[1]牛壮壮,俞 剑,黄茂松.大直径单桩水平循环弱化有限元分析[J].防灾减灾工程学报,2019,39(01):153-157.[doi:10.13409/j.cnki.jdpme.2019.01.021]
 NIU Zhuangzhuang,YU Jian,HUANG Maosong.Finite Element Modelling on Degradation of a Monopile Subjected to Cyclic Lateral Loads[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(01):153-157.[doi:10.13409/j.cnki.jdpme.2019.01.021]
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大直径单桩水平循环弱化有限元分析()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年01期
页码:
153-157
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Finite Element Modelling on Degradation of a Monopile Subjected to Cyclic Lateral Loads
文章编号:
1672-2132(2019)01-0153-05
作者:
牛壮壮12 俞 剑12 黄茂松12
1.同济大学地下建筑与工程系,上海 200092; 2.同济大学岩土及地下工程教育部重点试验室,上海 200092
Author(s):
NIU Zhuangzhuang1 YU Jian1 HUANG Maosong12
1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China
关键词:
非线性运动硬化 水平荷载 循环弱化 饱和黏土
Keywords:
nonlinear kinematic hardening saturated clay lateral load cyclic degradation
分类号:
TU443
DOI:
10.13409/j.cnki.jdpme.2019.01.021
文献标志码:
A
摘要:
处于复杂海洋环境下的大直径单桩基础需要承受波流等长期水平循环荷载作用,建立能反映其循环弱化特性的有限元分析方法尤为重要。为此,采用非线性运动硬化准则和饱和软黏土循环弱化模型描述土体循环加载时的滞回特性和强度弱化,并建议了模型参数的选取方法。为验证该本构模型在分析桩土循环弱化时的有效性,先将大直径单桩循环加载有限元模拟结果与离心试验结果进行对比。并进一步研究了循环位移幅值、弱化参数对于大直径单桩基础桩顶反力弱化的影响。
Abstract:
monopile foundation under complex marine environment is always subjected to long-term cyclic loads such as wave and currents.Therefore, it is necessary to establish a corresponding finite element analysis method.In this study, a nonlinear kinematic hardening criterion with cyclic degradation characteristic is employed to describe the cyclic hysteresis and softening characteristics of undrained soft clay.A method of determining the model parameters is recommended.By comparing the results from the centrifuge test of a cyclic lateral monopile with those from the finite element simulation, the effectiveness of the model is verified.Finally, parametric studies on the effect of the displacement cyclic amplitude and the softening parameter on the lateral resistance of the monopile are conducted.

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备注/Memo

备注/Memo:
收稿日期:2018-05-30; 修回日期:2018-09-22 基金项目:国家自然科学基金项目(51579177)、上海市科委科研计划项目(18DZ1202104)资助 作者简介:牛壮壮(1994-),男,硕士研究生。主要从事岩土工程研究。Email:niuzhuangzhuang@tongji.edu.cn 通讯作者:黄茂松(1965-),男,教授,博士。主要从事岩土工程方面的教学与研究。Email:mshuang@tongli.edu.cn
更新日期/Last Update: 2019-02-20