Study on Axial Compression Behavior of Cross-Shaped and L-Shaped Multi-cavity Concrete-Filled Steel Tube Special Shaped Column

Li, Hongbo; Tong, Yang; Yin, Jianguang; Zhang, Hubiao; Yan, Changyu

doi:10.1007/s13296-021-00564-0

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Moreover, the elimination of formwork support during concrete pouring reduces construction time and expenses. These advantages have led to the widespread adoption of steel-concrete structures in civil engineering [ [6] , [7] , [8] , [9] ]. Scholars have also introduced special-shaped columns made of steel tubes filled with concrete, aiming to further enhance the application of CFST columns in building structures.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Yang,

Yu,

Qiu

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Yang,

Yu,

Qiu

et al. 2024

Heliyon

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“…Depending on the type of the inner structure, they can be classified into normal, stiffened, steel linking plates, and binding bars, as shown in Figure 2a–d. Chen and Shen, 8 Lin et al, 9,10 and Du et al 11,12 conducted axial compression tests on short and medium‐height columns of CFLST with stiffeners. The effects of width/thickness ratio and stiffeners on the bearing capacity and ductility of specimens were investigated and a calculation formula was proposed.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of stirrup‐confined concrete‐filled L‐shaped steel tube stub column under axial compression

Wang,

Lyu,

Ding

et al. 2024

Structural Concrete

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In this paper, three concrete‐filled L‐shaped steel tube (CFLST) stub columns subjected to axial compression were tested, with one normal CFLST stub column and two stirrup‐confined specimens. The investigation focused on the effect of the equivalent stirrup ratio on ultimate bearing capacity, axial compression stiffness, ductility factor, and strain ratio of the columns. 3D finite element (FE) models of the specimens were constructed and verified against the tests results and data from literature Parametric analysis was carried out to analyze the influence of different section length–width ratios, steel ratios, material strength grades, and equivalent stirrup ratios on the ultimate bearing capacity. Additionally, the confinement effect of stirrups on the core concrete was analyzed. By generalizing the stress nephogram of the core concrete at the ultimate state and considering the equilibrium of forces, a formula was proposed for calculating the ultimate bearing capacity of the stirrup‐confined CFLST stub column under axial compression using the superposition method. The accuracy of the proposed formula was demonstrated by comparing its results with experimental results, FE model results, and those proposed by other scholars.

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“…Additionally, Cai Jian, Zuo Zhiliang et al [8,9] proposed restraining the out-of-plane deformation of the steel tube by drilling holes in the outer wall of the steel tube and setting binding bars. Additionally, some scholars [10][11][12][13][14][15] have used vertical steel plates, angled steel, or open-hole steel plates to strengthen the bending rigidity of the steel plate section in order to achieve the common working effect of steel tubes and core concrete. Han Linhai [16], Tao Zhong [17], Cheng Rui [18], Tu Yongqing [19,20], and Zheng Yongqian [21] adopted a multi-cell form to eliminate the adverse effects of the concave corners of special-shaped CFST columns.…”

Section: Introductionmentioning

confidence: 99%

Axial Compressive Behavior of Cross-Shaped CFST Stub Columns with Steel Bar Truss Stiffening

Gong

et al. 2023

Materials

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Concrete-filled steel tube (CFST) columns have been widely used in residential buildings due to their high bearing capacity, good ductility, and reliable seismic performance. However, conventional circular, square, or rectangular CFST columns may protrude from the adjacent walls, resulting in inconvenience in terms of the arrangement of furniture in a room. In order to solve the problem, special-shaped CFST columns, such as cross-shaped, L-shaped, and T-shaped columns, have been suggested and adopted in engineering practice. These special-shaped CFST columns have limbs with the same width as the adjacent walls. However, compared with conventional CFST columns, the special-shaped steel tube provides weaker confinement to the infilled concrete under axial compressive load, especially at concave corners. The parting at concave corners is the key factor affecting the bearing capacity and ductility of the members. Therefore, a cross-shaped CFST column with steel bar truss stiffening is suggested. In this paper, 12 cross-shaped CFST stub columns were designed and tested under axial compression loading. The effects of steel bar truss node spacing and column–steel ratio on the failure mode, bearing capacity, and ductility were discussed in detail. The results indicate that the columns with steel bar truss stiffening can change the final deformation mode of the steel plate from single-wave buckling to multiple-wave buckling, and the failure modes of columns also subsequently change from single-section concrete crushing failure to multiple-section concrete crushing failure. The steel bar truss stiffening shows no obvious effect on the axial bearing capacity of the member but significantly improves the ductility. The columns with a steel bar truss node spacing of 140 mm can only increase the bearing capacity by 6.8% while nearly doubling the ductility coefficient from 2.31 to 4.40. The experimental results are compared with those of six design codes worldwide. The results show that the Eurocode 4 (2004) and the Chinese code CECS159-2018 can be safely used to predict the axial bearing capacity of cross-shaped CFST stub columns with steel bar truss stiffening.

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Study on Axial Compression Behavior of Cross-Shaped and L-Shaped Multi-cavity Concrete-Filled Steel Tube Special Shaped Column

Cited by 9 publications

References 24 publications

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Finite element analysis and bearing capacity calculation of cross-shaped CFST columns under compressive load

Experimental and numerical study of stirrup‐confined concrete‐filled L‐shaped steel tube stub column under axial compression

Axial Compressive Behavior of Cross-Shaped CFST Stub Columns with Steel Bar Truss Stiffening

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