岩土力学2024，Vol.45Issue(1)：77-86,10.DOI:10.16285/j.rsm.2023.0099
可液化场地桩基震后水平变形预测模型研究
Lateral deformation prediction model of pile foundation in liquefiable site
摘要
Abstract
Field measurements in offshore areas have revealed that wind turbines are mainly exposed to large-amplitude and long-duration horizontal environmental loads,and those located in high-intensity areas are particularly susceptible to seismic activity during service life.However,it remains unclear how the initial horizontal loads affect the seismic behaviour of offshore wind turbines,particularly with respect to pile-soil interaction.To address this issue,this study employed the ZJU-400 centrifuge shaking table to conduct a series of centrifuge tests on a single rock-socketed pile in liquefiable saturated sands,with its prototype located in the offshore wind farm in Fujian waters.The experimental results demonstrate the bending moment and displacement responses of the pile subjected to the seismic loads in combination with initial horizontal loads.The proposed p-y model introduces a parameter related to excess pore water pressure to quantify its weakening effects on pile-soil interaction as observed in the centrifuge tests.When combined with the nonlinear Winkler foundation beam model,the proposed post-earthquake prediction model can effectively estimate the bending moment and displacement distribution of monopiles under initial lateral loading.关键词
近海风机/初始水平荷载效应/动力p-y曲线/超重力振动台Key words
offshore wind turbines/initial lateral load effect/dynamic p-y curves/centrifuge shaking table分类
土木建筑引用本文复制引用
吴小锋,张笛,李星,汪玉冰,文凯..可液化场地桩基震后水平变形预测模型研究[J].岩土力学,2024,45(1):77-86,10.基金项目
浙江省博士后科研项目择优资助项目(No.ZJ20221131) （No.ZJ20221131）
国家自然科学基金基础科学中心项目(No.51988101) （No.51988101）
国家自然科学基金重点项目(No.51808490).This work was supported by the Postdoctoral Science Advanced Programs of Zhejiang Province(ZJ2022113),the Basic Science Center Program of the National Natural Science Foundation of China(51988101)and the National Natural Science Foundation of China(51808490). （No.51808490）
