An Investigation into the Earthquake Reaponses of Special-Shaped Arch Bridges

Abstract:

By building a finite element model of a special-shaped arch bridge, this paper discusses the effects of the changes of the geometric shape, and the skewed angle of the girder and arch on the dynamic characteristics. In addition, this paper analyzes the longitudinal earthquake responses using the response spectrum method. The results show that when longitudinal earthquakes occur, all geometric shapes, and skewed angles of the girder and arch exhibit different levels of effect on the horizontal and vertical deformations of the girder and the arch, the internal forces of the arch, the girder, and the cables. Among all these parts of the bridge, the arch is affected most by the aforementioned factors. Moreover, because of the unique geometric shape of the special-shaped arch bridge, the distributions of initial and completed cable forces are complex. Therefore, obtaining regular stress responses from the special-shaped arch bridge is difficult regardless of whether the bridge is in-plane or out-of-plane. Hence, the arrangement of cable forces should be specifically considered when building an analytic model of a special-shaped arch bridge.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 328-331
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.328
• Online since: October 2011
• Authors: Chang Huan Kou, Ming Chang Yang, Shih Wei Ma, Tsung Ta Wu
• Keywords: Cable Force, Earthquake Response, Special-Shaped Arch Bridge

References

[1] K.H. Li: Stability and Vibration of the Bridge Structure, China Railway Publishing House, Beijing (2003), in Chinese.

[2] Y.F. Song: Dynamics of Road and Bridges, People's Communications Press, Beijing (2000), in Chinese.

[3] T.M. Zhang, C.B. Du and X.D. Zhou: Dynamics of Structures, Tsinghua University Press, Beijing (2008), in Chinese.

[4] R. W. Clough and J. Penzien: Dynamics of Structures, Mc-Graw Hill Inc., New York (1975).

[5] M.C. Yang: An Investigation into the Dynamic Mechanical Behaviors of Special-shaped Arch Bridges, Master Thesis, Chung Hua University (2011), in Chinese.

[6] Z.Q. Yang: Dynamic Characteristic Analysis of Special-shaped Arch Bridges, Master Thesis, Dalian University of Technology (2009), in Chinese.

[7] M. Berrab and E. Kausel: Response Spectrum Analysis of Structures Subjected to Spatially Varying Motions, Earthquake Engineering and Structural Dynamics, Vol. 21(1992), pp.461-470.

DOI: 10.1002/eqe.4290210601

[8] K.W. Robert: Seismic Response of and Design Aids for Arch Bridges, Journal of Structural Engineering, Vol. 119 No. 10 (1993).