混合线型拱坝的优化设计

Optimizing Design of Arch Dam with Mixed-Type Arch Model

拱坝的混合线型是以曲车半径方程描述的统一的拱圈线型．通过改变曲率方程中的参数，能很好地适应坝体各个部位不同的地形地质条件和受力特点，并实现不同拱圈线型间的平滑过渡．本文阐述了混合线型拱圈的模型，并以2座工程实例，说明了混合线型拱圈与常规体型模式相比具有很强的竞争优势．混合线型拱坝优化设计是“拱坝新型体型优化和全过程分析的研究与应用”的重要组成部分．后者荣获1998年度国家科技进步三等奖．

A new form of arch──mixed-type arch model is practiced in shape optimization of arch dam.Mixed-type arch is defined by a unified equation of curvature radius. Instead of conventional single arch type inone arch dam, the new model involves various arch types in the different parts of an arch dam. By means ofshape optimization, the suitable arch types can be obtained due to the particular topography and geology conditions for the different parts of dam body. Two practical examples are given to show the potential and effciencyof the new model.