The Seismic Performance Study on Composite Concrete-Filled Steel Tube Column-Steel Beam Node

Based on the external stiffening ring node, a kind of node form of composite concrete-filled steel tube column-steel beam node with cover plate type external stiffening ring was proposed. Using the finite element software ABAQUS, 1 ordinary external stiffening ring node and 8 new cover plate type external stiffening ring column-steel beam nodes were established for low cycle repeated loading. The influence of axial compression ratio and column ring diameter-thickness ratio on the seismic performance of the nodes was studied through comparison and study of variation parameters. According to the results, the new composite concrete-filled column-steel beam node with cover plate type external stiffening ring has better seismic performance than the ordinary external stiffening ring nodes, and effectively avoids the stress concentration in the contact part between the external stiffening ring and the composite concrete-filled steel tube column. Besides, it has good seismic performance in the range of reasonable axial compression ratio and diameter-thickness ratio of column ring. Thus, it is more suitable for engineering design and application.