Study on floating process stability of bridge caisson foundation under wave-current action considering fluid–structure coupling simulation

作者：Zechen Xue, Bo Huang, Minglin Chen, Yi Jiang, Jianting Zhou, Dan Zhong, Jiawei Zhou · 发表于：Structure and Infrastructure Engineering · 年份：2025 · DOI：10.1080/15732479.2025.2477134 · 被引用次数：8 · 研究领域：Wave and Wind Energy Systems、Fluid Dynamics Simulations and Interactions、Coastal and Marine Dynamics

With the rapid development of infrastructure construction, an increasing number of coastal bridges are being built with ultra-large and ultra-deep foundations. In practice, the floating process of caisson often encounters the action of waves, currents and even the combined action of wave-currents, which can cause the caisson to sway, heave and pitch motions. However, there is currently limited research on the stability of caisson floating transportation, and the impact of fluid–structure interaction effects is rarely considered in these studies. Therefore, the stability of the large steel caisson floating process, considering fluid–structure interaction effects, is analyzed in this study, with factors affecting the stability of the large steel caisson during floating transportation being investigated. The results indicate that: (1) The sway stability of the caisson when floating is greatly affected by the current, and the heave stability is greatly affected by the wave-current; (2) In the process of floating, the large steel caisson’s max effective stress occurs at the cable-structure joint, with peak fluid velocities on both sides; (3) The buoyancy stability of large steel caissons is significantly influenced by the arrangement of cables, and it has been observed that the DF4 cable arrangement exhibits the highest level of stability.