A three-dimensional computational analysis of bridges subjected to monochromatic wave attack
A modeled bridge subjected to monochromatic wave train attack was computationally modeled in three dimensions using commercially available software. A number of slightly different geometric variations were computed to learn more about the high-frequency forcing component and to further investigate venting as a mitigation procedure for low lying bridges vulnerable to wave attack. Results appeared to show that the high-frequency component is the result of a combination of reflective effects and trapped air. Additionally, the vertical quasi-static force also appears to be partially caused by trapped air. Transverse venting was investigated as a means to reduce high-frequency forces on the bridges, and these measures appear to be highly effective. Finally a two-dimensional comparison was conducted. Results appear to indicate that while two-dimensional modeling provides valuable insight into the physics associated with this problem, it may miss effects due to lateral air movement.
Journal of Fluids and Structures
Digital Object Identifier (DOI)
Crowley, Robeck, C., & Dompe, P. (2018). A three-dimensional computational analysis of bridges subjected to monochromatic wave attack. Journal of Fluids and Structures, 79, 76–93. https://doi.org/10.1016/j.jfluidstructs.2018.02.001