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论文类型：期刊论文
发表时间：2012-01-01
发表刊物：THIN-WALLED STRUCTURES
收录刊物：SCIE、EI
卷号：50
期号：1
页面范围：147-156
ISSN号：0263-8231
关键字：Concrete filled steel tube; Column; Partial compression; Hollow section; Bearing capacity; Finite element analysis (FEA); Mechanism analysis
摘要：This paper studies the behaviour of thin-walled concrete filled steel tube (CFST) column subjected to concentrically partial compression. A series attests was carried out to investigate the effects of sectional type, length-to-diameter (width) ratio, partial compression area ratio and top endplate thickness on the behaviour and bearing capacity of partially loaded CFST column. Twenty-six CFST specimens were tested, and the bearing capacity, load versus deformation relation and failure mode of the specimens were obtained. It was shown that the CFST columns under concentrically partial compression generally had reasonable bearing capacity and ductility. A finite element analysis (FEA) model was developed for simulating the behaviour of CFST column subjected to concentrically partial compression, and a comparison of the performances predicted using this model showed generally good agreement with the test results. The FEA model was then used for the mechanism analysis of CFST column subjected to concentrically partial compression. Finally, a simplified model that could be used to predict the bearing capacity of the composite column under concentrically partial compression was proposed. (C) 2011 Elsevier Ltd. All rights reserved.