期刊
STEEL AND COMPOSITE STRUCTURES
卷 18, 期 2, 页码 519-546出版社
TECHNO-PRESS
DOI: 10.12989/scs.2015.18.2.519
关键词
concrete-filled steel tube columns; axial compression; load capacity; CECS 28:2012
资金
- Hubei Key Laboratory of Roadway Bridge and Structure Engineering (Wuhan University of Technology), China [DQJJ201312]
- Fundamental Research Funds for the Central Universities, China [2014210020201]
This study addresses the load capacity prediction of circular concrete-filled steel tube (CFST) columns under axial compression using current design codes. Design methods given in the Chinese code CECS 28:2012 (2012), American code AISC 360-10 (2010) and EC4 (2004) are presented and described briefly. A wide range of experimental data of 353 CFST columns is used to evaluate the applicability of CECS 28:2012 in calculating the strength of circular CFST columns. AISC 360-10 and EC4 (2004) are also compared with the test results. The comparisons indicate that all three codes give conservative predictions for both short and long CFST columns. The effects of concrete strength, steel strength and diameter-to-thickness ratio on the accuracy of prediction according to CECS 28:2012 are discussed, which indicate a possibility of extending the limitations on the material strengths and diameter-to-thickness ratio to higher values. A revised equation for slenderness reduction factor in CECS 28:2012 is given.
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