基于整体安全度的高拱坝体形稳健优化设计

项目名称： 基于整体安全度的高拱坝体形稳健优化设计

项目编号： No.51279174

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 孙林松

作者单位： 扬州大学

项目金额： 80万元

中文摘要： 拱坝在具体实施过程中，实际地质条件、封拱条件等基本设计参数常与设计条件有一些差异，一个好的拱坝体形应当最大程度地降低这种因设计参数的波动而引起的坝体性能的变化，也就是具有较好的稳健性。因此，考虑拱坝设计条件中的不确定因素，开展拱坝体形稳健优化设计研究具有重要的理论意义与工程实际意义。本项目拟首先对拱坝整体安全度进行研究，提出精确高效的结构非线性分析方法，在深入分析拱坝极限平衡状态判据的基础上，建立拱坝整体安全度预测模型；根据高拱坝的特点，以拱坝整体安全度为主要性能指标，分析其对设计条件中不确定因素的敏感性，建立拱坝体形稳健优化设计模型并提出相应的有效解法，形成基于整体安全度的高拱坝体形稳健优化设计理论、方法和技术体系；编制计算机程序，结合白鹤滩拱坝等实际工程进行实例分析，提出具有工程应用价值的拱坝体形设计方案与设计建议。

中文关键词： 拱坝；稳健优化；超载系数；应变能；扩展有限元

英文摘要： In the practical construction process of arch dam, the actual basic parameters related to geological conditions and the joint grouting conditions are often different to design conditions. For a well-designed arch dam, its variation of performance caused by the change of design parameters should be reduced to the great extents, i.e., the arch dam should be robustness. So, it is very important in theory and engineering practice for arch dam shape optimization to consider dam robustness to design conditions. In this proposed project, the major research activities will include the following. First, the evaluation method of the global safety of arch dams will be studied. For this purpose, a precise and efficient method for structure analysis of arch dams should be proposed, and the criteria of limited state of arch dams with ultimate bearing capacity should also be researched intensively. Secondly, considering the characteristics of high arch dams, the global safety is taken as the performance index, and after the analysis of its sensitivity to uncertainty factors of the design conditions, robust optimization models for shape design of high arch dams based on the global safety degree will be established and some effective solution algorithms will also be proposed. Thirdly, on the basis of the researches above, c

英文关键词： arch dam；robust optimization；overload factor；strain energy；XFEM