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Analytical behaviour of concrete-encased CFST columns under cyclic lateral loading
Qian Wei-Wu 1 #,Li Wei 1,Han Lin-Hai 1 *,Zhao Xiao-Ling 2
1.Department of Civil Engineering, Tsinghua University, Beijing,100084
2.Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia
*Correspondence author
#Submitted by
Subject:
Funding: National Natural Science Foundation of China and the Specialized Research Fund for the Doctoral Program of Higher Education (No.SRFDP))
Opened online:10 April 2015
Accepted by: none
Citation: Qian Wei-Wu,Li Wei,Han Lin-Hai.Analytical behaviour of concrete-encased CFST columns under cyclic lateral loading[OL]. [10 April 2015] http://en.paper.edu.cn/en_releasepaper/content/4637859
 
 
The analytical behaviour of concrete-encased CFST (concrete-filled steel tube) columns under cyclic lateral loading is reported in this paper. A finite element analysis (FEA) model is developed to investigate the cyclic behaviour of such composite column. Comparisons are made between measured and predicted results on failure modes, load versus displacement relationships and ultimate strength. It is found that the proposed FEA model can reproduce the experimental results with a good accuracy. The full-range load-displacement relationships, the contact stress between steel tube and concrete and the axial load distribution among different components are analyzed using the verified FEA model. The cyclic behaviour of concrete-encased CFST is compared with that of conventional CFST and reinforced concrete (RC) columns. The parametric analysis is conducted to investigate influences of various parameters on moment-curvature (M-φ) envelope curves, including the material strength, steel ratio of inner CFST, longitudinal reinforcement ratio, stirrup characteristic value, tube diameter to cross-sectional width ratio (D/B) and axial load level. Finally, a hysteretic model for the M-φ relationship of concrete-encased CFST column is proposed.???
Keywords:Concrete-encased CFST; Concrete; Column; Cyclic loading; Finite element analysis; Parametric study; Hysteretic model;
 
 
 

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