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复杂空间相贯节点广泛应用于大型空间结构中,目前规范尚无正确完善公式计算其承载力。为研究这类复杂空间相贯节点的受力性能和提出合理的构造改进措施,根据某实际工程,选择同时承受较大轴力和弯矩的XX形空间相贯节点进行有限元分析,并提出5种改进措施来改善节点的力学性态。分析结果表明,增加首先“破坏”支管的壁厚不能显著提高极限承载力;支管与主管汇交处设置加劲肋可以改善节点域的应力分布;在靠近节点域的支管内设置加强板可提高节点极限承载力;支管与主管之间交汇处设置贯穿加劲肋可显著减小主管的变形。
Complicated spatial coherence nodes are widely used in large-scale space structures. At present, there is no correct formula for calculating their bearing capacity in the current norms. In order to study the mechanical behavior of such coherent nodes in complex space and to propose reasonable structural improvement measures, according to a practical project, the finite element analysis of XX-shaped space coherent nodes which can withstand large axial forces and bending moments simultaneously is proposed. Five kinds of improvement measures to improve the mechanical behavior of the joints. The analysis results show that increasing the wall thickness of the first “broken” branch pipe can not increase the ultimate bearing capacity remarkably; setting the stiffener at the junction of the branch pipe and the main pipe can improve the stress distribution in the node area; and providing the reinforcing plate in the branch pipe near the node area Increase the ultimate bearing capacity of the node; the setting of the junction between the branch pipe and the main pipe through the stiffener can significantly reduce the deformation of the main pipe.