaches

Tran

Ahmed

Gohari

2023

Structural Concrete

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This paper investigates the accuracy of the existing empirical design models and different machine learning (ML) models, known as Decision Tree (DT), Random Forest (RF), K‐Nearest Neighbors (KNN), Adaptive Boosting (AdaBoost), Gradient Boosting Regression Tree (GBRT), and Extreme Gradient Boosting (XGBoost) in predicting the ultimate axial load of circular concrete‐filled stainless steel tubular (CFSST) columns under axial loading. A test database encompassing the test results of 142 CFSST columns is used to validate the accuracy of the existing empirical design and different ML models. It was demonstrated that all the ML models can provide a better estimation of the ultimate axial load than the existing empirical design models do, in which XGBoost can provide the best estimation of the ultimate axial load of CFSST columns. Finally, a simple equation is proposed based on the XGBoost model for the practical design of CFSST columns.

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Performance of circular bimetallic tube confined concrete slender columns under eccentric compression

Gao

Guo

2021

Archiv.Civ.Mech.Eng

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Concrete-filled spiral-welded stainless-steel tube long columns under concentric and eccentric axial compression loading

Cited by 19 publications

References 21 publications

Axial compression behavior of precast circular semi-continuous concrete-filled steel tube columns

Axial compression behavior of precast circular semi-continuous concrete-filled steel tube columns

Prediction of the ultimate axial load of circular concrete‐filled stainless steel tubular columns using machine learning approaches

Performance of circular bimetallic tube confined concrete slender columns under eccentric compression

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