Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (3): 114-120.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Experiments and Analyses of a New CFST Connection with Steel Brackets Through Tubular Core

Ji ring  Wu Ai-ming  Wang Yan-jun  Han Xiao-lei   

  1. State Key Laboratory of Subtropic Architecture Science, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-08-30 Revised:2007-12-11 Online:2008-03-25 Published:2008-03-25
  • Contact: 季静（1963-），女，副教授，主要从事高层结构及组合结构抗震性能研究． E-mail:cvjingji@scut．edu．cn。
  • About author:季静（1963-），女，副教授，主要从事高层结构及组合结构抗震性能研究．

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Abstract:

This paper presents a new kind of concrete-filled steel tube （CFST） connection with steel ring and steel brackets through tubular core, which is of the shape similar to the common reinforced concrete beam-column joint and meets the demand of architectural design well. The interior and the side connections are then experimentally investigated. The results prove that the ring steel bar and radial steel bar in slab can well control the crack development of connection, and that the working behavior of the longitudinal bar connected with screwed cannula in the beam under reciprocating load meets the demand of seismic design well. The deformation, strain, crack development, failure mechanism and ultimate bearing capacity of the presented CFST connection are also analyzed in this paper, and a nonlinear FEA simulation is finally carried out, the results further revealing the mechanics of the connection.

Key words: concrete-filled steel tube connection, steel ring, deformation, bearing capacity, finite element analysis