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常规有限元法在单元的合理划分和混凝土面板受力变形的准确计算方面有较大困难,为此该文将无单元法应用于混凝土面板堆石坝的应力分析。在几何条件或应力变化比较强烈的区域使用无单元法,而几何条件或应力变化不太大的区域使用有限元法。计算结果表明:无单元法能够简单、灵活地对混凝土面板等薄层结构进行节点加密,能够避免有限元计算网格划分长宽比例过大的缺陷,从而可以改善计算精度;两种方法的耦合可以很好地发挥各自的优势。
The conventional finite element method has great difficulties in the reasonable division of elements and the accurate calculation of the stress and deformation of concrete slabs. Therefore, this paper applies the element-free method to the stress analysis of concrete faced rockfill dam. In the geometric conditions or changes in the area where stress is stronger using the elementless method, and the geometric conditions or stress changes in the area is not too large using the finite element method. The calculation results show that the element-free method can easily and flexibly node encryption of thin-walled structures, such as concrete slabs, and can avoid the defect that the aspect ratio of the finite element mesh is too large, so that the calculation accuracy can be improved. The coupling of the two methods Can play their respective advantages.