司政;李成宇;张倩;吕琦;

• 1:西安理工大学水利水电学院
• 2:四川省水利水电勘测设计研究院
• 3:中国电建集团西北勘测设计研究院有限公司

摘要(Abstract)：

为解决对拉式锚固竖井预应力闸墩应力集中问题，对锚固竖井尺寸进行优化，以降低锚固竖井周边拉应力。以某工程对拉式锚固竖井预应力中墩为研究对象，采用三维有限元法建立预应力闸墩整体模型进行计算分析，并从整体模型中切割出锚固竖井子模型，切割边界上施加整体模型计算得到位移值，从整体模型与子模型应力计算结果可知，切割边界上应力基本相同，验证了子模型法的合理性。在此基础上，基于ANSYS优化模块零阶优化算法对锚固竖井尺寸进行优化，采用优化后的尺寸进行应力变形计算时，正常和检修2种工况下Z向最大拉应力均降低了1.1 MPa；应力集中区正常运行工况下Y向拉应力及检修工况Z向拉应力分别减小了1.0、0.7 MPa；锚固竖井顶面X、Z向拉应力区明显减小。运用子模型法和尺寸优化技术对预应力闸墩锚固竖井进行优化，可有效降低锚固竖井周边拉应力及拉应力区范围，可为工程设计提供技术支撑。

关键词(KeyWords)： 预应力闸墩;锚固竖井;子模型;切割边界;尺寸优化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（编号：51879217,51409207）;; 中国博士后科学基金项目（编号：2015M582765XB）

作者(Authors): 司政;李成宇;张倩;吕琦;

DOI: 10.14188/j.1671-8844.2023-02-009

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