Seismic behavior of a new through-core connection between concrete-filled steel tubular column and composite beam

Zhou, Qishi; Fu, Huawei; Ding, Fa‐xing; Liu, Xuemei; Yu, Yujie; Wang, Liping; Yu, Zhenkun; Luo, Linjie

doi:10.1016/j.jcsr.2018.12.002

Cited by 16 publications

(9 citation statements)

References 14 publications

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“…With the nonlinear fitting approach, the confinement coefficient (k) can be expressed as follows. = 0.59 exp (− 0.44 ) + 0.42 (5) where is confinement coefficient and is the eccentric ratio of CFSST columns. Based on the stress-strain model proposed by Tao et al [24], a new three-stage constitutive model which considered the influence of eccentric loading was proposed.…”

Section: Fea Modelingmentioning

confidence: 99%

“…Numerous tests have illustrated that CFST columns have both higher strength and ductility under compressive loading when compared with traditional steel reinforced concrete columns [1]. In current international practices, CFST columns have been widely applied as vertical loadbearing components in high-rise structures, bridges, and ocean infrastructures [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Concrete‐Filled Square Steel Tube Short Columns under Eccentric Loading

Shan

Cai

et al. 2019

Mathematical Problems in Engineering

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The concrete-filled square steel tube (CFSST) columns have been widely applied in structural engineering. Although many constitutive models have been proposed to describe CFSST short columns under concentric loading, the applicability of the existing concentric model in the analysis of CFSST short columns under eccentric loading has not been properly verified. In this paper, the eccentric behaviors of CFSST short columns were investigated with the software of ABAQUS/standard. It was found that the contact stress between steel tube and inner concrete was seriously affected by eccentric ratios, indicating that the confinement effect of steel tube on inner concrete was different under concentric and eccentric loading. In this paper, a new stress-strain model of inner concrete which considered the influence of eccentricity was developed and verified with existing experimental results. It was found that the proposed stress-strain model was more accurate in simulating the eccentric behaviors of CFSST short columns.

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Section: Fea Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Concrete‐Filled Square Steel Tube Short Columns under Eccentric Loading

Shan

Cai

et al. 2019

Mathematical Problems in Engineering

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“…e RC slab was bonded to the steel girder using shear studs. en, in the FE model, the Timoshenko beam elements B31 were used to simulate the shear studs, and the interaction between the shear stud and the steel beam was simplified with the nonlinear spring elements * SPRING2 [12]. en, during the model establishment process, the Beam-31 shear stud elements were positioned at the location of the shear studs and embedded into the concrete slab.…”

Section: Element Typesmentioning

confidence: 99%

“…When the girder dimension is close to the column diameter, the flange part inside the tube may interfere with the concrete filling in the CFST column and thus weaken the load bearing and bending performance of the CFST column. To address this problem, Zhou et al [12] proposed a modified through-core detail in which the flange width of the through girder within the column region was reduced to provide space for the concrete to pass as shown in Figure 1. However, in this way, the load transferring ability of the steel girder was reduced.…”

Section: Introductionmentioning

confidence: 99%

“…Several exploratory seismic tests have been performed on these modified through-core connections, and the results have indicated that the modified connection configuration can maintain good seismic performance if the flange width reduction is controlled within a reasonable range [12]. However, quasi-static tests cannot effectively reflect the load bearing mechanism, and the design guidance of the modified through-core connection still requires more in-depth investigation.…”

Section: Introductionmentioning

confidence: 99%

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Static Behavior of a Modified Through‐Core Connection between CFST Column and Composite Beam

Zhou

et al. 2019

Advances in Civil Engineering

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Through-core connection has been proven to be an ideal solution to ensure a rigid connection between steel beams and CFST columns. However, the traditional through-core connection sometimes encounters concrete filling problems. A modified through-core connection design with details of reduced flange width was therefore proposed. Through-core reinforcements were added as supplements for tension load transfer. The monotonic loading tests and comprehensive FE simulations were performed to investigate the load bearing performance and working mechanism of this modified connection. The results indicated that the modified through-core connection presented plasticity hinge failure at the beam end and crack formulation and progradation at the RC slab. The reduced flange width reduced the strength of the connection, but the reduction extent was limited. Due to the through-core construction, the majority of internal forces at the beam were directly transferred into the column. The through-core reinforcement can effectively participate in load bearing after the connection yields. The flange width reduction extent and the length of the reduction region must be controlled to ensure sufficient connection strength. The number of shear studs and TC reinforcements can influence the load bearing ability, and design suggestions are provided for the modified through-core connection.

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Study on cyclic behavior of concrete column steel beam connections

Paudel,

Arunkumar,

Rajkumar

2024

Innov. Infrastruct. Solut.

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Seismic behavior of a new through-core connection between concrete-filled steel tubular column and composite beam

Cited by 16 publications

References 14 publications

Analysis of Concrete‐Filled Square Steel Tube Short Columns under Eccentric Loading

Analysis of Concrete‐Filled Square Steel Tube Short Columns under Eccentric Loading

Static Behavior of a Modified Through‐Core Connection between CFST Column and Composite Beam

Study on cyclic behavior of concrete column steel beam connections

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