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Calculation of monopile foundation in sand to long-term lateral cyclic load
Marine Georesources & Geotechnology ( IF 2.2 ) Pub Date : 2020-08-11 , DOI: 10.1080/1064119x.2020.1802793
Chenrong Zhang 1, 2 , Feng Yu 1, 2 , Maosong Huang 1, 2 , Zhiqi Zhu 3
Affiliation  

Abstract

Monopiles are widely used to support the upper structures of wind turbines in offshore engineering. Due to harsh environmental conditions, they are subjected to long-term lateral cyclic loading from waves and winds during the design life. A robust beam on the Winkler foundation model is presented to analyze the responses of monopile foundation under long-term lateral cyclic load, incorporating cyclic stiffness evolution of sand based on the results of drained cyclic triaxial tests. The reasonability of the model is proved by comparison with a published centrifuge model test. Furthermore, a parametric analysis is performed to study the effects of pile diameter, pile eccentricity, embedment depth and cyclic load amplitude to the accumulation of deformation at the pile head during the long-term lateral cyclic load, based on which an empirical expression for estimating the accumulated displacements of a long-term lateral loaded monopile under cyclic loads is given.



中文翻译:

砂中单桩基础对长期横向循环荷载的计算

摘要

单桩在海上工程中被广泛用于支撑风力涡轮机的上部结构。由于恶劣的环境条件,它们在设计寿命期间承受来自波浪和风的长期横向循环载荷。文克勒地基模型上的鲁棒梁用于分析单桩地基在长期横向循环载荷下的响应,结合基于排水循环三轴试验结果的沙子循环刚度演变。通过与已发表的离心机模型试验对比,证明了模型的合理性。此外,还进行了参数分析,以研究在长期横向循环荷载过程中,桩径、桩偏心距、埋置深度和循环荷载幅值对桩头变形累积的影响,

更新日期:2020-08-11
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