Numerical analysis of novel concrete filled K joints with different brace sections

Zafimandimby, Mampiandra N.H.; Liu, Yongjian; Jiang, Lei; Ma, Yinping

doi:10.1016/j.heliyon.2023.e14847

Cited by 2 publications

(6 citation statements)

References 34 publications

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“…As the present paper is the first to apply a multi-planar dense-crossbeam system in engineering, no available experimental data exist that can validate the numerical simulation method. However, this simulation method is similar to the K-gap-joint simulation carried out by other authors, including RHS joints and RCFST joints involving integral joints [13]. The difference in the results is, on average, less than 20% for the initial stiffness and the ultimate strength (Table 6).…”

Section: Validation Of the Numerical Simulationmentioning

confidence: 53%

“…The dead load is evaluated from the density of the steel and concrete material (for the novel concrete-filled built-up K-joints with different brace sections). For the steel material, it is taken to be 78.5 kN/m 3 , whereas it is 24.5 kN/m 3 for the concrete material [13].…”

Section: Dead Load Evaluationmentioning

confidence: 99%

“…All the thicknesses in the elements are meshed with two layers for a more precise result. Even though these layers have been proven satisfactory for numerical simulation analysis in terms of initial stiffness [1] and ultimate strength [2,13], the present paper carries out result precision analysis through modifying the thicknesses of the layers as two, three, and four layers. Regarding the steel material's properties, elastic and plastic stages are introduced from the initial step, including the density, the elastic modulus, the yield stress, and the tensile strength.…”

Section: Numerical Simulation Modelmentioning

confidence: 99%

“…This geometry raises the possibility of a negative gap in the structure, which increases its strength. More precisely, an analysis carried out by Mampiandra et al [13] indicated that this novel joint type is stronger than a rectangular hollow-section (RHS) joint by 3% to 6% in terms of its initial stiffness and by around 10% in terms of its ultimate strength. Therefore, the novel joint was recommended for use in truss bridges, especially of the Warren type because of its adequacy in the geometry [13].…”

Section: Introductionmentioning

confidence: 99%

“…However, the presence of intermediate crossbeams creates another type of loading, which is mainly divided as the in-plane bending and the out-of-plane bending. To date, the analysis of the novel joint type has focused solely on single joints [13], and no study has been carried out concerning the multi-planar dense-crossbeam deck system. Therefore, the present paper aims to apply the concrete-filled built-up-section K-joints with different brace sections to the Xi'an Weihe bridge, with its symmetric dense-crossbeam system, to check its strength and perform a failure mode analysis.…”

Section: Introductionmentioning

confidence: 99%

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Application of Novel Concrete-Filled Built-Up K-Joints with Different Brace Sections in a Double-Deck Truss Bridge with a Symmetric Deck System with Dense Crossbeams

Zafimandimby,

Liu,

Jiang

et al. 2023

Symmetry

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To facilitate the first application of the novel concrete-filled built-up K-joints with different brace sections in truss bridges, the present paper aims to determine their practicability through a comparison with integral joints. First, a structural analysis was carried out using the MIDAS CIVIL software to evaluate the loading applied to the structure. Additionally, boundary condition analysis was carried out. After that, the symmetric multi-planar joints were developed, using Abaqus 6.14 for the strength verification and the failure mode identification. These were followed by the multi-planar joints estimate cost. The results indicated that for positive bending, the novel joint deformed by 2.01 mm, compared to 4.83 mm for the integral joint in the serviceability limit state. These deformations were equal to 5.58 mm and 7.68 mm, respectively, in the negative bending. Verification under the ultimate limit state indicated a deformation of 10.43 mm for the novel joint type and 16.59 mm for the integral joint in the positive bending, whereas deformations of 15.89 mm and 16.82 mm were indicated in the negative bending. Moreover, a failure mode analysis showed a buckling of the arc yielding for the novel joint type and a buckling of the gusset plate for the integral joint. Finally, the results showed that the novel type of joint was more expensive by about CNY 111,286.06.

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Section: Validation Of the Numerical Simulationmentioning

confidence: 53%

Section: Dead Load Evaluationmentioning

confidence: 99%

Section: Numerical Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Novel Concrete-Filled Built-Up K-Joints with Different Brace Sections in a Double-Deck Truss Bridge with a Symmetric Deck System with Dense Crossbeams

Zafimandimby,

Liu,

Jiang

et al. 2023

Symmetry

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Numerical investigation of ultimate bearing capacity of circular and square concrete-filled double steel tubular T-joints

Naghipour,

Hasani

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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The punching shear problem in composite T-joints with doubler plates has been evaluated in various design codes of practice. However, code provisions do not address the behavior of concrete-filled double steel tubular T-joints filled with concrete, in which concrete contributes to a portion of the shear force to resist punching. The present study presents a finite element modeling analysis to investigate the ultimate load-bearing capacity of circular and square concrete-filled double steel tubular T-joints. A set of 24 double-skin concentric tubular joint specimens were modeled in ABAQUS. A subsequent parametric study was carried out to examine the influence of infill concrete compressive strength, steel tube cross section shape, and section width-to-thickness ratio. Accordingly, stress evolution pattern, buckling mode, stress-strain response, and load–displacement curve of the entire T-joints were investigated. Based on the results obtained, it was revealed that recession in the flange of the primary component, as well as the heaving of the primary component web, are the main reasons for the higher stress levels. It was also seen that when the compressive strength of the infill concrete is 45 MPa, the maximum stress level in circular concrete-filled double steel tubular joint is 2.6 × 102 MPa, while that in the square joint is 2.566 × 102 MPa. The corresponding values for concrete with a compressive strength of 30 MPa are 2.58 × 102 MPa and 0.455 × 102 MPa, respectively. It was also observed that when the width-to-thickness ratio is increased from 20 to 33.33 in circular T-joints, the ultimate load-bearing capacity is reduced by 15%.

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Numerical analysis of novel concrete filled K joints with different brace sections

Cited by 2 publications

References 34 publications

Application of Novel Concrete-Filled Built-Up K-Joints with Different Brace Sections in a Double-Deck Truss Bridge with a Symmetric Deck System with Dense Crossbeams

Application of Novel Concrete-Filled Built-Up K-Joints with Different Brace Sections in a Double-Deck Truss Bridge with a Symmetric Deck System with Dense Crossbeams

Numerical investigation of ultimate bearing capacity of circular and square concrete-filled double steel tubular T-joints

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