首页|不同桩-土界面摩擦系数对水平荷载下大直径单桩变形特性影响研究

不同桩-土界面摩擦系数对水平荷载下大直径单桩变形特性影响研究

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为研究不同桩-土界面摩擦系数对水平荷载下大直径单桩变形特性的影响，根据现场试验及室内循环剪切试验结果，采用Abaqus软件及可考虑软土软化效应的本构模型进行数值模拟。结果表明:提高桩-土界面摩擦系数可在一定程度上减少桩顶位移，其减少程度与桩土相对位移呈正相关。桩-土界面摩擦系数变化区间为0。1～0。5，在水平静载作用下，桩-土界面摩擦系数对桩顶位移的影响随荷载的增大而增大，随桩径的增大而减小。水平循环荷载作用下，桩-土界面摩擦系数对桩顶位移及桩周土体软化程度的影响随荷载峰值、荷载频率、循环次数的增大而增大，桩顶位移减小值最大可达25。85％，桩周土体软化程度最大可达17％。
Influence of Different Pile-soil Interface Friction Coefficients on Deformation Characteristics of Large Diameter Monopiles Under Horizontal Load
In order to study the effect of pile-soil interface friction coefficients on the deformation characteristics of large-diameter monopile under horizontal loading,numerical simulations were carried out by finite element software Abaqus combined with a constitutive model considering softening effect of soft soil,based on the results of field tests and indoor cyclic shear tests.The results indicate that increasing the coefficient of friction at the pile-soil interface can reduce the pile top displacement to a certain extent,and the degree of reduction is positively correlated with the relative pile-soil displacement.When the variation interval of pile-soil interface friction coefficient is 0.1～0.5,the influence of pile-soil interface friction coefficient on pile top displacement under horizontal static loading increases with the increase of load and decreases with the increase of pile diameter.Under horizontal cyclic loading,the effect of pile-soil interface friction coefficient on pile top displacement and softening degree of soil around the pile increases with the increase of peak load,load frequency and cycle times,and the maximum reduction value of pile top displacement can be up to 25.85％,and the maximum softening degree of soil around the pile can be up to 17％.

large-diameter monopilehorizontal loadpile-soil interface friction coefficientnumerical simulationstrain softening effect

黄晨虓、郑许冬、刘开友、张智卿、刘开富

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浙江理工大学建筑工程学院,浙江杭州 310018

浙江大学温州研究院,浙江温州 325000

浙江易通特种基础工程股份有限公司,浙江宁波 315800

温州理工学院建筑与能源工程学院,浙江温州 325035

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大直径单桩 水平荷载 桩-土界面摩擦系数 数值模拟 应变软化效应

国家自然科学基金国家自然科学基金国家自然科学基金浙江省公益技术应用研究项目浙江省自然科学基金联合项目住建国家重点研发计划

518786195207846552178367LGG22E080015LHZ23E0800022021-K-092

2024

10.3969/j.issn.2095-7092.2024.01.006

浙江水利水电学院学报
浙江水利水电专科学校

浙江水利水电学院学报

影响因子：0.403
ISSN：2095-7092
年,卷(期)：2024.36(1)
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