Vol.13 (2010 8 )
A static non-linear analysis method for redundancy evaluation of steel truss bridges
* ** *** ****
Takao Miyoshi, Nobuo Nishimura, Yuichi Tateishi and Satoshi Nara
* ( ) 565-0871 2-1 ** 565-0871 2-1
565-0871 2-1 **** 565-0871 2-1
This paper proposes a static non-linear analysis method for redundancy evaluation of steel truss bridges. Since many main members of the steel truss bridge consist of spatial frames with closed cross-sections, accurate evaluation of the torsional rigidity should be required in the elasto-plastic state. Especially, the implicit stress integration method and the evaluation method of the elasto-plastic stiffness are proposed in this study, in order to improve accuracy and efficiency. Validity and reliability of the proposed method are clarified through some numerical examples. As a result, it is shown that the proposed method has higher accuracy and more excellent efficiency than conventional ones. Finally, a numerical example for redundancy of a truss bridge is demonstrated. Key Words : steel truss bridge, thin-walled closed cross-section, implicit stress
integration, redundancy
1
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応用力学論文集 Vol.13, pp.965-976 (2010 年 8 月) 土木学会
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- 970 -
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- 973 -
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(1)
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CPU
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1)
pp.1-4 2009. 2)
A Vol.65No.2 pp.410-425 2009.
3)
64I-113 pp.225-226 2009.
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-45 JSCE pp.1-13 1998. 7)
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14)
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15) III 2002
2010 3 9
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