Seismic Response and Earthquake Mitigation Optimal Analysis of Self-Anchored Suspension Bridge

Abstract:

This paper established a spatial nonlinear finite element model based on the earthquake dynamic equation and the seismic response of a self-anchored suspension bridge is calculated. Taking the pylon bottom force as objective function, optimization theory is used to obtain the viscous damper parameters. Seismic responses of viscous dampers in different positions are also discussed. The results show that pylon bottom moment is 117492.0KN•m in earthquake and it is a key factor for bridge design. The best parameters of viscous dampers can be obtained using optimization theory and the calculating work reduced largely. Longitudinal displacement of the girder reduced 83% and the pylon bottom longitudinal moment reduced 62% if install viscous damper with appropriate parameters. The positions of dampers installed affect the seismic response largely, the variety of force and displacement in the structure must be fully considered.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 2378-2382
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.2378
• Online since: May 2012
• Authors: Xu Ming Song, Mian Tang
• Keywords: Earthquake Mitigation, Optimal Calculation, Seismic Response, Self-Anchored Suspension Bridge, Viscous Damper

References

[1] John A O, David P B. Journal of Bridge Engineering, 1999, 4 (3):151-156.

[2] Ho-Kyung Kim, Myeong-Jae Lee, Sung-Pil Chang. Engineering Structures, 2006, 28 (7):959-976.

[3] Zhi-qiang WANG, Shi-de HU, Li-chu FAN. China Journal of Highway and Transport, 2005，18(3)：37-42(In Chinese).

[4] Uang C M, Frieder S, Cole C M.Earthquake Engineering and Structural Dynamics. 2005, 34: 393-408.

[5] Meng-gang YANG, Jian-hua HU, Zheng-qing CHEN. Journal of Central South University (science and technology). 2005，36(1)：133-137(In Chinese).

[6] MARTINEZ-RODRIGO M, ROMERO M L. Engineering Structure, 2003, 25: 913 – 925.

[7] Zhong-chu TIAN, Xue-feng LIU, Dong-huang YAN, etc. China Journal of Highway and Transport, 2008,21(2):74-78(In Chinese).

[8] Zhong-ping LIU. Study on seismic response of sanchaji xiangjiang self-anchored bridge [D]. Central-South University, 2007(In Chinese).