本文關(guān)鍵詞： 海上風(fēng)電 樁土作用 p-y曲線 ABAQUS SACS　出處：《中國海洋大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：海上風(fēng)能作為綠色可再生能源是現(xiàn)在研究熱點(diǎn)之一，受水平荷載的風(fēng)電基礎(chǔ)樁土作用研究也受到廣泛關(guān)注。海上風(fēng)電基礎(chǔ)結(jié)構(gòu)常受承受風(fēng)、浪、流等荷載聯(lián)合作用，其樁基也常受到水平荷載的作用。單樁基礎(chǔ)是一種傳統(tǒng)的海上風(fēng)電基礎(chǔ)形式。隨著近年風(fēng)機(jī)發(fā)電功率的增大，單樁基礎(chǔ)結(jié)構(gòu)的直徑也逐漸增大，對其形式的研究也越來越必要。水平受荷樁的計(jì)算方法中p-y曲線法不僅能夠反映樁土相互作用的彈塑性發(fā)展過程，還可以通過參數(shù)選取模擬得到與實(shí)際相符的計(jì)算結(jié)果，是目前廣泛使用的計(jì)算方法。隨著大直徑單樁基礎(chǔ)的發(fā)展，有必要對大直徑樁的p-y曲線進(jìn)行進(jìn)一步研究。 本文介紹了海上風(fēng)電樁土相互作用的研究方法及現(xiàn)狀，并重點(diǎn)介紹了幾種典型的p-y曲線模型。結(jié)合某海域?qū)崪y地質(zhì)報(bào)告數(shù)據(jù)，主要做了以下工作： （1）整理了某地現(xiàn)場實(shí)測p-y曲線，分析樁土參數(shù)對實(shí)測p-y曲線的影響，并通過合理的標(biāo)準(zhǔn)化參數(shù)將p-y曲線歸一化處理，選用雙曲線模型對歸一化實(shí)測p-y曲線進(jìn)行了較好地?cái)M合。 （2）分析了目前對土體極限抗力的研究，選取合理的模型參數(shù)。雙曲線模型可以用于計(jì)算海床土中的水平受荷樁分析，并將樁徑和施工方法的影響考慮其中。 （3）采用有限元軟件ABAQUS和SACS對比分析了大直徑樁算例，驗(yàn)證了雙曲線模型在大直徑樁應(yīng)用中的有效性。 （4）采用有限元軟件ABAQUS和SACS對于大直徑樁計(jì)算中規(guī)范推薦的p-y曲線法的適用性進(jìn)行了對比分析，結(jié)果表明，規(guī)范推薦的p-y曲線用于大直徑單樁的樁土作用過于保守。 雙曲線模型得到的大直徑樁實(shí)測p-y曲線形式簡單，在保證精度的前提下，計(jì)算過程較簡化。通過模型參數(shù)的選取，可以將樁徑和施工效應(yīng)等因素的影響加以考慮，因此，可廣泛適用于海洋工程中水平受載樁的p-y曲線分析，，為工程實(shí)際提供了有益參考。
[Abstract]:Offshore wind energy as a green renewable energy is one of the research hotspots at present. The study on pile-soil action of wind power foundation under horizontal load is also widely concerned. Offshore wind power infrastructure is often subjected to wind and waves. Single pile foundation is a traditional offshore wind power foundation. With the increase of fan power generation power in recent years. As the diameter of single pile foundation increases gradually, it is more and more necessary to study its form. The p-y curve method can not only reflect the elastic-plastic development process of pile-soil interaction in the calculation method of horizontally loaded pile. It can also be obtained by parameter selection simulation, which is widely used at present, with the development of large diameter single pile foundation. It is necessary to further study the p-y curves of large diameter piles. This paper introduces the research methods and present situation of pile-soil interaction in offshore wind power, and emphatically introduces several typical p-y curve models. Combined with the measured geological data of a certain sea area, the main work is as follows: 1) the field measured p-y curves are sorted out, the influence of pile-soil parameters on the measured p-y curves is analyzed, and the p-y curves are normalized by reasonable standardized parameters. The hyperbolic model is used to fit the normalized measured p-y curves. The hyperbolic model can be used to calculate the horizontal pile in the seabed soil. The influence of pile diameter and construction method is considered. The finite element software ABAQUS and SACS are used to compare and analyze the calculation examples of large diameter piles, and the effectiveness of hyperbolic model in the application of large diameter piles is verified. 4) the applicability of p-y curve method recommended by code in calculation of large diameter pile is compared and analyzed by using finite element software ABAQUS and SACS, and the results show that. The p-y curve recommended by the code is too conservative for the pile-soil action of large diameter single pile. The measured p-y curve obtained by hyperbolic model is simple, and the calculation process is simplified on the premise of ensuring accuracy. The influence of pile diameter and construction effect can be taken into account, so it can be widely applied to the p-y curve analysis of horizontal loaded piles in ocean engineering, which provides a useful reference for engineering practice.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU476

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