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Indexed by:期刊论文

Date of Publication:2011-02-01

Journal:THIN-WALLED STRUCTURES

Included Journals:SCIE、EI

Volume:49

Issue:2

Page Number:379-395

ISSN No.:0263-8231

Key Words:Concrete filled steel tube (CFST); Stub column; Eccentric loading; Partial compression; Hollow section; Bearing capacity; Ductility; Finite element analysis (FEA)

Abstract:This paper investigates the behaviour of concrete filled steel tubular (CFST) stub columns subjected to eccentric partial compression. Twenty-eight specimens were tested and presented. The main parameters in test program include: (1) section type: circular, square and rectangular; (2) load eccentricity ratio (including uniaxial and biaxial loading): from 0 to 0.4; and (3) shape of the loading bearing plate (BP): circular, square, strip and rectangular. The test results indicated that, similar to the corresponding fully loaded CFST stub columns under eccentric loading, CFST stub columns under eccentric partial compression have generally reasonable bearing capacity and favorable ductility. A finite element analysis (FEA) model for CFST stub columns under eccentric partial compression is developed and the predicted performances are validated through measured results. The FEA model is then used to investigate the mechanisms of such composite columns further. (C) 2010 Elsevier Ltd. All rights reserved.