| Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns |
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| 作者姓名： | 程晓东 李广宇 叶贵如 |
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| 作者单位： | Department of Civil Engineering，Zhejiang University，Hangzhou Municipal Infrastructure Development Corporation，Department of Civil Engineering，Zhejiang University Hangzhou 310027，China Hangzhou Municipal Infrastructure Development Corporation，Hangzhou 310006，China，Hangzhou 310006，China，Hangzhou 310027，China |
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| 摘 要： | INTRODUCTION Creep is an internal characteristic of concrete under long-term load. A long time has elapsed since the first discovery of concrete creep in 1907 by Hatt. Many researches have been devoted to this complex problem ever since. However, despite major suc-cesses, the creep phenomenon is still far from being fully understood, even though the phenomenon has occupied some of the best minds in the field, such as Glanville, Dischinger, Troxell, Pickett, Neville, etc. Creep phenome…
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| 关 键 词： | 三维非线性分析 虚拟薄片元素 钢筋混凝土 粘弹性 CFT |
| 收稿时间： | 2004-04-12 |
| 修稿时间： | 2004-07-06 |
Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns |
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| Cheng?Xiao-dong,Li?Guang-yu,Ye?Gui-ru.Three-dimensional nonlinear analysis of creep in concrete filled steel tube columns[J].Journal of Zhejiang University Science,2005,6(8):826-835. |
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| Authors: | Cheng Xiao-dong Li Guang-yu Ye Gui-ru |
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| Institution: | 1.Department of Civil Engineering,Zhejiang University,Hangzhou,China;2.Hangzhou Municipal Infrastructure Development Corporation,Hangzhou,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. |
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| Keywords: | Three-dimensional virtual laminated element (3D-VLE) Creep analysis Three-dimensional viscoelastic theory Three-parameters viscoelastic model Concrete filled steel tube columns |
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