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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 8): 7-    DOI: 10.1631/jzus.2005.A0826
    
Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns
Cheng Xiao-dong, Li Guang-yu, Ye Gui-ru
Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; Hangzhou Municipal Infrastructure Development Corporation, Hangzhou 310006, China
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Abstract  This paper proposes a based on 3D-VLE (three-dimensional nonlinear viscoelastic theory) three-parameters viscoelastic model for studying the time-dependent behaviour of concrete filled steel tube (CFT) columns. The method of 3D-VLE was developed to analyze the effects of concrete creep behavior on CFT structures. After the evaluation of the parameters in the proposed creep model, experimental measurements of two prestressed reinforced concrete beams were used to investigate the creep phenomenon of three CFT columns under long-term axial and eccentric load was investigated. The experimentally obtained time-dependent creep behaviour accorded well with the curves obtained from the proposed method. Many factors (such as ratio of long-term load to strength, slenderness ratio, steel ratio, and eccentricity ratio) were considered to obtain the regularity of influence of concrete creep on CFT structures. The analytical results can be consulted in the engineering practice and design.

Key words： Three-dimensional virtual laminated element (3D-VLE)      Creep analysis      Three-dimensional viscoelastic theory      Three-parameters viscoelastic model      Concrete filled steel tube columns     
Received: 12 April 2004     
CLC:  TU398  
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Cheng Xiao-dong
Li Guang-yu
Ye Gui-ru
Cite this article:

Cheng Xiao-dong, Li Guang-yu, Ye Gui-ru. Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 8): 7-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0826     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 8/7

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