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论文类型：期刊论文
发表时间：2012-04-01
发表刊物：JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
收录刊物：SCIE、EI
卷号：71
页面范围：63-73
ISSN号：0143-974X
关键字：Concrete filled double-skin steel tube (CFDST); Concrete filled steel tube (CFST); Double-skin; Partial compression; Composite column; Hollow section; Bearing capacity
摘要：The experimental behaviour of concrete filled double-skin steel tube (CFDST) sections subjected to partial compression is reported in this paper. Fourteen specimens with outer and inner steel tubes of circular hollow section (CHS) and fifteen specimens with outer and inner steel tubes of square hollow section (SHS) were tested. The test parameters included: 1) hollow ratio, 2) top endplate thickness, and 3) partial compression area ratio. The test results indicated that the CFDST columns under partial compression behaved in a ductile manner. The partial compressive behaviour and the failure modes of partially loaded CFDST stub columns were significantly affected by the parameters investigated. Finally, a simplified model for predicting the bearing capacity of partially loaded CFDST sections is proposed. (C) 2011 Elsevier Ltd. All rights reserved.