Simulations of High-Piled Wharf Super Structures Based on Ventilation Optimization

Abstract:

The salt fog originated from offshore zone and was easy to gather in the semi-closed space formed by beams and slabs of pile-supported wharf called gridiron space. It could induce the premature failure of substructure durabilityof the wharf. Therefore, numerical simulations are conducted to construct the natural ventilation models and the auxiliary ventilation models to simulate the spatial flow field changes in the gridiron space. It is concluded that when the shield ratio (defined as the height ratio of the edge stringer to the air inlet) in the natural ventilation group is 1.15, the airflow inside the gridiron reaches the weakest turbulence. Under this condition, three auxiliary ventilation measures are proposed to enhance the durability of the pile-supported wharf. The numerical simulation results show that the opening radius of the three measures have little effect on the variation of the air circulation characteristics in the gridiron space. A smaller aperture will greatly reduce the wind speed in the gridiron inlet area. Considering construction difficulty and engineering cost, the plan for opening holes on the board is the best.