【摘要】 面板坝结构尺寸相差悬殊,高效的精细化分析手段是面板坝抗震研究的重要工具。结合非线性比例边界多边形单元法和高效的四分树离散技术,进行了面板坝高效精细化分析应用研究。采用比例边界多边形单元法和传统有限元法,对相同面板坝模型进行静动力及永久变形分析;结合四分树离散技术,进行了典型面板坝结构的高效跨尺度精细化分析应用。结果表明:计算结果分布合理,两种方法吻合度高,比例边界多边形有限元可与传统有限元一样便捷地进行大坝全过程数值分析计算;比例边界有限元可与传统有限元不能直接求解的四分树技术实现无缝耦合,进行高效的跨尺度精细化分析应用,且可快速完成分析模型重建,大幅改善了分析效率,可为结构局部损伤演化、渐进破坏研究提供技术支撑。更多还原

【Abstract】 Concrete face rockfill dams vary in structural dimensions.Efficient and refined analysis methods are important tools in seismic research of the face-slab dams.In this paper,via combining the non-linear scaled boundary polygon element method with efficient quadtree discretization technology,the application of high-performance refined analysis of the concrete face dam is investigated.Firstly,the static and dynamic analysis and permanent deformation calculation of the same face-slab dam model are carried out by using the scaled boundary polygon element method and the traditional finite element method.Subsequently,combined with the quadtree discretization technology,the high-efficiency cross-scale fine analysis of typical face-slab dam structures is applied.The computation results indicate that:(1)the two methods are in good agreement,indicating that the scaled boundary polygon finite element method is an effective tool in the analysis of the dam.(2)The scaled boundary finite element method can be seamlessly coupled with quadtree technology for efficient cross-scale fine analysis applications,and is efficiently in the reconstruction of analysis model,which greatly improve the analysis efficiency.Thus it is concluded that this method can provide technical support for study of local damage evolution and progressive damage of structures.更多还原