Structural Analysis of Concrete-Filled Double Steel Tubes

Zhang, Yufen; Guo, Degang

doi:10.1007/978-981-15-8089-5

Cited by 3 publications

(2 citation statements)

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“…Compared with the concrete-filled steel tubular (CFT) structure, it has advantages of lighter self-weight, higher flexural rigidity, and better fire resistance [1,2]. Nowadays, joints composed of CFDST columns and frame beams have been widely studied and applied [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Mechanical Behavior of Self-Centering Joint between CFDST Column and RC Beam

et al. 2023

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The existing connection between the concrete-filled double steel tubular (CFDST) column and the reinforced concrete (RC) beam is difficult to repair and reuse after damage. In this paper, a self-centering joint between the CFDST column and the RC beam is proposed. The self-centering of the joint is realized by prestressed steel strands, and the energy dissipation is realized by friction. The overall purpose of the research is to analyze the influence of steel strand and friction on the mechanical behavior of the joint. By comparing the envelope curve and the restoring force model of a numerical joint model with theoretical values, accuracy of the numerical model was verified. Then, joints with different parameters, including the friction, prestress of steel strands, and ratio of the resisting moment provided by steel strands to the resisting moment provided by friction in the opening moment of joints, were numerically analyzed. The results showed that the joints with greater friction and prestress of steel strands had higher bearing capacity. Increasing the friction could increase the energy dissipation capacity of the joint, but it would increase the residual deformation of the joint. To reduce residual deformation, the prestress of steel strands should be increased. When the resultant force of the pretension of steel strands was greater than friction, the steel head could be kept pressed on the connecting block, making the stress changes of steel strands and the self-centering performance of the joint stable.

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Section: Introductionmentioning

confidence: 99%

“…The mechanical behavior of joints between CFDST columns and RC beams under different loading conditions has been experimentally and theoretically studied by scholars, such as Zhang et al [3,5]. In addition, the mechanical behavior and failure modes of joints between CFDST columns and steel beams have been studied [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Mechanical Behavior of Self-Centering Joint between CFDST Column and RC Beam

et al. 2023

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Further analysis on mechanical behaviors of blind-bolted T-stub connections to CFDST columns

Zhang

Demoha

2023

Structures

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Seismic Response of Prestressed Self-Centering Moment-Resisting Frames

Yan,

Shi,

Mao

et al. 2024

Buildings

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This paper aims to examine the seismic response of prestressed self-centering moment-resisting frames (PSC-MRFs) based on concrete-filled double steel tubular (CFDST) columns and RC beams. The beam of this novel connection is divided into two parts, connected by bolts and tendons, and the beam includes a gap opening feature, which could be regarded as a normal single beam in the field. Cyclic loading analysis was performed on one-story frames with different initial parameters arranged in adjacent bays. Nonlinear dynamic analysis was conducted on a six-story frame under two seismic hazard levels. The cyclic loading analysis showed favorable self-centering performance of the frame even when the hysteretic energy dissipation ratio reached 0.808. Seismic analysis results showed that compared with the in situ reinforced concrete frame, PSC-MRFs generally had similar maximum inter-story drifts under fortification earthquakes, but the residual inter-story drifts were reduced by 33%; under rare earthquakes, the maximum inter-story drifts and residual inter-story drifts of PSC-MRFs were reduced by 22% and more than 90%, respectively. In the adjacent bays on the same story of PSC-MRFs, connections with smaller imminent moments of gap opening opened earlier under earthquake, and the maximum opening angle was larger. The general seismic performance and self-centering of PSC-MRFs was significantly more advantageous than that of in situ reinforced concrete frames.

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Structural Analysis of Concrete-Filled Double Steel Tubes

Cited by 3 publications

References 0 publications

Numerical Analysis of Mechanical Behavior of Self-Centering Joint between CFDST Column and RC Beam

Numerical Analysis of Mechanical Behavior of Self-Centering Joint between CFDST Column and RC Beam

Further analysis on mechanical behaviors of blind-bolted T-stub connections to CFDST columns

Seismic Response of Prestressed Self-Centering Moment-Resisting Frames

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