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Indexed by:Journal Papers

Date of Publication:2015-09-01

Journal:THIN-WALLED STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:94

Page Number:394-409

ISSN No.:0263-8231

Key Words:Concrete filled double-skin steel tube (CFDST); Concrete filled steel tube (CFST); Square section; Local bearing force; Bearing capacity

Abstract:Experimental studies on the behaviour of concrete filled double-skin steel tube (CFDST) subjected to local bearing forces are presented in this paper. Sixteen specimens were prepared and tested with the included angle between bearing member (BM) and compression member of 45 degrees and 90 degrees, whilst both the inner and outer steel tubes of the CFDST specimens, are square hollow sections (SHS). The main parameters in the tests were: 1) outside width ratio between BM and compression member: from 0.4 to 0.6; 2) hollow ratio of CFDST: from 0 to 0.6; 3) wall thickness of outer steel tube: 3.05 mm and 3.95 mm; and 4) cross-section of BM: solid and hollow. The failure pattern, load versus deformation curve, bearing capacity and corresponding deformation at bearing capacity of the tested specimens are presented and analyzed. The experimental results show that, while subjected to local bearing forces, CFDST specimens have a high bearing capacity and a good deformation-resistant ability. The calculated bearing capacities of CFDST under local bearing forces using the proposed formulae in the paper are evaluated by comparison with the experimental results. (C) 2015 Elsevier Ltd. All rights reserved.