Analysis of the Influence of Deep Water on the Seismic Response of Rectangular-Section High-Pile Bridges
Shao-Qian Luo （ Kunming Survey and Design Institute of State Forestry and Grassland Administration, Kunming, Yunnan, 650000, China ）
https://doi.org/10.37155/2972-483X-0304-4Abstract
With bridge construction increasingly extending into deep-water regions, the influence of deep water on the seismic response of rectangular-section high-pier bridges has become a critical issue that cannot be ignored. Focusing on this type of bridge, this study investigates the effects of deep water based on pier– water coupled vibration theory and analyzes methods for calculating hydrodynamic pressure. The results indicate that deep water can significantly prolong the natural vibration period of the structure, alter vibration modes, and affect damping characteristics, while also exhibiting strong sensitivity to site conditions. In terms of seismic response, deep water amplifies pier-top displacement and modifies internal forces at the pier base. Moreover, the coupled effects of near-field and far-field earthquakes, as well as multi-directional ground motions, show distinct characteristics. Taking a heavy-load highway continuous rigid-frame bridge in a hydropower reservoir area as an example, this paper proposes seismic design recommendations such as cross-sectional optimization, providing both theoretical insight and practical guidance for seismic design of similar bridges.
Keywords
Deep water; rectangular-section high-pier bridge; seismic response; seismic designFull Text
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Copyright © 2025 Shao-Qian Luo
Publishing time:2025-08-30
This work is licensed under a Creative Commons Attribution 4.0 International License