I_Beam to Box_Column Rigid Connection without Internal Continuity Plate For Column-Tree Construction

In construction of steel structure in IRAN، as large wide flange I shaped sections are not available، box shaped columns are widely used. However connection of I beam to box shaped column and inserting the continuity plate inside box section to make a rigid connection is difficult in practice. In this paper a new geometry suitable for Column-Tree construction is introduced in which a rigid connection may be obtained without using internal continuity plate. For evaluation seismic performance of the connection، finite element modeling is used and a cross shaped substructure is analyzed subjected to monotonic and cyclic loading. The results show proposed connection meets the rigidity، ductility and strength criteria of AISC standard. This connection tolerates the cyclic loading up to 4% drift angle without significant loss of strength. In this analysis equivalent plastic strain criterion is used to monitor fracture initiation in critical regions of the connection