Abstract
In this study, a three-dimensional numerical model for a pile-cap system of an offshore bridge is developed to examine the pile group effect on wave force of pile with different arrangements of the pile group with a pile-cap system. In the present model, the Reynolds-averaged Navier-Stokes equation is taken as the governing equation for wave motion, while the volume of fluid method is used to trace the free water surface. Based on the present model, a set of analysis was conducted to examine the influence of the pile-cap system on the pile group effect, including the arrangement of the pile group, the submerged depth of the bridge cap, and the existence of the cap. Numerical examples show that the present model overall agreed well with the previous experimental data. The existence of the cap and submerged coefficient of the cap have a significant influence on the pile group effect coefficient. During the study of the pile group effect on the wave force of a pile with a pile-cap system of an offshore bridge, the influence of the existence of the cap on the pile group effect needs to be considered.
Highlights
Pile foundations have been commonly used in deep-water long-span offshore bridge construction due to their low cost, convenient construction, and structural efficiency [1,2,3]
Most of the piles and caps are often submerged in the water, the design of long-span offshore bridges need to consider the wave forces on piles with different arrangements of the pile-group and the existence of the large-scale cap
The wave forces on a pile are significantly influenced by the arrangements of the pile-group, which is commonly divided into three kinds of basic arrangements according to the angle between the wave direction and the connecting line of the piles’ center, which includes tandem, stagger, and side-by-side
Summary
Pile foundations have been commonly used in deep-water long-span offshore bridge construction due to their low cost, convenient construction, and structural efficiency [1,2,3]. Most of the piles and caps are often submerged in the water, the design of long-span offshore bridges need to consider the wave forces on piles with different arrangements of the pile-group and the existence of the large-scale cap. Effect on wave forces of the with the existence of a capbridge should have useful references to the Inand this construction study, a three-dimensional model for pile–cap system for an offshore bridge is design of the offshore numerical bridge with the pile-cap system. Based present model, a set works of analyses was with the experiment numerical simulation show thaton thethe wave-structure model correctly conducted to examine the influence of the pile–cap system on the pile group effect, including the in simulating the wave forces on the structure. Was conducted to examine the influence of the pile-cap system on the pile group effect, including the arrangement of the pile group, the submerged depth of the bridge cap, and the existence of the cap
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