The structural performance of axially loaded CFST columns under various loading conditions

Huang, Fuyun; Yu, Xinmeng; Chen, Baochun

doi:10.12989/scs.2012.13.5.451

Cited by 39 publications

(15 citation statements)

References 9 publications

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Section: Parametric Analysis Of the Reduction Factorcontrasting

confidence: 52%

“…However, for an arch with rise-to-span ratio less than 0.25, the effect of ISL on K p is much larger (up to 25%). This reduction is slightly larger than the comparable values reported for CFST columns (Huang et al, 2012(Huang et al, , 2016Li et al, 2012;Liew and Xiong, 2009). Comparing Figure 18 (a) and (b), it can be found that, under different loading modes, the pattern of initial stress influence on ultimate bearing capacity is basically similar.…”

Section: Loading Configurationcontrasting

confidence: 49%

“…where s 0 and e 0 are the initial stress and strain in the steel tube, respectively; f s and e s are the yield strength and yield strain of the steel tube, respectively. The preloading issues of CFST column had attracted many researchers' attention and were widely studied in experimental or finite element (FE) theoretical studies (Goode, 2006;Han and Yao, 2003;Huang et al, 2012Huang et al, , 2013Huang et al, , 2015Huo et al, 2011;Li et al, 2012Li et al, , 2013Liew and Xiong, 2009;Qing and Muhammad, 2013;Shi et al, 2012;Xiong and Zha, 2007;Yang and Han, 2009). From these works, it can be concluded that the preloading on the steel tube can affect the behavior of CFST slender beam-column significantly, such as accelerating the yielding of the steel tube, degrading the confinement effect on the concrete core, and reducing the ultimate loading (UL) capacity of the CFST column; therefore, it must be taken into account in design.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Huang

Cui

Dong

et al. 2019

Advances in Structural Engineering

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When casting wet concrete into hollow steel tubular arch during the construction process of a concrete-filled steel tubular arch bridge, an initial stress (due to dead load, etc.) would be produced in the steel tube. In order to understand the influence of this initial stress on the strength of the concrete-filled steel tubular arch bridge, a total of four single tubular arch rib (bare steel first) specimens (concrete-filled steel tubular last) with various initial stress levels were constructed and tested to failure. The test results indicate that the initial stress has a large influence on the ultimate load-carrying capacity and ductility of the arch structure. The high preloading ratio will reduce significantly the strength and ductility that the maximum reductions are over 25%. Then, a finite element method was presented and validated using the test results. Based on this finite element model, a parametric study was performed that considered the influence of various parameters on the ultimate load-carrying capacity of concrete-filled steel tubular arches. These parameters included arch slenderness, rise-to-span ratio, loading method, and initial stress level. The analysis results indicate that the initial stress can reduce the ultimate loading capacity significantly, and this reduction has a strong relationship with arch slenderness and rise-to-span ratio. Finally, a method for calculating the preloading reduction factor of ultimate load-carrying capacity of single concrete-filled steel tubular arch rib structures was proposed based on the equivalent beam–column method.

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Section: Parametric Analysis Of the Reduction Factorcontrasting

confidence: 52%

Section: Loading Configurationcontrasting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Huang

Cui

Dong

et al. 2019

Advances in Structural Engineering

Self Cite

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“…The M5P process afforded to maximize a measure called the standard deviation reduction (SDR) [34]. The 136 samples of STCC columns were derived from [7,9,[35][36][37][38][39][40][41][42][43] to build the AI models. STCC columns were infilled with the normal strength concrete ( f c ≤ 60 MPa), high strength concrete (60 MPa < f c ≤ 120 MPa), and ultra high strength concrete ( f c > 120 MPa).…”

Section: M5pmentioning

confidence: 99%

Prediction of axial strength in circular steel tube confined concrete columns using artificial intelligence

Ngo

Pham

Hoang

et al. 2021

STCE

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In recent years, together with the boom of the industrial revolution 4.0, terms such as artificial intelligence (AI) are gradually gaining popularity engineering domain. This study proposed a number of AI models for predicting the axial strength in circular steel tube confined concrete (STCC) columns. Particularly, artificial neural networks (ANNs), support vector regression (SVR), linear regression (LR), and M5P were applied in this study. This study applied 136 samples of short and intermediate STCC columns infilled with normal strength concrete, high strength concrete, or ultimate high strength concrete to evaluate the AI models. Compressive strengths of concrete cylinders was ranged from 23.20 Mpa to 188.10 Mpa. The AI models were assessed by statistical indexes including MAPE, MAE, RMSE, and R. The analytical results revealed that the M5P the most effective AI model comparing to others. Comparing with the other models, predicted data obtained by the M5P model show the highest agreement with the actual data in predicting the axial strength of STCC columns. Particularly, the MAPE and R of M5P models were 10.62% and 0.977 respectively. Similarly, the RMSE by the M5P model was 330.38 kN which is the lowest value among 419.39 kN by the LR model, 337.84 kN by the ANNs model, and 857.11 kN by the SVR model. Therefore, the M5P model can be considered as a useful tool to accurately predict the compressive capacity of the STCC columns. Keywords: artificial intelligence; circular steel tube confined concrete columns; axial strength; support vector regression.

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“…A study was carried out (11) on Analytical behaviour of CFDST circular stub column. Finite element model is created and its sectional capacity is checked.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Concrete Filled Double Skin (CFDS) Steel Tube by Partial Replacement of Coarse Aggregate with Brickbats

Sundar¹,

S²,

G³

2021

IJST

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Objectives: To find the optimum percentage replacement of brickbats in concrete by performing fresh and hardened concrete tests and is incorporated into CFDS steel tube column to study its behaviour analytically. Methods: The behaviour of a double skin CFST column with brickbats partially substituting the coarse material with Brickbats. Part of the coarse aggregate was replaced with grouted class I brick bats with percentages of 5 to 25%. A study of the compressive and split tensile strength of concrete was conducted fresh and hardened tests on concrete specimens (cubes and cylinders). Performance of CFDS steel tube column partially replacing coarse aggregate with brickbats is examined analytically using ANSYS. Findings: The compressive and split tensile strength of 10 percent replacement brickbats improved by 8.5 and 13 percent, respectively, while the compressive and split tensile strength of 5 percent replacement brickbats increased by 1.67 and 6 percent, respectively. When compared to nominal cube strength, partially replace brickbats compressive strength increases gradually up to 10% brickbat replacement and then tends to decrease from 15percent brickbat replacement. When compared to different mixtures, it was discovered that adding 10% brickbats increases strength, and this amount was deemed the best mix proportion. The highest load taken by CFDS with 10% brickbats is 649.36kN, whereas standard CFDS is 705.16kN. The CFDS tube was replaced by CFDS tube, which took 1.15 percent more load than brick bats. Novelty/Applications: This research yields good result and can be adopted for the construction of tall composite buildings. This technique will be reduced the self -weight of the structure to some extent.

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The structural performance of axially loaded CFST columns under various loading conditions

Cited by 39 publications

References 9 publications

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Prediction of axial strength in circular steel tube confined concrete columns using artificial intelligence

Behaviour of Concrete Filled Double Skin (CFDS) Steel Tube by Partial Replacement of Coarse Aggregate with Brickbats

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