Bond behavior of concrete-filled steel tube columns using manufactured sand (MS-CFT)

Guan, Minsheng; Lai, Zhichao; Xiao, Qian; Du, Hongbiao; Zhang, Kun

doi:10.1016/j.engstruct.2019.02.054

Cited by 31 publications

(14 citation statements)

References 14 publications

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“…The slip corresponding to the peak load (S u ) increased almost linearly with the D/t ratio, as shown in Figure 10. The observation of the variation tendency of bond stress (τ u ) and slip corresponding to peak load (S u ) of CFT-PAC with D/t ratio were similar to the circular steel tube filled with other types of concrete [16,30,45]. Figure 10 presented the variation of bond stress (τu) and slip corresponding to peak load (Su) with D/t ratio.…”

Section: Axial and Lateral Strain Distributionssupporting

confidence: 54%

“…It could be found that bond stress-slip curves could be roughly divided into three branches: a branch with no slip, a branch which slip increased with rise of load, and a branch which load basically remained unchanged as the slip increased. As similar stress-slip curves had been reported on the CFT columns [46] and MS-CFT columns [45], the bond stress-slip relationship model for CFT columns and MS-CFT columns might be also utilized to depict the bond stress-slip relationship of CFT-PAC. In this research, an attempt to establish the relationship between the bond stress and slip of CFT-PAC following the existing bond stress-slip relationship of MS-CFT columns were given as follows:…”

Section: Bond Stress-slip Relationship Modelmentioning

confidence: 68%

“…When the load exceeded the bond load, the slip at both of the free end and the loaded increased continually while the load basically remained invariable. The load-slip curves could be divided into three stages: before critical load, critical load to bond load and after bond load, which was similar to the load-slip curves of normal concrete-filled steel tubes [16], manufactured sand concrete-filled steel tube [45] and recycled aggregate concrete-filled steel tube [30]. Before critical load, the bond resistance was mainly provided by chemical adhesion.…”

Section: Methodsmentioning

confidence: 84%

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Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Zhou

et al. 2020

Materials

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In order to investigate the bond behavior of preplaced aggregate concrete-filled steel tube (CFT-PAC) columns and the difference of bond behavior between CFT-PAC columns and normal concrete-filled steel tube (CFT-NC) columns, a total of 11 columns were prepared and the push-out tests were conducted. The experimental parameters included the type of concrete (preplaced aggregate concrete and normal concrete), concrete strength (C40, C50 and C60), cross-section dimension (D = 219 mm, 299 mm and 351 mm) and the thickness of steel tube (t = 6 mm and 8 mm). The results indicated that the CTF-PAC columns had a similar load-slip curves with CFT-NC columns. The bond stresses of the CFT-PAC columns were higher than that of the PAC-NC columns at the same concrete strength. Increasing compressive strength of PAC increased the critical bond strength and bond strength of CFT-PAC columns. With an increase of the L/D ratio, both of the slip corresponding to peak load and bond strength of CFT-PAC columns exhibited an increasing trend. A rise in the D/t ratio led to a decrease in the bond stress of CFT-PAC columns and an increase in slip corresponding to the peak load of CFT-PAC columns. The proposed bond stress–slip relationship model considerably matched the bond stress–slip relationship of CFT-PAC columns.

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Section: Axial and Lateral Strain Distributionssupporting

confidence: 54%

Section: Bond Stress-slip Relationship Modelmentioning

confidence: 68%

Section: Methodsmentioning

confidence: 84%

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Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Zhou

et al. 2020

Materials

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“…Various other comparative studies have been introduced in the literature in proving the performance of machine-made sand such as Gonçalves et al [7], Yamei et al [8] or Mundra et al [9]. Therefore, manufactured sand has currently caught great attention from researchers, as well as the whole construction industry [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, many works have focused on the quantification of how the concrete workability and durability could be influenced by using manufactured sand [6,12], especially its compressive behavior [1,11,[13][14][15]. In a series of papers, Shen et al [3,13] have identified the influence of the shape of manufactured sand and roughness on the concrete compressive strength based on digital image analysis and experimental compression tests.…”

Section: Introductionmentioning

confidence: 99%

Improvement of ANFIS Model for Prediction of Compressive Strength of Manufactured Sand Concrete

Pham

Dao

et al. 2019

Applied Sciences

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Use of manufactured sand to replace natural sand is increasing in the last several decades. This study is devoted to the assessment of using Principal Component Analysis (PCA) together with Teaching-Learning-Based Optimization (TLBO) for enhancing the prediction accuracy of individual Adaptive Neuro Fuzzy Inference System (ANFIS) in predicting the compressive strength of manufactured sand concrete (MSC). The PCA technique was applied for reducing the noise in the input space, whereas, TLBO was employed to increase the prediction performance of single ANFIS model in searching the optimal weights of input parameters. A number of 289 configurations of MSC were used for the simulation, especially including the sand characteristics and the MSC long-term compressive strength. Using various validation criteria such as Correlation Coefficient (R), Root Mean Squared Error (RMSE), and Mean Absolute Error (MAE), the proposed method was validated and compared with several models, including individual ANFIS, Artificial Neural Networks (ANN) and existing empirical equations. The results showed that the proposed model exhibited great prediction capability compared with other models. Thus, it appeared as a robust alternative computing tool or an efficient soft computing technique for quick and accurate prediction of the MSC compressive strength.

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Effect of self‐compacting concrete infill on the flexural behavior of hollow channel sections: Experimental and numerical studies

P.S

Kannan²

2021

Structural Concrete

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Use of hollow cold‐formed steel (CFS) sections has gained popularity in the construction of light industrial and commercial structures. However, their overall load carrying capacity under flexure can be severely affected due to the possible buckling failure modes. Addition of concrete as an infill material for hollow CFS sections can significantly improve their overall performance by resisting their inward local buckling. In this paper, the effectiveness of self‐compacting concrete (SCC) as an infill material for hollow channel sections (HCS) is investigated under flexure. In total, nine full‐scale hollow channel sections with and without SCC infill are tested to understand the effect of different parameters namely (i) width to depth ratio, (ii) section thickness, and (iii) developed length. In addition, a detailed nonlinear finite element (FE) modeling was performed using the software ABAQUS. Moreover, an analytical investigation was performed to determine the ultimate moment capacity of SCC infilled sections using the strain compatibility procedure. Test results revealed that the addition of SCC infill helped in increasing the ultimate moment resistance by more than 100% when compared to the specimens with no infill. Moreover, the local buckling resistance of HCS is significantly improved due to the addition of SCC infill. The validated analytical and finite element models were used for performing an extensive parametric investigation.

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Bond behavior of concrete-filled steel tube columns using manufactured sand (MS-CFT)

Cited by 31 publications

References 14 publications

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Improvement of ANFIS Model for Prediction of Compressive Strength of Manufactured Sand Concrete

Effect of self‐compacting concrete infill on the flexural behavior of hollow channel sections: Experimental and numerical studies

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