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J4  2014, Vol. 48 Issue (4): 721-726    DOI: 10.3785/j.issn.1008-973X.2014.04.023
土木工程     
刚度衰减模型在大直径桩累积侧向位移分析中的应用
胡安峰1,2, 张光建1,2,3, 贾玉帅1,2, 张晓冬1,2
1. 浙江大学 滨海和城市岩土工程研究中心,浙江 杭州 310058;2. 浙江大学 软弱土与环境土工教育部重点实验室,
浙江 杭州 310058;3. 中冶集团武汉勘察研究院有限公司,湖北 武汉 430080
Application of degradation stiffness model in analysis of cumulative lateral displacement of monopile foundation
HU An-feng1,2, ZHANG Guang-jian1,2,3, JIA Yu-shuai1,2, ZHANG Xiao-dong1,2
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. Key Laboratory of Soft Soil and Environmental Geotechnical Engineering of Ministry of Education,
Zhejiang University, Hangzhou 310058, China; 3. Wuhan Surveying-geotechnical Research Institute
Limited Company of MCC , Wuhan 430080, China
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摘要:

利用土体刚度衰减模型,研究风机桩基础在长期风浪荷载作用下的累积侧向位移问题.基于砂土室内动三轴试验数据,得到刚度衰减模型的回归系数,对ABAQUS进行二次开发以实现土体刚度衰减模型,考虑循环次数、荷载频率及荷载大小对风机桩基础水平位移的影响.结果表明,不同荷载频率对钢管桩侧向位移发展的影响程度不同,存在某一特定荷载频率,使得钢管桩的侧向位移发展十分迅速.当循环荷载较小时,钢管桩泥面处水平位移随着循环的进行逐渐稳定.当循环荷载超过一定大小后,泥面处水平位移急剧发展且不再稳定.

Abstract:

The degradation soil stiffness model was used to analyze cumulative lateral displacement of monopile foundation for offshore wind turbine under long-term wind and wave loads. The degradation soil stiffness model was realized in ABAQUS based on the analysis of the dynamic triaxial test results. The influence of number of cycles, the frequency and size of cyclic load on horizontal displacement of monopile was considered. Results show that load frequency has different effect on the development of horizontal displacement of monopile, and horizontal displacement develops quickly at a certain frequency. The mud surface displacement of monopile is gradually stable with the cyclic loading going on at a low level, but it develops rapidly and no longer remains stable when the cyclic load exceeds a certain size.

出版日期: 2014-09-03
:  TU 473  
基金资助:

浙江省自然科学基金资助项目(Y14E080073).

作者简介: 胡安峰(1974―),男,副教授,从事桩基工程与近海岩土工程的研究. E-mail: anfenghu@zju.edu.cn
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引用本文:

胡安峰, 张光建, 贾玉帅, 张晓冬. 刚度衰减模型在大直径桩累积侧向位移分析中的应用[J]. J4, 2014, 48(4): 721-726.

HU An-feng, ZHANG Guang-jian, JIA Yu-shuai, ZHANG Xiao-dong. Application of degradation stiffness model in analysis of cumulative lateral displacement of monopile foundation. J4, 2014, 48(4): 721-726.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.04.023        http://www.zjujournals.com/eng/CN/Y2014/V48/I4/721

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