非共面V-H-M复合加载模式下海上风电桶形基础破坏包络面特性研究  

FAILURE ENVELOPES OF BUCKET FOUNDATIONS FOR OFFSHORE WIND TURBINES UNDER COMBINED NON-PLANAR V-H-M LOADING

作　　者：李思琦 王媛 李庆文[1] 黄景琦 罗仑博 Li Siqi;Wang Yuan;Li Qingwen;Huang Jingqi;Luo Lunbo(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;College ofMechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]河海大学力学与材料学院,南京211100

出　　处：《太阳能学报》2021年第6期391-399,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目(51679060)。

摘　　要：相对于传统共面V-H-M复合加载模式,通过水平荷载H与弯矩荷载M间的夹角Φ_(H-M)考虑非共面V-H-M复合加载,该加载模式更加符合海上风电基础的实际受荷情况。研究表明随着Φ_(H-M)的减小,桶形基础H-M破坏包络线在第一象限显著向内收缩,第二象限逐渐向外扩张,最终呈现出对称性,由Φ_(H-M)产生的对于桶形基础复合承载力的降低不容忽视。基于计算结果,提出用于确定桶形基础共面及非共面V-H-M复合加载模式下破坏包络面的方程,明确了Φ_(H-M)对于基础复合承载力的影响,并通过实例展示了方程及破坏包络面理论的应用。Compared with the traditional combined planar V-H-M loading,the non-planar V-H-M loading which is more accordant with the actual loading condition of foundations for offshore wind turbines is considered by theΦ_(H-M)(angle between the horizontal load H and the moment M).The results show that with the decrease ofΦ_(H-M),the H-M failure envelope of bucket foundation shrinks remarkably in the first quadrant and expands gradually in the second quadrant,and finally presents symmetry.The reduction of combined bearing capacity of bucket foundation due to theΦ_(H-M)cannot be neglected.Based on the results,expressions which can determine the failure envelopes of bucket foundation under combined planar and non-planar V-H-M loading are proposed and the effect ofΦ_(H-M)on the combined bearing capacity is clarified.An example is given to present the applications of the expressions and the failure envelope theory.

关 键 词：海上风电 桶形基础 承载力 复合加载 破坏包络面 非共面V-H-M 

分 类 号：TU476[建筑科学—结构工程] P752[建筑科学—土工工程] TM614[天文地球—海洋科学]