遮帘式板桩码头三维地震动响应

为研究遮帘式板桩码头在地震作用下板桩结构与土的相互作用,及前墙弯矩、遮帘桩弯矩和拉杆拉力的变化情况,运用ABAQUS软件研究京唐港32#遮帘式板桩码头在不同加速度峰值的地震载荷作用下的动态响应.结果表明,不同加速度峰值地震波对码头结构有重要影响,地震加速度峰值每增大0.1g,前墙最大弯矩增大约10%,遮帘桩最大弯矩增大约21%,后拉杆拉力增大约25%.地震动土压力对海底标高以上的前墙结构作用不明显,对海底标高以下前墙部分影响较大,对遮帘桩沿桩身分布的动土压力显著;在地震作用下遮帘桩依然发挥前墙挡土的作用.

3D seismic dynamic response of covered sheet piled wharf

In order to analyze the pile soil interaction, front sheet pile bending moment, covered pile bending moment, and rod tension of covered sheet piled wharf under earthquake action, the dynamic response of covered sheet piled wharf of the 32# berth of Jingtang Harbor under seismic load with different peak acceleration is studied by ABAQUS. The result shows that the seismic wave of varied peak acceleration has a significant impact on wharf structure. As peak ground acceleration grows by 0.1g, the front wall maximum bending moment roughly increases by 10%, covered pile maximum bending moment by 21% and back rod tension force by 25%. Dynamic earth pressure has a slight influence on the front wall above seafloor level but a relatively great influence on the wall below seafloor level, and a remarkable influence on dynamic earth pressure distributing along covered pile. Under the influence of seismic action, the covered pile still acts as a screen against soil for the front wall.