Behavior of T-shaped CFST column and U-shaped steel-concrete composite beam joints

Xing Xu, Rui Cheng*, Pu Yang, Kang Chen, Jiang Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

This paper intends to study the seismic and shear behavior of joints for T-shaped concrete-filled steel tubular (CFST) column and U-shaped steel-concrete composite beam (USCB). In the joint details, the C-shaped slots cut in the T-shaped steel tube allowed the double-C channels used to connect the thin-walled U-shaped steel (USS) passing through the panel zone directly. A total of six full-scale specimens constructed according to the concept of strong column-weak beam were tested: two specimens were tested under the monotonic loading to obtain the load-carrying capacity and the other four specimens under cyclic loading to evaluate the seismic performance. The variables included the details of USCB, the axial load level, and the beam-column linear stiffness ratio. Test results demonstrated that the proposed joint details exhibited good seismic and shear performance. Three typical failure modes, i.e. welding fracture between the double-C channels and the steel tube, local buckling of the steel tube, and fracture of the double-C channels were observed. Some indexes of seismic performances, such as load-carrying capacity, deformability, degradation of load-carrying capacity, stiffness degradation, and energy dissipation capacity were evaluated. Finally, the joint shear resistance of the specimens was discussed according to the ASCE design guidelines.

Original languageEnglish
Article number103157
JournalJournal of Building Engineering
Volume43
DOIs
Publication statusPublished - Nov 2021
Externally publishedYes

Keywords

  • CFST column
  • Joint shear resistance
  • Seismic performance
  • Steel-concrete composite beam
  • Steel-concrete composite joint

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