Numerical modelling of the in-plane behaviour of concrete-filled circular steel tubular arches

Han, Xu; Fernando, Dilum; Han, Bing

doi:10.1016/j.conbuildmat.2020.120693

Cited by 8 publications

(6 citation statements)

References 45 publications

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“…Moreover, the eccentric distance e and the slenderness ratio λ also have important influence on the ultimate load, therefore, it is necessary to analyze the two parameters. According to the analysis above, the main parameters taken into consideration in the parametric analysis are listed as follows: (1) To study the influence of ξ, two kinds of exterior diameter of steel tubes were analyzed, that is, D o = 400 mm and D o = 300 mm; (2) To study the influence of ρ, specimens with four different kinds of ρ, namely the CFSTs, the CFSTs with steel angles' type of L40 Â 4, L50 Â 6, and L63 Â 6 mm were analyzed (the spacing and size of the steel angles are shown in Table 4); (3) To study the influence of e, specimens with the eccentric distance of 0, 30, 60, 120, and 180 mm were analyzed; (4) To study the influence of λ, specimens with net lengths of 2000 and 4000 mm were analyzed, respectively. Besides, the material strengths of steel and concrete in the parametric analysis were consistent with the measured strengths shown in Table 2, and the thickness of steel tubes in the parametric analysis were all specified as 5 mm.…”

Section: Ultimate Loadmentioning

confidence: 99%

“…Concrete-filled steel tubes (CFSTs) have been widely used in domestic and foreign constructions due to their excellent compression and seismic properties. [1][2][3][4] The "combined actions" between the steel tube and concrete of CFSTs are fully utilized, hence the local stability of steel tube and the ductility of concrete are effectively improved. Therefore, the effect of "'1 + 1 >2" (the capacity of CFSTs is larger than the sum of the individual capacity of steel tube and concrete) can be achieved in CFSTs.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the effect of "'1 + 1 >2" (the capacity of CFSTs is larger than the sum of the individual capacity of steel tube and concrete) can be achieved in CFSTs. [1][2][3][4] In recent years, to improve the compression and shear properties of the core concrete in CFSTs, some scholars have added different types of steel reinforcing elements (such as the reinforcement cages, profiled steels, steel tubes and lattice steel angles, etc.) into CFSTs, thus the steel-reinforced concrete-filled steel tubes (SRCFSTs) are formed.…”

Section: Introductionmentioning

confidence: 99%

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Eccentric compression behavior of circular concrete‐filled steel tubes reinforced with internal latticed steel angles

Chen,

Hu,

Wang

et al. 2023

Structural Concrete

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The eccentric compression behavior of the CFSTs reinforced with inner latticed steel angles was experimentally investigated, and test results, such as the load–displacement curves, load‐strain curves, distributions of lateral deflection, and ultimate load, were obtained and analyzed. Test results showed the influence of the latticed steel angles on the ultimate load was not obvious when the steel consumption was relatively small, and the lateral deformation was not obvious when the compression load was smaller than 80% of the ultimate load. The corresponding finite element (FE) model was established and validated by the test results, and parametric analysis was also conducted subsequent to validation. The analysis results showed the contribution of latticed steel angles to the ultimate load would be diminished as the eccentric distance increases. Moreover, the design equations for the ultimate load were proposed based on the FE results, and the calculation results indicated the proposed design equations can predict the ultimate load conservatively and safely.

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Section: Ultimate Loadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Eccentric compression behavior of circular concrete‐filled steel tubes reinforced with internal latticed steel angles

Chen,

Hu,

Wang

et al. 2023

Structural Concrete

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“…The mechanical characteristics and stability of the CFST circular arch structure under concentrated load were examined and assessed by Luo et al (2015). Through numerical simulation, Han et al (2020) investigated the bearing behavior of the CFST circular arch's structural performance during an in-plane instability failure. They also looked at the effects of concrete strength, rise-span ratio, and other variables.…”

Section: Introductionmentioning

confidence: 99%

Experimental research and engineering application on bearing capacity of concrete-filled steel tube circular arch

Jun,

Chuangen,

Fuli

et al. 2023

Front. Mater.

