复合加载模式下海上风机桩基础破坏机制研究  

Study of Failure Patterns of Monopile Foundation for Offshore Wind Turbines under Combined Loading

作　　者：王俊岭[1] 闫澍旺[1] 霍知亮[1] 

机构地区：[1]天津大学建筑工程学院,天津市300072

出　　处：《勘察科学技术》2013年第1期1-4,共4页Site Investigation Science and Technology

摘　　要：利用有限元数值分析软件对复合加载模式下海上风机桩基础破坏机制进行了详细地研究,确定了竖向荷载V、水平荷载H和力矩荷载M共同作用下桩基础的破坏模式及在荷载空间(V,H,M)中的破坏包络面。采用固定位移比加载方法对桩基础在V-H、V-M、H-M荷载平面内的破坏模式分别进行了三维有限元分析研究,分析得到海上风机桩基础在不同荷载分量组合条件下的失稳破坏机制和V-H-M荷载空间内的破坏包络面。由此可根据破坏包络面与实际桩基受力状态之间的相对关系,评价实际荷载状态下海上风力发电机桩基础的稳定性。The failure patterns of monopile foundation for offshore wind turbines under combined loading are studied by virtue of finite element numerical simulation software in detail, and the failure envelopes and failure mechanisms of monopile foundation under combined loading in the design of offshore wind tur- bines which are usually subjected to vertical load V, horizontal load H and moment component M simuha- neously. Based on fixed displacement ratio loading method, three dimensional finite element numerical analyses are conducted to explore the failure mechanisms of monopole in different loading planes, such as V-H, V-M, H-M. The failure patterns of monopile foundation for offshore wind turbines under vari- ous combinations of load components and the failure envelopes in different loading spaces are obtained. According to the relationship between the computed failure envelopes and the actual combined loading, the stability of monopile foundation for offshore wind turbines could be evaluated.

关 键 词：海上风力发电机 桩基础 破坏模式 破坏包络面 复合加载 

分 类 号：TU473.1[建筑科学—结构工程]