高桩码头叉桩布置形式抗震性能分析

以湛江某高桩码头单个结构段为研究对象,建立空间有限元模型,采用反应谱法对水平地震作用横向、纵向输入进行地震动力响应分析,对比分析了4种叉桩布置形式在不同水平方向地震作用下码头桩基内力受力特性。计算结果表明:桩基横轴对称布置结构在横向水平地震作用时,整体最大位移和桩内力均较小;桩基双轴对称布置形式在不同水平方向地震作用下结构响应比其他形式相对较小。在高桩码头的抗震设计中,叉桩不会碰桩的情况下,采用桩基双轴对称布置形式较为合理。

Seismic performance analysis of fork pile arrangement type of high-pile wharf

A spatial finite element model was built,and the response spectrum method was used to analyze the dynamic seismic response under the horizontal earthquake effect along the transverse and longitudinal directions,in a structural segment of a high-pile wharf.The internal stress characteristics of the pile foundations of four fork pile arrangements under different horizontal earthquake effects were compared and analyzed.The calculation results show that when the pile foundation in a transverse symmetry arrangement was responding to transverse earthquake effect,the whole maximal displacement and internal force of piles were small,and the structural response of the pile foundation in symmetrical arrangement under different horizontal earthquake effects was smaller than that in other arrangements.When the fork piles do not collide,it is more reasonable to use the symmetrical arrangement type for pile foundations in the seismic design of high-pile wharfs.