低桩承台重力式码头地震响应分析

为探究不同刚度低桩承台结构重力式码头地震响应规律,首先利用ABAQUS建立了某重力式码头的精细化有限元模型,其次改变低桩承台结构的桩数、桩径及混凝土强度等级,来获取不同低桩承台的刚度,最后输入三向空间地震动,以此探究低桩承台重力式码头随低桩承台刚度变化的地震响应规律。分析表明:当桩-承台结构刚度改变时,结构整体水平位移随桩径增大而减小、随混凝土强度增大而增大、随桩数增加而增大;结构峰值加速度随桩数增加而增大、随桩径增大而减小;桩侧动土压力远大于码头后动土压力,桩侧动土压力随桩数增加而增大、随桩径增大而增大、随混凝土强度等级提高而减小。

Seismic Response Analysis of Gravity Wharf with Low Pile Cap

In order to explore different low stiffness of pile caps of gravity wharf structure dynamic response rules, the first of a gravity wharf was established based on ABAQUS finite element model refinement, secondly the changing structure of low pile caps on the number of piles, pile diameter and the concrete strength grade, to get different low stiffness of the pile caps, the input three ground motion to the space, to explore the low pile caps of gravity wharf with low seismic response of the pile caps stiffness change rule. The analysis shows that when the stiffness of pile-cap structure changes, the overall horizontal displacement of the structure decreases with the increase of pile diameter, increases with the increase of concrete strength, and increases with the increase of pile number. The peak acceleration increases with pile number and decreases with pile diameter. The dynamic earth pressure at the pile side is much higher than that at the back of the wharf. The dynamic earth pressure at the pile side increases with the increase of pile number, pile diameter and concrete strength grade.