Collision Damage Characteristics of Ship Bridge Considering Pile-Water-Soil Coupling
The ship-bridge collision problem is a complex nonlinear dynamics problem,and the existing empirical formulas can only predict the maximum collision force,but cannot predict the damage characteristics of ship-bridge structure comprehensively,and the finite unit method can effectively supplement the deficiency.LS-DYNA software is used to study the impact damage characteristics of ship bridge considering pile-soil interaction and fluid-structure coupling effect.Firstly,the accuracy of the reinforced concrete material model and the effectiveness of the pile-water-soil coupling method are verified by comparing the numerical simulation with the experimental results and the AASHTO code formulation,respectively.Secondly,the collision damage characteristics of ship and bridge pier pile structure under typical collision scenarios are analyzed.Finally,the impact of ship speed,ship impact angle and other factors on the collision damage of ship and bridge is discussed.The results show that the typical ship and bridge collision scenario ship,bridge pier structure damage are more serious;the ship collision speed,the larger the angle,the larger the peak collision force;the pile soil action and fluid-solid coupling effect are not negligible.It can provide a certain reference for the design of ship and bridge pier structure.
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