| V?H荷载作用下海洋平台吸力式桩桶桩土承载特性研究 |
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| 引用本文： | 蒋建平,孙宏涛,高嘉若.V?H荷载作用下海洋平台吸力式桩桶桩土承载特性研究[J].海洋工程,2023,41(6):1-10. |
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| 作者姓名： | 蒋建平 孙宏涛 高嘉若 |
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| 作者单位： | 上海海事大学 海洋科学与工程学院，上海 201306 |
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| 基金项目： | 国家重点研发计划资助项目（2020YFE0201200） |
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| 摘 要： | 用于海洋平台的吸力式桩桶基础作为一种新型平台基础正逐渐成为人们研究的重点。为研究吸力式桩桶单桩基础的受力特性，对V-H（竖向—水平）联合荷载作用下的吸力式单桩基础桩土的承载特性进行了数值模拟，并将数值模拟的有限元解通过与API规范中对p-y曲线的计算方法进行对比来验证有限元模型的可行性，最后采用分级作用力的加载方式对其破坏包络曲线进行绘制，并推导出相应的函数表达式。研究表明，采用ABAQUS有限元分析软件对吸力式桩桶进行数值模拟是可行的，随着对吸力式桩桶所施加V-H联合荷载的不断增大，吸力式桩桶所能体现的应力和弯矩极限值也在随之增大，其位移变化主要在施加荷载的区域附近，最后在联合荷载作用下所体现的极限承载状态，即包络曲线大致呈四分之一的椭圆形状。
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| 关 键 词： | 海洋平台基础 ABAQUS 桩土相互作用 变形程度 破坏包络曲线 |
| 收稿时间： | 2022/12/28 0:00:00 |
Study on bearing characteristics of suction pile and soil of offshore platform under V-H load |
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| JIANG Jianping,SUN Hongtao,GAO Jiaruo.Study on bearing characteristics of suction pile and soil of offshore platform under V-H load[J].Ocean Engineering,2023,41(6):1-10. |
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| Authors: | JIANG Jianping SUN Hongtao GAO Jiaruo |
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| Abstract: | As a new type of platform foundation, the suction pile drum foundation for offshore platforms is becoming a focus of research. In order to study the force characteristics of suction type pile drum monopile foundation, numerical simulation of the bearing characteristics of suction monopile foundation pile soil under combined V-H (vertical and horizontal) load was carried out, and the finite element solution of numerical simulation was compared with the calculation method of p?y curve in API specification to verify the feasibility of the finite element model, and finally the damage envelope curve was plotted by using the loading method of graded action force, and corresponding functional expression was deduced. The study shows that it is feasible to numerically simulate the suction pile bucket using ABAQUS finite element analysis software; as the combined V-H load applied to the suction pile bucket increases, the stress and bending moment limits of the suction pile bucket also increase; and its displacement changes mainly in the vicinity of the area where the load is applied; and finally the limit bearing state embodied in the combined load, that is, the envelope curve, is roughly in the shape of a quarter ellipse. |
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| Keywords: | offshore platform foundation ABAQUS pile soil interaction degree of deformation failure envelope curve |
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