钢筋粘结滑移的拉拔有限元模拟，求解
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钢筋选用T2D3（truss）单元,钢筋网选用embeded形式，受拉钢筋与混凝土接触选用弹簧单元，为什么运行结果出现如下错误，该如何解决？？？？？？？？
The nodes for element 1 (assembly) are coincident. The line-of-action can not be determined
The nodes for element 1 (assembly) are coincident. The line-of-action can not be determined
ecroga 
