Experimental and analytical investigation of the behavior of diaphragm-through joints of concrete-filled tubular columns

Rong Bin, Chen Zhihua, Zhang Ruoyu, Apostolos Fafitis, Yang Nan

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Static tensile loading experiments and nonlinear finite element analysis were carried out to study the mechanical properties and failure modes of diaphragm-through joints of concrete-filled square steel tubular columns. Comparison between experimental data and finite element analysis revealed that the FE predictions of failure modes, load-displacement curves and bearing capacity agree with the test results. It was found that the tensile load from the steel beam flange is mainly shared by the square steel tube and the diaphragm. The plastic zone of the tube appears around the intersections of the tube and the diaphragm whereas the diaphragm plastic zone appears along the cross-section lines enclosed by the steel square tube. Calculation models of yield lines on square steel tube and diaphragm are established based on distribution pattern of plastic zone, and an analytical method for the design of such joints is proposed as well. The experimentally obtained bearing capacities of the tested specimens are in good agreement with the analytically computed capacities.

Original languageEnglish (US)
Pages (from-to)909-929
Number of pages21
JournalJournal of Mechanics of Materials and Structures
Volume7
Issue number10
DOIs
StatePublished - Dec 2012

Keywords

  • Analytical method
  • Concrete-filled square steel tubular column
  • Diaphragm-through joint
  • Finite element analysis
  • Static tensile loading experiment

ASJC Scopus subject areas

  • Mechanics of Materials
  • Applied Mathematics

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