风电塔架空心锥体基础承载机理数值分析  

Numerical analysis of load-bearing mechanism of hollow cone foundation for wind turbines

作　　者：邢国起[1] 李大勇 李珊珊 XING Guo-qi;LI Da-yong;LI Shan-shan(College of Architecture and Civil Engineering,Weifang University,Weifang 261061,China;College of Architecture and Civil Engineering,Weifang University,Weifang 261061,China;College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]潍坊学院建筑工程学院,山东潍坊261061 [2]福州大学土木工程学院,福建福州350116 [3]山东科技大学土木工程与建筑学院,山东青岛266590

出　　处：《广西大学学报（自然科学版）》2018年第4期1517-1526,共10页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51379118);山东省高等学校科技计划项目(J17KB059)

摘　　要：通过有限元数值模拟方法,研究了在外荷载分量作用下风电塔架空心锥体基础的承载特性和破坏机理,对比分析了不同径高比下基础的竖向、水平和弯矩极限承载力,并与传统重力式基础承载力进行比较。结果表明:与传统的风机重力式基础相比,空心锥体基础的竖向极限承载力、水平极限承载力及弯矩极限承载力分别提高472.4%、34.9%及193.3%;极限状态时空心锥体基础地基的破坏机理也与传统重力式基础存在着不同;随着径高比的增大,空心锥体基础竖向极限承载力与水平极限承载力呈逐渐增大的趋势,而弯矩极限承载力则表现出了先增大后减小的趋势。Compared with conventional onshore wind turbine concrete foundation,load-bearing characteristics and failure mechanism of a novel foundation for wind turbine was studied under external load based on the finite element method.And the models with different aspect ratios were built to investigate the influence of aspect ratio on the load-carrying capacity of the hollow cone foundation for wind turbine.The influence of aspect ratio on the vertical ultimate bearing capacity,horizontal ultimate bearing capacity and ultimate bending moment were analyzed.The results show that,compared with those of the conventional onshore wind turbine concrete foundation,the vertical ultimate bearing capacity,horizontal ultimate bearing capacity and ultimate bending moment of the hollow cone foundation are increased by 472.4%,34.9%and 193.3%,respectively.Failure mechanism of the hollow cone foundation for wind turbine is also different from that of the conventional onshore wind turbine concrete foundation at the limit state.With the increase of aspect ratio,the vertical ultimate bearing capacity and horizontal ultimate bearing capacity gradually increases,and the ultimate bending moment gradually increases firstly and then decreases.

关 键 词：空心锥体基础 承载特性 破坏机理 径高比 有限元法 

分 类 号：TU441[建筑科学—岩土工程]