摘要
为研究海上大直径深埋桩基础在波浪作用下水平位移受因素影响的主次关系,综合考虑外部环境、桩身结构和地基性质等3个方面的影响,借助Abaqus软件进行6因素5水平正交数值模拟试验。计算结果表明:对于桩顶最大位移差值,敏感性主次关系为波高>水深>桩径>泊松比>埋深>摩擦角;对于桩基泥面点最大位移差值,敏感性主次关系为波高>埋深>泊松比>水深>桩径>摩擦角。由指标趋势图可知:桩顶最大位移与水深呈正相关关系;桩基泥面点最大位移与波高呈正相关关系;桩基泥面点最大位移与埋深呈负相关关系。方差分析结果显示:水深和波高对桩顶最大位移有极显著性影响;波高对桩基泥面点最大位移有显著性影响。得到结论如下:大直径深埋桩水平位移主要受波浪载荷影响,其对波浪载荷变化的响应最明显。
In order to study the primary and secondary relationship of the influencing factors on the horizontal displacement of large-diameter deep-buried pile foundation under wave action,considering the influence of external environment,pile structure and foundation properties,the orthogonal numerical simulation test of 6 factors and 5 levels is carried out by Abaqus software.The calculation results show that:for the maximal displacement difference of the pile top,the primary and secondary relationship of sensitivity is wave height>water depth>pile diameter>Poisson's ratio>burial depth>friction angle;for the maximal displacement difference of the mud surface point of the pile foundation,the primary and secondary relationship of sensitivity is wave height>burial depth>Poisson's ratio>water depth>pile diameter>friction angle.According to the index trend diagram:the maximal displacement of the pile top is positively correlated with the water depth;the maximal displacement of the mud surface point of the pile foundation is positively correlated with the wave height;the maximal displacement of the mud surface point of the pile foundation is negatively correlated with the burial depth.The results of variance analysis show that:water depth and wave height are of significant effect on the maximal displacement of pile top;the wave height is of significant effect on the displacement of the mud surface point of the pile foundation.It is concluded that the horizontal displacement of large-diameter deep-buried pile is mainly affected by wave loads,and its response to the changes of wave loads is the most obvious.
作者
张其一
肖明凤
ZHANG Qiyi;XIAO Mingfeng(College of Engineering,Ocean University of China,Qingdao 266100,Shandong,China)
出处
《中国海洋平台》
2025年第2期45-51,108,共8页
China offshore Platform
关键词
深埋桩
波浪
位移
正交试验
deep-buried pile
wave
displacement
orthogonal test
