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Bio-Design and Manufacturing  2020 Vol.3 No.2 P.166~173

10.1631/jzus.2002.0166


Optimum design of large span concrete filled steel tubular arch bridge based on static, stability and modal analysis


Author(s):  ZHAO Chang-jun, HU Jun, XU Xing

Affiliation(s):  Communication Science & Technology Institute, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zcjygy@163.net

Key Words:  Concrete filled steel tubular arch bridge, Finite element model, Stability, Modal analysis, Geometric nonlinearity, Prestress effect


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ZHAO Chang-jun, HU Jun, XU Xing. Optimum design of large span concrete filled steel tubular arch bridge based on static, stability and modal analysis[J]. Journal of Zhejiang University Science D, 2020, 3(2): 166~173.

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DOI - 10.1631/jzus.2002.0166


Abstract: 
A three-dimensional finite element model was established for a large span concrete filled steel tubular (CFST) arch bridge which is currently under construction. The arch rib, the spandrel columns, the prestressed concrete box-beam, the cast-in-situ concrete plate of bridge deck, the steel box-beam and the crossbeams connecting the two pieces of arch ribs, were modeled by three-dimensional Timoshenko beam elements (3DTBE). The suspenders were modeled by three-dimensional cable elements (3DCE). Both geometric nonlinearity and prestress effect could be included in each kind of element. At the same time a second finite element model with the same geometric and material properties excepted for the sectional dimension of arch rib was set up. Static dynamic analyses were performed to determine the corresponding characteristics of the structure. The results showed that the arch rib's axial rigidity could be determined by static analysis. The stability and vibration of this system could be separated into in-plane modes, out-of-plane modes and coupled modes. The in-plane stability and dynamic characteristics are determined by the arch rib's vertical stiffness and that of out-of-plane is determined by the crossbeams' stiffness and arch rib's lateral stiffness mainly. The in-plane stiffness is much greater than that of out-of-plane for this kind of bridge . The effect of geometric nonlinearity and prestress effect on bridge behavior is insignificant.

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Reference

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[6] Jiang Jiafen, Tang Guanzuo, 1998. Three-Direction Stress Concrete. The Railway Press of China, Beijing. p.52-75

[7] Li Guohao, 1985. Stability and Dynamic Analyses of Bridges. The Railway Press of China, Beijing, p.1-5

[8] Xiang Haifan, Liu Guangdong, 1991. Stability and Dynamic Analyses of Arch Structures. The People's Communication Press, Beijing, p.1-4

[9] Xu Xing, Guo Yimu, Shen Yongxing, 1993. Nonlinear Finite Element Method and Program Design. Zhejiang University Press. Hangzhou, p.30-54

[10] Yin Youquan, 1987. Nonlinear Element Method in Solid Mechenics. Beijing University Press, Beijing, p.160-172

[11] Wang Xucheng, Shaomin, 1997. Finite Element's Principle and Numerical Method. Tsinghua University Press, Beijing, p.531-553

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Mithun<mithun431@yahoo.com>

2010-11-11 14:17:19

this article is good.

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