概述实际的刚架结构,为了保证在结点处的刚性,一般要在结点处设置加强板,例如图一所示刚架,这样在刚架中就会有图二所示的杆件出现。在利用有限单元法解算此类刚架时,如果用一般通行的空间杆件或平面杆件单元刚度矩阵来计算图二(a)、(b)两种杆件的话,显然会产生一定的偏差,原因是: Overview of the actual rigid frame structure, in order to ensure the rigidity at the junction, the reinforcement plate is generally set at the node, such as the rigid frame shown in Figure 1, so that in the rigid frame there will be the rod shown in Figure 2 . When using finite element method to solve this type of rigid frame, if we use the general spatial bar or flat bar element stiffness matrix to calculate the two bars of Figure 2 (a) and (b), it will obviously produce certain Deviation, the reason is: