海上风机基础灌浆连接段压弯性能有限元分析

详细信息    查看全文 | 推荐本文 |

英文篇名：Numerical Analysis of Grouted Connection for Offshore Wind Turbine Substructures 作者：陈涛 ; 张持海 ; 赵淇 ; 王衔 ; 元国凯 ; 刘晋超 英文作者：CHEN Tao;ZHANG Chihai;ZHAO Qi;WANG Xian;YUAN Guokai;LIU Jinchao;Department of Structural Engineering,Tongji University;China Energy Engineering Group Guangdong Electric Power Design Institute; 关键词：海上风机基础 ; 灌浆连接段 ; 压弯荷载 ; 有限元 英文关键词：offshore wind turbine foundation;;grouted connection;;axial compression and bending load;;finite element analysis 中文刊名：JGGC 英文刊名：Structural Engineers 机构：同济大学建筑工程系;中国能源建设集团广东省电力设计研究院; 出版日期：2019-04-28 出版单位：结构工程师 年：2019 期：v.35 基金：国家重点研发计划(2017YFC1500704) 语种：中文; 页：JGGC201902012 页数：8 CN：02 ISSN：31-1358/TU 分类号：97-104

摘要

灌浆连接段在海上风机支撑结构中得到了广泛运用。由于灌浆连接段独特的几何构成,其内部浆体的变形和应力状态难以用试验方式得到。因此,基于已有试验结果,利用有限元软件ABAQUS对灌浆连接段试件在压弯荷载下的力学性能进行了分析。将有限元分析结果与试验结果对比,从试件破坏形态、荷载-位移曲线和钢管纵向应变分布三方面验证了有限元模型的可靠性。基于有限元分析结果,对灌浆连接段浆体及钢管的应力分布和变形进行深入分析,进而得到了灌浆连接段压弯荷载的传递机理。研究结果表明:灌浆连接段主要通过形成灌浆料斜压短柱来将荷载从套管传递至桩管,且钢管的破坏先于灌浆体。
        The grouted connection has been widely used in offshore wind turbine support structures.Due to the unique geometrical structure,it is difficult to obtain the deformation and stresses distribution of the grout through experiment study.Therefore,mechanical behaviors of the grouted connections under combined bending and axial loading were studied by using finite element software ABAQUS.The numerical results were verified by the experimental results with comparisons of failure modes,load displacement curves and longitudinal strain distribution of steel tubes.Furthermore,the stress distribution and deformation of the grout,the inner and outer steel tube were analyzed in depth,thus the load transmission mechanism of the grouted connection was clarified.The results show that the grout transfer load from the sleeve to the pile through the formation of oblique compression struts,and the damage of the steel pipe precedes the grout failure.

引文

[1]王衔,陈涛,赵淇,等.DNV规范(2014)海上风机基础灌浆连接段抗弯性能设计理论研究[J].海洋工程,2016,34(3):140-150.Wang Xian,Chen Tao,Zhao Qi,et al.Design theory of bending capacity of grouted connections in offshore wind turbines foundation based on DNV specification(2014)[J].The Ocean Engineering,2016,34(3):140-150.(in Chinese)
    [2]Andersen M S,Petersen P M.Structural design of grouted connection in offshore steel monopile foundations[C].Global Windpower Conference.2004.
    [3]Fabian Wilke.Load bearing behaviour of grouted joints subjected to predominant bending[D].2014.
    [4]Lotsber G I.Structural mechanics for design of grouted connections in monopile wind turbine structures[J].Marine Structures,Elsevier Ltd,2013,32:113-135.
    [5]赵淇,陈涛,王衔,等.海上风机导管架支撑结构灌浆连接段数值分析[J].结构工程师,2016(5):59-64.Zhao Qi,Chen Tao,Wang Xian,et al.Numerical analysis of grouted connection in jacket support structures for offshore wind turbine[J].Structural Engineers,2016(5):59-64.(in Chinese)
    [6]陈涛,张持海,赵淇,等.海上风机基础灌浆连接段压弯性能试验研究[J].海洋工程,2017,35(3):112-118.Chen Tao,Zhang Chihai,Zhao Qi,et al.Experimental study on the compression-bending behavior of grouted connection in offshore wind turbine foundations[J].The Ocean Engineering,2017,35(3):112-118.(in Chinese)
    [7]聂建国,王宇航.ABAQUS中混凝土本构模型用于模拟结构静力行为的比较研究[J].工程力学,2013,30(4):59-67.Nie Jianguo,Wang Yuhang.Comparison study of constitutive model of concrete in ABAQUS for static analysis of structures[J].Engineering Mechanics,2013,30(4):59-67.(in Chinese)
    [8]CEB-FIP Model Code 1990:Design Code[M].London:Thomas Telford Services Ltd.,1993.
    [9]Schaumann P.Fatigue performance of grouted joints for offshore wind energy converters in deeper waters[C].The Twentieth International Offshore and Polar Engineering Conference.International Society of Offshore and Polar Engineers,2010,7:672-679.