期刊
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
卷 158, 期 -, 页码 15-27出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jcsr.2019.03.012
关键词
Concrete; Concrete-filled steel tube (CFT); Columns; Confinement; Hoop stress; Strength model
资金
- National Natural Science Foundation of China [51378449, 51778300]
- Natural Science Foundation of Jiangsu Province [BK20151520]
- 333 Project of Jiangsu Province [BRA2016421]
- Qinglan Project of Jiangsu Province [Q12017]
- Project of the Priority Academic Program Development of Jiangsu Higher Education Institutions
In this paper, a large database of 491 test results of circular concrete-filled steel tube (CET) columns under axial compression was collected from the available literature. The collected results were employed to investigate the effects of loading conditions, diameter-to-thickness ratio, concrete type and compressive strength on the load-carrying capacity of CFT columns, from which models for the hoop stress of steel tubes are obtained through nonlinear regression analyses. Based on the von Mises yield criterion together with the proposed hoop stress models, a model for predicting the load-carrying capacity of CFT columns was developed. The performances of the proposed model and the existing models were evaluated using the database. Due to the rationality of the model development process, the proposed model offers a more reasonable and accurate prediction of load-carrying capacity for CFT columns under various loading conditions. (C) 2019 Elsevier Ltd. All rights reserved.
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