堤防结构“自适应”混凝土衬砌数值模拟

针对堤防混凝土衬砌在外部荷载(水压力、浪压力以及其他荷载)发生破坏且其破坏位置主要发生在衬砌底部1/3处的问题,进行了对比分析研究,提出一种"自适应"的混凝土衬砌方式。采用有限元软件ADINA模拟在衬砌受力最大部位设置填充缝及填充柔性材料等方式削减应力,从而达到衬砌自身适应外部荷载变形的作用。结果表明:"自适应"衬砌方式不仅可以有效减小堤防的应力、应变,而且是一种实用简单可行的方法。

Numerical simulation for adaptive embankment structure concrete lining

For the damage of embankment concrete lining under external load (water pressure,wave pressure and other load)occurs mainly in the bottom 1/3 of lining,this paper carries on a comparative analysis of the concrete lining,and proposes an adaptive concrete lining.Using finite element software ADINA,this paper simulates reducing stress by setting filler seam in the maximum of the lining and packing flexible material in the seam so that the lining can adapt itself to the external load of lining deformation.The result shows:the adaptive lining can not only effectively reduce the dike embankment stress and strain,but also it is practical and simple.