Seismic Response Analysis of Deep Water Bridges with Pile Group Foundations

Abstract:

In this paper, we intended to replace the fluid-structure interaction of deep water bridge piers with acceleration-dependent forces during an earthquake. The hydrodynamic pressure on bridge pier groups under seismic excitation is studied using the finite volume method. Different seismic waves with various spectrum components are selected in order to cover frequently encountered cases. The calculated forces of these cylinders are fitted into the Morison equation, and by calculation, the drag force term is negligible, thus the effect of fluid is converted into one added mass term. The paper further calculated the dynamic response of a continuous beam bridge with pier groups in water to check the validity of our proposed method.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 1494-1498
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.1494
• Online since: July 2014
• Authors: Dong Xiao Zhao, Jun Jie Wang*, Jun Sheng Su
• Keywords: Dynamic Mesh, Finite Volume Method (FVM), Fluid-Structural Interaction, Morison Equation, Seismic Dynamic Response

References

[1] Karadeniz H. Spectral analysis of offshore structures under combined wave and earthquake loadings[C]. The Proceedings of the International Offshore and Polar Engineering Conference. International Society of Offshore and Polar Engineers, (1999).

DOI: 10.1007/978-1-84996-190-5_4

[2] Etemad A K, Gharabaghi A R M, Chenaghlou M R. Nonlinear Dynamic Behavior of Fixed Jacket-Type Offshore Platforms Subjected to Simultaneously Acting Wave and Earthquake Loads[C] ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. American Society of Mechanical Engineers, (2004).

DOI: 10.1115/omae2004-51498

[3] Bai Degui., Seismic response analysis of bridge pier supported by pile foundation considering the effect of wave and current. Nanjing University of Technology, (2008).

[4] WEI Kai, WU Yong-ji, XU Can et al. NUMERICAL DYNAMIC ANALYSIS FOR WATER- PILE GROUP BRIDGE FOUNDATION INTERACTED SYSTEM [J]. Engineering Mechanics, 2011, 28(Supplement I): 195-200. (In Chinese).

[5] Morison J R, Johnson J W, Schaaf S A. The force exerted by surface waves on piles[J]. Journal of Petroleum Technology, 1950, 2(05): 149-154.

DOI: 10.2118/950149-g

[6] Sarpkaya T. Force on a circular cylinder in viscous oscillatory flow at low Keulegan-Carpenter numbers [J]. Journal of Fluid Mechanics, 1986, 165: 61-71.

DOI: 10.1017/s0022112086002999