Numerical analysis and punching shear fracture based design of longitudinal plate to concrete-filled CHS connections

Fei Xu, Ju Chen, Tak Ming Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

A total of 336 connections with a wide range of parameters on geometrical configurations, material properties and load positions was conducted to investigate (a) the general applicability of the experimental conclusion for the governing limit state, (b) the shear stress profile on the failure face and (c) the design equations based on fracture analytical models under various loading conditions. FEA extended the validity of experimental conclusion that the only governing limit state was punching shear failure instead of the deformation limit of 3% chord diameter (D). With an aim of proposing design equations based on ductile fracture mechanics, the stress distributions on the fracture failure face and the inner concrete were investigated by the parametric study, and then were adopted in the analytical models. Finally, design equations based on semi-theoretical models for the ultimate strength of longitudinal plate-to-concrete-filled CHS connections under three investigated loads were proposed. It is found the connection-capacity predictions agreed with both test and FEA results well.
Original languageEnglish
Pages (from-to)91-106
Number of pages16
JournalConstruction and Building Materials
Volume156
DOIs
Publication statusPublished - 15 Dec 2017

Keywords

  • Concrete-filled steel tubes
  • Design
  • Ductile fracture
  • Finite element analysis
  • Longitudinal plate connections
  • Punching shear

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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