| Numerical analysis of ultimate strength of concrete filled steel tubular arch bridges |
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| 作者姓名： | 谢旭 陈衡治 李辉 宋世锐 |
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| 作者单位： | [1]Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China [2]Department of Civil Engineering, Ningbo University, Ningbo 315211, China [3]Centre for Civil ＆ Construction Engineering, University of Manchester, Manchester, M601QD, United Kingdom |
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| 摘 要： | INTRODUCTION As a result of the combined effects of the rolled steel tube and the core concrete, Concrete Filled Steel Tubular (CFST) structures can effectively take ad-vantage of these two materials to improve the com-pressive strength and the ductility of the structures. This kind of structure is developing quickly in China and widely used in high-rise structures and bridges. Recently, due to the development of construction projects, numerous studies on CFST structures have been i…
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| 关 键 词： | 拱桥 钢筋混凝土 CFST 疲劳压力 应力分析 |
| 收稿时间： | 2004-07-30 |
| 修稿时间： | 2004-12-01 |
Numerical analysis of ultimate strength of concrete filled steel tubular arch bridges |
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| Xie?Xu,Chen?Heng-zhi,Li?Hui,Song?Shi-rui.Numerical analysis of ultimate strength of concrete filled steel tubular arch bridges[J].Journal of Zhejiang University Science,2005,6(8):859-868. |
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| Authors: | Xie Xu Chen Heng-zhi Li Hui Song Shi-rui |
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| Institution: | 1.Department of Civil Engineering,Zhejiang University,Hangzhou,China;2.Department of Civil Engineering,Ningbo University,Ningbo,China;3.Centre for Civil & Construction Engineering,University of Manchester,Manchester,UK |
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| Abstract: | The calculation of ultimate bearing capacity is a significant issue in the design of Concrete Filled Steel Tubular (CFST)arch bridges. Based on the space beam theory, this paper provides a calculation method for determining the ultimate strength of CFST structures. The accuracy of this method and the applicability of the stress-strain relationships were validated by comparing different existing confined concrete uniaxial constitutive relationships and experimental results. Comparison of these results indicated that this method using the confined concrete uniaxial stress-strain relationships can be used to calculate the ultimate strength and CFST behavior with satisfactory accuracy. The calculation results are stable and seldom affected by concrete constitutive relationships. The method is therefore valuable in the practice of engineering design. Finally, the ultimate strength of an arch bridge with span of 330 m was investigated by the proposed method and the nonlinear behavior was discussed. |
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| Keywords: | Concrete Filled Steel Tubular (CFST) Confined concrete Stress-strain relationship Ultimate strength |
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