求助：外加强环钢管混凝土柱-梁节点，梁和钢管怎么连接
做一个外加强环钢管混凝土柱-混凝土梁节点模拟，可是不太清楚梁和钢管怎么连接。我的钢管是shell，混凝土梁是实体，刚开始我用的是interaction中的surface-to-surface 定义摩擦连接，运行之后，出现的错误是The element based surface assembly_tube-beam has a mixture of 3d shell edges and other types of underlying elements. If a surface has any 3d shell edges then all of its facets must be 3d shell edges.
The slave surface assembly_tube-beam does not exist.
The slave surface assembly_tube-beam does not exist.
我觉得是shell和实体不能连接才会造成这样的情况，是不是因为我把钢管和加强环用group以后才出现的问题？希望各位大大能帮我看看
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