面板堆石坝中接触面静力数值模型计算参数研究

Study on the calculating parameter of the static numerical model on the contact surface of CFRD

土与结构接触面受力、变形等问题一直是水利、土木领域的重难点问题之一,是更好更合理的解决土与结构相互作用的前提。在现有的计算模型中为了更好的模拟面板堆石坝中面板与堆石体之间的接触,本文通过静力数值模型研究了无厚度goodman接触面单元的法向和切向刚度的合理取值范围。结论认为无厚度good鄄man接触面单元的法向刚度取值为相邻材料弹模的50—100倍,计算模型法向刚度与初始切向刚度的关系取Kn=2.5Ks.时可以更好的反应土与结构两者的受力及变形协调问题。

The stressed and deformed interface between soil and structure has always been one of the difficulties in water conservancy and construction field.In order to better simulate the surface contact between con- crete face and rockfill,this paper studied on the rational value range of normal and tangential rigidity of the zero-thickness goodman surface unit ,based on static numerical model.The result shows that the normal rigidity of the zero-thickness goodman surface unit is 50 to 100 times higher than other materials.It shows that when normal rigidity and initial tangential rigidity turns to be Kn=2.5Ks,the interaction between soil and structure will be better shown.