Mechanical performance of stirrup-confined concrete-filled steel tubular stub columns under axial loading

Ding, Fa‐xing; Fang, Chang-jing; Bai, Yu; Gong, Yumei

doi:10.1016/j.jcsr.2014.03.005

Cited by 100 publications

(41 citation statements)

References 13 publications

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“…K is the confinement coefficient. K¼1.7 for circular CFT columns [5] and K¼1.2 for square CFT columns [9]. And the load bearing capacity of CFT stub columns subjected to local compression N b was recommended to be…”

Section: Parametric Studymentioning

confidence: 99%

“…The experimental results were compared with the predicted results using different methods: FE model, Eqs. (8) and (9). And the ratios of the experimental result over the predicted value by using each individual method are presented in Table 5.…”

Section: Formula Validationmentioning

confidence: 99%

“…(8), and the average N b,e / N b ratio was 1.059 with a coefficient of variation of 0.255 for Eq. (9). Therefore, in general, in predicting of the load bearing capacity of circular CFT stub columns, Eq.…”

Section: Formula Validationmentioning

confidence: 99%

“…They have much more advantages compared with the ordinary steel or concrete system including higher strength and stiffness, higher ductility, and larger energy absorption capacity [1]. With the benefits of CFT, the use of CFT columns is becoming more popular and the performance of concrete filled steel tubes has caught more and more research attentions [1][2][3][4][5][6][7][8][9]. In most cases, such as the pier of bridges and arch structures, CFT columns are subjected to axially compression loads.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical behavior of circular and square concrete filled steel tube stub columns under local compression

Ding

Liu

et al. 2015

Thin-Walled Structures

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a b s t r a c tThis paper presents a combined experimental and numerical study on the behavior of both circular and square concrete-filled steel tube (CFT) stub columns under local compression. Twelve circular and eight square CFT stub columns were tested to study their bearing capacity and the key influential parameters. A 3D finite element model was established for simulation and parametric study to investigate the structural behavior of the stub columns. The numerical results agreed well with the experimental results. In addition, analytical formulas were proposed to calculate the load bearing capacity of CFT stub columns under local compression.

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Section: Parametric Studymentioning

confidence: 99%

Section: Formula Validationmentioning

confidence: 99%

Section: Formula Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical behavior of circular and square concrete filled steel tube stub columns under local compression

Ding

Liu

et al. 2015

Thin-Walled Structures

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“…There are two main traditional modeling methods in a finite element simulation program. The first one is the “shell‐solid” refined finite element modeling method (Figure ), where the concrete material in structural components is described with solid three‐dimensional elements, while steel is modeled with embedded steel truss or beam elements to represent reinforcing bars, or shell elements to simulation steel plates. These detailed finite element models can also capture the bond contact and slip between the steel bars and concrete materials, and can provide detailed responses of structural components.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of steel–concrete composite structures

Zhang

Kolozvari

2018

Structural Concrete

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Steel–concrete composite structures are diverse in form and are widely used in industrial and civil infrastructures. To effectively simulate nonlinear behavior of composite structures under vertical load and horizontal earthquake action, a group of material constitutive models suitable for concrete in composite structures, concrete‐filled steel tubes that consider restraining effect, steel bars, and steel plates are developed via the User subroutine to define a material's mechanical behavior (UMAT) of a large‐scale finite element program ABAQUS based on extensive research. Based on analytical results, a section analysis method is proposed for round‐end sections, which is integrated into a fiber beam‐column model of steel–concrete composite structures in combination with the existing fiber discretization program. To verify the accuracy and applicability of the proposed fiber beam‐column model, trial computation is performed with the present fiber model versus PQ‐fiber model and OpenSees fiber beam‐column element. Comparison with extensive tests shows that the present fiber model has good accuracy and applicability.

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10.28: Fire performance of concrete filled steel tubular columns with built‐in stirrups

Zang

Zhang³

2017

ce papers

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Two concrete filled steel tubular columns with built-in stirrups (i.e., Specimens 1 and 2) and one control column (i.e., concrete filled steel tubular column without built-in stirrups, Specimen 3) were exposed to the ISO834 standard fire, and fire behaviors of the three columns were investigated and compared with each other. The steel usage of Specimen 1 (2) (i.e., total weight of the steel tube and stirrups) was the same as that of Specimen 3 (i.e., weight of the steel tube). The distance between the stirrup's centerline and inner surface of the steel tube was 20mm for Specimen 1, and 50mm for Specimen 2. The height and outer diameter of all the three columns were, respectively, 3800mm and 320mm. The axial load applied to Specimens 1 and 2 was identical with that applied to Specimen 3. Test results show that when the steel usage keeps unchanged, the fire endurance of the concrete filled steel tubular column with built-in stirrups is much longer than that of the column without built-in stirrups. Finally, a finite element analysis (FEA) model was developed and verified against the experimental results, and a parametric study has been preliminarily performed to reveal the fire performance of the concrete filled steel tubular columns with built-in stirrups.Keywords: concrete filled steel tube, fire performance, built-in stirrup 2 EXPERIMENTAL PROGRAM Specimen preparation and material propertiesSchematic diagrams of two CFST columns with built-in stirrups (Specimen 1 and Specimen 2) and one conventional CFST column (Specimen 3, control specimen) are shown in Fig. 1. All the three

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Mechanical performance of stirrup-confined concrete-filled steel tubular stub columns under axial loading

Cited by 100 publications

References 13 publications

Mechanical behavior of circular and square concrete filled steel tube stub columns under local compression

Mechanical behavior of circular and square concrete filled steel tube stub columns under local compression

Numerical modeling of steel–concrete composite structures

10.28: Fire performance of concrete filled steel tubular columns with built‐in stirrups

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