Flexural response of concrete-filled seamless steel tubes

Abed, Farid; Abdelmageed, Yosri; Ilgün, Abdulkerim

doi:10.1016/j.jcsr.2018.06.030

Cited by 33 publications

(4 citation statements)

References 12 publications

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“…In addition, Ren et al [ 23 ] reported that PSDM was conservative for CFST beams with elliptical cross-sections. A series of studies showed that the predicted results from the simplified formulations in line with the Unified Theory were in close agreement with test results of circular CFST beams, but the Unified Theory-based formulations produced unconservative errors for square and rectangular CFST beams with low concrete-to-steel rations in a few cases [ 24 , 25 , 26 , 27 , 28 ]. With respect to composite CFST beams, Moon et al [ 10 ] reported PSDM gave a reasonably conservative prediction for the bending resistance of a T-shaped composite CFST girder composed of CFST circular beams and concrete slabs under both positive and negative bending moments, based on experimental and numerical studies.…”

Section: Introductionmentioning

confidence: 84%

Flexural Strength Evaluation of Multi-Cell Composite T-Shaped Concrete-Filled Steel Tubular Beams

Shen

2021

Materials

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The multi-cell composite T-shaped concrete-filled steel tubular (MT-CFST) element is an innovative structural form. It has great potential for construction applications because of favorable advantages over traditional composite elements. The flexural strength of MT-CFST beams was investigated in this study to provide recommendations in line with existing design codes. First, formulations to evaluate the flexural strength of MT-CFST beams were derived based on the Unified Theory and plastic stress distribution method (PSDM). For the Unified Theory-based formula, a modified confinement effect factor that considers the shape of a cross-section was proposed. An experimental study on the flexural behavior of six MT-CFST beams as well as two hollow section counterparts was conducted. The influence of bending moment direction, concrete infill, wall thickness, and cross-section sizes were investigated. The accuracy of the proposed formulations was verified against the test results and numerical results from finite element modeling. The comparisons showed that the formula in line with the Unified Theory provided more accurate predictions with reasonable conservatism for the studied MT-CFST beams.

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Section: Introductionmentioning

confidence: 84%

Flexural Strength Evaluation of Multi-Cell Composite T-Shaped Concrete-Filled Steel Tubular Beams

Shen

2021

Materials

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“…To ascertain the relationships between M 0 and ξ , V f , the experimental results from Refs. 29, 59, 60 are conducted into a regression analysis as shown in Figure 17e,f. The relationships can be taken as:

M_{0} = γ_{normalm} W_{sc} f_{sc}^{normaly} \cdot f (V_{f})

γ_{normalm} = 1.156 + 0.232 \ln (ξ - 0.253)

f (V_{f}) = 1.000 + 0.087 V_{normalf} - 0.040 {V_{f}}^{2}

The predicted M 0,pre are listed in Table 7 and compared with the tested results M 0,exp .…”

Section: Prediction Of Eccentric Bearing Capacitymentioning

confidence: 99%

Eccentric loading behavior of steel tube columns filled with steel‐fiber‐reinforced recycled concrete

Liu

Huang

et al. 2022

Structural Concrete

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A comprehensive study focuses on the eccentric compressive behavior of steel‐fiber‐reinforced recycled concrete filled steel tube (SRCFST) columns. A total 39 stub columns are tested, and the variables include eccentricity ratio (e/r), steel fiber volume, quality replacement rate of recycled aggregate, concrete strength grade, and diameter–thickness ratio of steel tube. Failure mode, the load–lateral deflection behavior and the moment–curvature response are analyzed. The load–moment interaction relationships, the load–strain responds and the neutral axis position are researched. The results show that the use of recycled aggregate causes the little‐to‐no influence on the eccentric loaded performance of SRCFST columns with a relative smaller e/r. However, the ultimate load and deformability of the columns with higher e/r both decreases rapidly. Adding steel fibers can offset this adverse effect. The addition of steel fibers sustains a higher relative compression region height in the cross section. The ultimate load descent of SRCFST columns due to the increase of e/r is slower than ordinary concrete filled steel tube and recycled aggregate concrete filled steel tube columns. Moreover, on the basis of the unified theory, a calculation model is proposed to predict the ultimate capacity of SRCFST columns under combined loadings. The model captures well the compressive response of SRCFST columns.

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“…Extensive research investigations on CFST columns for on-site construction were conducted experimentally and numerically under different loading conditions, such as compression [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], bending [18][19][20][21][22][23][24][25][26][27] and tensions [28][29][30][31][32]. In the conventional construction of CFST columns, welded connections are widely used to connect one steel tube to another steel tube of CFST columns, which is assumed to behave similarly to continuous CFST columns without connections.…”

Section: Introductionmentioning

confidence: 99%

Behaviour and Design of Innovative Connections of Prefabricated CFST Columns under Tension

2023

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This paper investigates the tensile behaviour of prefabricated concrete-filled steel tube (PCFST) columns with bolted connections. Innovative bolted column-column (BCC) connections are developed using standard structural bolts to simplify the construction process for the connection of two PCFST columns, especially for the corner, edge, and interior columns. The behaviour of BCC connections in PCFST columns under tension has been investigated, adopting the finite element (FE) modelling approach. Parametric studies are carried out to understand the influence of bolt arrangements (TB = 4, 6, 7, 8), base plate thickness (tbp = 8, 10, 14, and 18 mm), bolt diameters (db = 16, 18, 20, 24 mm), vertical stiffeners (ths = 4, 6, 8, 10 mm), horizontal stiffeners (ths = 10, 12, 13, 15 mm), and yield strength of steel tube (fy,t = 380, 450, and 550 MPa) on the behaviour of PCFST columns with developed BCC connections. The results show that the PCFST columns with the developed BCC connections can attain sufficient tensile strength and satisfy the tensile strength requirements recommended in AS5100 and the robustness requirements in AS1170. The outcome of this paper will be useful to practising structural engineers to design prefabricated CFST columns with BCC connections under tension.

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Flexural response of concrete-filled seamless steel tubes

Cited by 33 publications

References 12 publications

Flexural Strength Evaluation of Multi-Cell Composite T-Shaped Concrete-Filled Steel Tubular Beams

Flexural Strength Evaluation of Multi-Cell Composite T-Shaped Concrete-Filled Steel Tubular Beams

Eccentric loading behavior of steel tube columns filled with steel‐fiber‐reinforced recycled concrete

Behaviour and Design of Innovative Connections of Prefabricated CFST Columns under Tension

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