节点域对无横向加劲肋节点延性的影响

Effect of pane zone strength on ductility capacity of welded beam-to-column connections without continuity plates

抗弯框架焊接节点的节点域刚度影响节点的应力应变分布,因此对节点延性具有重要影响。通常认为,节点域的屈服有助于节点的延性性能,但是过大的节点域变形同样易于导致节点开裂,降低延性。这一结论是根据设置柱横向加劲肋的T形节点的理论分析和试验研究得出的。本文通过对节点进行三维非线性有限元分析,研究了节点域刚度对无横向加劲肋的节点延性的影响,分析结果表明较强的节点域对无横向加劲肋的节点延性有利。

Panel zone strength in welded moment -resisting- frame connections have a significant effect on the stress and strain distribution in the connection and consequently on connection perform- ance. It is generally believed that panel zone yielding is a yield mechanism that contributes to ductili- ty of moment frame connections, but connections with excessive panel zone deformation may have pre- mature connection fracture and reduced ductility. The conclusion was drawn based on the theoretic a- nalysis and tests on T - shaped connections with continuity plates, effect of panel zone strength on ductility capacity of welded beam - to - column connections without continuity plates were investigated through three - dimensional, nonlinear, finite - element analyses of connection subassemblies, results show that strong panel zone contributes to ductile performance of connections without continuity plates.