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The bearing property and deformation failure law of the CFST circular arch were investigated in order to provide direction for the optimization of the concrete-filled steel tube (CFST) support. The flexural bearing capacity test of the 194 mm × 10 mm CFST was performed initially in this study. It was primarily explored how bearing capacity and deformation of circular arches were affected by the slip of the arch foot and anti-bending strengthening, and the neutral layer migration rule and anti-bending strengthening mechanism of circular arches were examined. The bearing performance of the circular arch under the condition of the concentrated load of the vault and the usual uniform load of the entire span is then simulated in an orthogonal test by numerical simulation in order to extend the experimental investigation. The effect of variables including the steel tube’s outer diameter, thickness, slip of the arch foot, and the ratio of the arch rise to span on the bearing capacity of the circular arch is examined. The study demonstrates that under focused stress on the arch top or full-span normal uniform loading, the arch foot slip is the most important element impacting the CFST support’s bearing capacity. In steel tubes with the same outer diameter and wall thickness, the vector span ratio has a bigger influence than anti-bending strengthening. When the span ratio is the same, the influence of the outer diameter and wall thickness are equal and outweigh the influence of bending strengthening. The circular arch with an outside diameter of 168 mm, a wall thickness of 10 mm, and a rise-span ratio of 0.207 has the best performance characteristics under the influence of concentrated load, and the ultimate failure mechanism is local waist drum deformation failure. Based on the aforementioned study findings, the circular CFST support’s buckling deformation and drum deformation are examined, and a composite support consisting of “anchor net spray + CFST support” is directed for the north three deep track downhill of Yangcheng Coal Mine. Two failure types expose the failure mechanism and provide a technique for optimization. The support had contributed to the circular CFST arc arch’s best bearing performance in the event of waist drum deformation and failure.

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“…e symbiosis of steel tube and core concrete in mechanical properties greatly increases the strength and bearing capacity. e CFST structure has been widely used in the ground building, and a series of research results of CFSTmembers have been obtained [1][2][3][4][5][6][7][8][9][10][11][12]. Based on the mechanical properties of steel-concrete composite materials, underground cast-in-place CFST support is invented as high-strength support, which is suitable for the support of deep roadway and soft rock roadway.…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity of Concrete Filled Steel Tube Circular Arch under the Six‐Point Uniformly Distributed Loading and Its Engineering Application

Liu

Sun

2021

Advances in Materials Science and Engineering

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The influence of rise-span ratio on the bearing performance of concrete filled steel tube (CFST) circular arch was studied in this paper, three groups of CFST circular arch specimens with different rise-span ratios (0.154, 0.207, and 0.26) were selected, the six-point uniformly distributed loading was performed, and bearing performance experiments on CFST circular arch specimens with fixed ends were carried out. In this study, the ultimate bearing capacity and deformation failure characteristics of CFST circular arch specimens were obtained. The comparative analysis shows that the deformation evolution of CFST circular arch specimens has experienced compaction stage, elastic stage, elastic-plastic stage, and plastic stage. In the elastic-plastic and plastic deformation stages, the circular arch shows good ductility and bearing capacity. The bearing capacity of the circular arch is significantly affected by the rise-span ratio. Compared with circular arch specimens with a rise-span ratio of 0.154, the yield load of specimens with a rise-span ratio of 0.207 and 0.26 is increased by 50.8% and 61.5%, and the ultimate bearing capacity is increased by 42.7% and 68.3%, respectively. The larger the rise-span ratio, the greater the yield load and ultimate bearing capacity of the specimen and the stronger the deformation resistance of circular arch. The numerical simulation on the bending resistance process of circular arch was performed by ABAQUS to present the compression failure process of steel tube and core concrete. The simulation results are in good agreement with the experimental results. The experimental and simulation results show that the circular arch first yields at the inner side of the arch foot, and the curvature of different positions of the specimen is no longer consistent. When the ultimate bearing capacity is reached, the steel pipe at the arch foot obviously heaves, and the hooping effect of the steel pipe on the concrete is invalid. Based on the above research results, a closed composite support scheme of “bolt mesh shotcrete + vertical elliptical CFST support + steel fiber concrete shotcrete layer + reinforced anchor cable” was proposed for the extremely soft rock roadway and successfully applied in the Qingshuiying coal mine.

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Numerical modelling of the in-plane behaviour of concrete-filled circular steel tubular arches

Cited by 8 publications

References 45 publications

Eccentric compression behavior of circular concrete‐filled steel tubes reinforced with internal latticed steel angles

Eccentric compression behavior of circular concrete‐filled steel tubes reinforced with internal latticed steel angles

Experimental research and engineering application on bearing capacity of concrete-filled steel tube circular arch

Bearing Capacity of Concrete Filled Steel Tube Circular Arch under the Six‐Point Uniformly Distributed Loading and Its Engineering Application

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