Browse > Article
http://dx.doi.org/10.4334/JKCI.2005.17.6.1025

Long-Term Behavior of Square CFT Columns with Diaphragm  

Kwon Seung-Hee (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Kim Tae-Hwan (Dongbu Corporation)
Kim Yun-Yong (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Kim Jin-keun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Journal of the Korea Concrete Institute / v.17, no.6, 2005 , pp. 1025-1032 More about this Journal
Abstract
This paper presents experimental and analytical studies on long-term behavior of square CFT columns with diaphragm. In order to investigate the effect of the diaphragm on the long~term behavior, experiments for six specimens with two diaphragms and three different column length, and three-dimensional finite element analysis for each specimen have been performed. The finite element models considering the interface behavior between the steel tube and the inner concrete were verified from comparison of the test results with the analysis results. From the test and the analysis results, the following conclusions were obtained. The confinement effect created by the diaphragm does not depends on column length and influences only a part of the whole column that is from the end to the depth which is the same to the width of the column. The shortening of the column with diaphragm which covers more than a half of the cross sectional area of the inner concrete is the same as that of the column under a load applied on the steel tube and the entire section of the inner concrete.
Keywords
CFT column; diaphragm; long-term behavior;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Morino, S. Kswaguchi, J., and Can. Z.S., 'Creep Behaviour of Concrete-Filled Steel Tubular Members', Composite Construction in Steel and Concrete III, Proc. Engineering Foundation Conf, Irsee, Germany, 1996, pp.514 -525
2 Nakai, H., 'An Experimental Study on Creep of Concrete-Filled Steel Tubes', Proc. 3rdint. Conf. on Steel-Concrete Composite Structures, 1991, pp.55-60
3 Bradford, M., 'Service-load deformations of concrete -filled RHS columns', Eighth Int. Symposium on Tubular Structures, Balkema, Singapore, 1998, pp. 425-423
4 권승희, 김진근, '중심축 하중을 받는 CFT 기둥의 장기거동에 관한 연구', 콘크리트학회 논문집, 13권 1호, 2001, pp.77 -85
5 Baltay, P. and Gjelsvik, A, 'Coefficient of friction for steel on concreteat high normal stress', Journal of Materials in Civil Eng., Vol.2, No.2, 1990, pp.46-49   DOI
6 Boverket, Boverket's Hand Book for Concrete Sturctures, BBK 94, Vol. 1, 1994(in Swedish)
7 권승희, 김진근, 'CFT 기둥의 부착응력에 관한 연구', 콘크리트학회 논문집, 13권 2호, 2001, pp.93-98
8 Johansson, M and Gulltoff, K, 'Structural Behavior of Selender Circular Steel-Concrete Composite Columns under Various Means of Load Application', Steel and Composite Structures, Vol.1, No.4, 2001, pp.393-410   DOI   ScienceOn
9 한국강구조학회, '특집기사-CFT 과거.현재.미래', 강구조학회지, 14권 2호, 2002, pp,10-56
10 권승희, 김태환, 이태규, 김윤용 '중심축 하중을 받는 각형 CFT 기둥의 장기거동에 관한 연구', 콘크리트학회논문집, 17권 2호, 2005, pp.281-290
11 Terry, P. J., Bradford, M. A., and Gilbert R. I., 'Creep and Shrinkage in Concrete-Filled Tubes', Tubular Structures VI Proc. 6th Int. Symp. On Tubular Structures, Balkema, Rotterdam, 1994, pp.293-298