Central angle influence of long-span curve bridge on its inner forces, displacements and stability

Wang Jun-li; He Shuan-hai

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Wang Jun-li, He Shuan-hai. Central angle influence of long-span curve bridge on its inner forces, displacements and stability[J]. Journal of Traffic and Transportation Engineering, 2007, 7(3): 86-90.

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Wang Jun-li, He Shuan-hai. Central angle influence of long-span curve bridge on its inner forces, displacements and stability[J]. Journal of Traffic and Transportation Engineering, 2007, 7(3): 86-90.

Wang Jun-li, He Shuan-hai. Central angle influence of long-span curve bridge on its inner forces, displacements and stability[J]. Journal of Traffic and Transportation Engineering, 2007, 7(3): 86-90.

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Central angle influence of long-span curve bridge on its inner forces, displacements and stability

Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China

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Author Bio:
Wang Jun-li(1964-), male, EngD, professor, +86-29-82334421, junli_wjl@sohu.com
Received Date: 2006-12-16
Publish Date: 2007-06-25

Abstract

Abstract

In order to improve the safety of long-span curve bridge with high piers, the large distortion and material nonlinearity of the bridge were considered, the inner forces and displacements of piers of typical curve rigid frame bridges with different central angles of curve were computed by using finite element method, and the relations of the inner forces, displacements and nonlinear stability load coefficients to the central angle of curve were concluded. Analysis result shows that the end maximum moment of main beam during cantilever construction little decreases with the increase of the angle, but the torsion rapidly increases; the larger the angle is, the larger the transverse-vertical displacements of cantilever end and the transverse displacement at pier top are, the displacements sharply increase, their nonlinear trends are obvious; the nonlinear stability coefficient of bridge is 35% of eigenvalue stability coefficient, the stability load decreases rapidly with the augmenting of the angle; the central angle of curve can not be larger than 38° in order to ensure bridge safety.
- bridge engineering,
- long-span curve bridge,
- central angle,
- inner forces,
- displacement,
- stability,
- cantilever construction,
- nonlinear analysis

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References(16)

References

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