基于ABAQUS对风机基础加固前后应力与损伤分析Stress and damage analysis of wind turbine foundation reinforcement based on ABAQUS
胡良明,刘志鹏,曾宇,黄昊
摘要(Abstract)：
针对风机基础加固后是否能有效降低承台应力水平,在极端荷载工况下是否出现损伤破坏等问题,以华东某49.8 MW风电场项目为例,利用ABAQUS及混凝土损伤塑性理论建立了风机基础加固前后数值模型,并对钢筋及混凝土的应力与损伤进行了计算分析。结果表明,加固前台柱部分基础环外侧混凝土的损伤较为严重,承受拉、压应力的能力较低;加固后混凝土承台最大拉、压应力显著降低,加固体与基础环上部接触的部位几乎没有产生损伤。通过加植竖向、径向等钢筋和加大台柱截面等措施可以在一定程度上增强承台整体结构承载能力,嵌固板环梁式加固法可使基础满足更高风力标准,增大整体基础支撑系统重力,提高其稳定安全性。该成果不仅对预估风机基础结构的安全性评价具有重要意义,而且对同类工程设计和施工具有一定的参考价值。
关键词(KeyWords)： 风机基础;应力;损伤;加固体;ABAQUS
基金项目(Foundation): 国家自然科学基金青年科学基金项目(51609217)
作者(Author): 胡良明,刘志鹏,曾宇,黄昊
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