平面形状不规则对高桩码头地震效应的影响

Seismic Effect of Irregular Plane Shape on Pile-supported Wharf

为了进一步明确平面形状不规则对高桩码头地震效应的影响,以L型平面不规则高桩码头为例,基于美国Northridge地震波,采用ABAQUS有限元软件对比分析了平面形状不规则与规则高桩码头的地震反应,研究了平面形状不规则对高桩码头各桩桩顶水平力、弯矩及结构整体扭转角的影响。结果表明,高桩码头平面形状不规则会导致桩顶水平力和结构整体扭转角的增大,桩基地震破坏数目增加;平面形状不规则高桩码头转角部位桩群水平力峰值普遍较大,且应力复杂,设计中需重点考虑。

In order to further identify the seismic influence of the plane irregularity on pile-supported wharf, taking a L type irregular plane pile-supported wharf for an example, based on the American Northridge motion, the difference be- tween the irregular and regular plane pile-supported wharf on the seismic response is analyzed with the ABAQUS soft ware. And the effects of the plane irregularity on the lateral force and the bending moment at the pile heads and the over- all torsion angle of the pile-supported wharf are studied. The conclusion is that the plane irregularity of the pile-supported wharf can result in the increase of the lateral force at the pile heads, the overall torsion angle of the wharf structure and the number of the damaged piles; the lateral force peak at the corner part of the irregular plane pile-supported wharf is generally large, and the stress is very complex, so this part needs a significant consideration in design.