Wave Response Analysis Of Different Types Of Deepwater Bridge Foundation

In China, Vigorously popularize the projects for long-span bridge with high piers will involved into the interaction between the structure of bridge in deepwater and the water environment. Deepwater Bridge, the piers or part of foundations of a bridge located in deepwater. The load on the basis of deepwater bridge, not only from the gravity loads of the bridge structure and vehicle loads, also the loads caused by the environment, such as wave, flow, earthquake, wind and so on, these loads are all in the form of dynamic loads on the bridges. Thus, in the field of dynamic analysis of bridge structures, it is great significance that consider the effects of hydrodynamic pressure caused by environment like wave, flow and earthquake on deepwater bridge piers.In the systematically reviewed and summarized the research progress at home and abroad, the paper used the numerical wave tank techniques and numerical simulation analysis methods, carried out the follow aspects of work on the interaction about the wave flow and foundation of deepwater bridge:In the second chapter, based on the ideal fluid, by the wave-make method of definition of the wave velocity and the wave height which set on the boundary in numerical wave tank, set up a two-dimensional numerical wave tank that can make slightly wave, and achieved the numerical wave successfully and good effect. Based on the two-dimensional wave tank, three-dimensional numerical tank was established by the wave boundary method, and verified the wave-make effect of the model.In the fourth chapter, combined with structural analysis software ABAQUS and fluid analysis software FLUENT, numerical simulate on FSI. Set up a three-dimensional numerical tank with a small-scale column structure by the method of fluid numerical simulation, considered the interaction between the bridge with different types of section and the field of slightly wave, the constant flow and combined effects of wave and current field, proposed a new way to analysis the FSI about water and bridge. And comparing to the traditional method on calculate the wave forces in fluid-solid analysis.In the fifth chapter, based on the numerical analysis of fluid-structure interaction problems, simulated the interaction between the water field which combined the slightly wave and the constant flow and the different types basis of deepwater bridge. Under different conditions, think over the dynamic response and dynamic characteristics of bridge with the group of columns, and proposed the correction factor of wave forces coefficient in the projects of deepwater bridge with the same type.Set up a pier model of bridge in the wave-current field, verified calculate the wave force drag coefficient of typical cross-section column by the numerical simulation of fluid-structure interaction in this article is in match with the traditional method of wave force drag coefficient. And through the establishment of multi-column model, analyze the issues in the constant wave and current field, the wave force drag coefficient of column with linear relationship between changes of the length and diameter circular section.