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用ANSYS有限元分析方法分析了树状结构二分叉铸钢节点在两类弯矩(节点核心区受压或受拉)分别作用下的几何因素对抗弯极限承载力的影响,并在此基础上拟合出该类节点抗弯极限承载力计算式。分析结果表明:在两类弯矩分别作用下,当节点几何尺寸相同时,节点抗弯极限承载力相差不大;主、分管之间夹角,主、分管之间倒角半径,分管之间外壁倒角半径,分管之间内壁倒角半径对节点抗弯极限承载力影响不大;主管径厚比对节点抗弯极限承载力影响较大;随分管与主管外径比增大,节点承载力近似线性增大;随分管与主管壁厚比的增大,节点抗弯极限承载力近似线性增大。
The ANSYS finite element analysis method is used to analyze the influence of the geometric factors of two bifurcated cast steel nodes of tree structure on the ultimate bearing capacity under the action of two types of bending moment (compression or tension in the node core region) Based on the fitting of the ultimate bearing capacity of such nodes formula. The analysis results show that under the action of two types of bending moment respectively, the ultimate bearing capacity of the joints is not different when the joint geometrical dimensions are the same; the included angle between the main and the branch, the chamfer radius between the main and the branch, The radius of chamfering of the outer wall and the radius of chamfering of the inner wall have no significant effect on the ultimate bearing capacity of the joints. The ratio of main diameter to thickness has a greater influence on the ultimate bearing capacity of the joints. The force increases approximately linearly. With the increase of the ratio of pipe to wall thickness, the ultimate bearing capacity of the joint increases approximately linearly.