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

Yan, Xueyuan; Shu, Shi; Liu, Xuhong; Mao, Huimin

doi:10.3390/buildings13010135

Cited by 4 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[10][11][12]. To promote the application of self-centering structural components in engineering, Yan et al [13] proposed a self-centering joint between CFDST columns and RC beams. Analytical studies have shown that increasing the friction can improve joint energy dissipation, but it will increase the residual deformation of the joint.…”

Section: Introductionmentioning

confidence: 99%

The Seismic Performance of Self-Centering Ribbed Floor Flat-Beam Frame Joints

Chen,

Wang,

et al. 2024

Buildings

View full text Add to dashboard Cite

To achieve rapid post-earthquake repair of self-centering ribbed floor flat-beam frame structures, a ductile hybrid joint consisting of dog-bone-shaped, weakened, energy-dissipating steel bars connected to the upper and lower column sections through high-strength threads is proposed based on the damage control design concept. By moving the ductile energy-dissipating zone out to the locally weakened section of the energy-dissipating steel bars and the locally unbonded prestressed steel bars in the core area, the residual deformation was limited and the seismic performance improved. Based on the working principle of hybrid joints, low cycle loading tests were conducted on two joint specimens to analyze the influence of lateral prestress on the seismic performance of the hybrid joints. Numerical modeling methods were used to compare the position of the energy-dissipating steel bars in the composite layer and the friction performance of the joints. The research results indicated that the hybrid joint had stable load bearing, deformation, and energy dissipation capabilities, with damage being primarily concentrated in the energy-dissipating steel bars. Even at an inter-story displacement angle of 5.5%, the upper and lower column segments remained elastic. After unloading, the connection seam at the joint was closed, and the self-centering performance was good. When the inter-story displacement angle reached 5.5%, the lateral prestress increased from 150 kN to 250 kN, the ultimate bearing capacity of the joint increased by 16.3%, and the cumulative energy consumption increased by 30.0%. The influence of the friction coefficient of the joint surface on the structural performance was set at a threshold of 0.7. When it was less than the threshold, the ultimate bearing capacity and initial stiffness of the joint increased with the increase in the friction coefficient. After reaching the threshold, the increase in the ultimate bearing capacity of the joint slowed down, and the rate of stiffness degradation gradually accelerated. This joint showed excellent seismic performance and can thus achieve post-earthquake repair of structures.

show abstract

Section: Introductionmentioning

confidence: 99%

The Seismic Performance of Self-Centering Ribbed Floor Flat-Beam Frame Joints

Chen,

Wang,

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

Seismic fragility analysis of prefabricated self-centering frame structure

Yan,

Shi,

Wang

et al. 2024

Journal of Constructional Steel Research

View full text Add to dashboard Cite

Mechanism and Design Method of Load Transfer into Concrete-Filled Steel Tubular Arch Ribs through Perfobond-Rib-Shear Connectors

Liu

Jiang

et al. 2023

Buildings

View full text Add to dashboard Cite

In terms of load transfer, the design of the joints in concrete-filled steel tubular (CFST) arch bridges is more critical than that in buildings due to the higher likelihood of steel–concrete-interface debonding. To improve the contact at the steel–concrete interface, a novel arch rib was manufactured by longitudinally welding perfobond-rib-shear connectors to the inner surface of a steel tube and then filling the tube with concrete. In this study, extensive numerical and analytical investigations on the mechanism of introducing loads into CFST arch ribs through perfobond-rib-shear connectors were carried out. A deck CFST arch bridge, namely, the Shuangbao Bridge in China, was selected as a typical application location. The design parameters, including the geometric dimensions of the perfobond-rib-shear connector and the arrangement of the perfobond rib along the cross-section and longitudinal section of the arch rib, were evaluated. The design flow for the joint with perfobond-rib-shear connectors between the vertical columns and the CFST arch ribs was proposed. To improve the load-transfer efficiency, the design scheme of the joint in the Shuangbao Bridge was optimized by replacing the weld studs with perfobond ribs. Significant increases of 1.84–4.02 in the shear resistance were found for the perfobond ribs compared to the welded studs. Additionally, the fabrication of the perfobond ribs was more convenient compared to that of the welded studs.

show abstract

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

Cited by 4 publications

References 28 publications

The Seismic Performance of Self-Centering Ribbed Floor Flat-Beam Frame Joints

The Seismic Performance of Self-Centering Ribbed Floor Flat-Beam Frame Joints

Seismic fragility analysis of prefabricated self-centering frame structure

Mechanism and Design Method of Load Transfer into Concrete-Filled Steel Tubular Arch Ribs through Perfobond-Rib-Shear Connectors

Contact Info

Product

Resources

About