Research For Node Of CFT Column To Steel Beam With Bolted Double Split-tee Plate Connection

The composite structure is the only way for the development ofhigh-rise buildings, the construction and stress analysis of the node is themain content of the design,but the design specification of such node is notperfect yet. This study have a space finite element analysis on a new node ofthe CFT column and H-beam, research the stress distribution situation andinner force actuating mechanics of the node in the load, and the chief factorthat effect the mechanical properties of the node.Through analyzing10series of total30bolted double split-tee plateconnection samples by finite element and discussing the effects of thoseparameters to connection behaviors, it comes to the conclusion that the bolteddouble split-tee plate connection is semi-rigid and plastic deformability isgood; the height of beam section has very greatly influence on connectionbehaviors; the arrangement spacing S2of the high-strength bolt has greatinfluence on the ultimate bearing capacity; the thickness of H steel webs has great influence on connection behaviors; the thickness of T-stub flange, thethickness of T-stub web and the diameter of high-strength bolt has a certaininfluence on connection behaviors; the strength of concrete in pipe has greatinfluence on the initial stiffness of the connection, but has no influence on theultimate bearing capacity.Based on the result of finite element analysis, the theoretical calculationmethods of the ultimate bearing capacity to the bolted double split-tee plateconnection were established, to compare the result with finite elementcalculation result, the reliability of the formula was verified. Somesuggestions on the design of the bolted double split-tee plate connection weregiven.