STUDY ON MECHANICAL PROPERTIES OF JOINTS CONNECTING H-SHAPED STEEL BEAM AND RECTANGULAR STEEL TUBE COLUMN WITH A NEW-TYPE DIAPHRAGM

For the problems of residential steel structure buildings that steel members protrude from the wall surface and the building decoration at the joint is difficult, based on the actual engineering, the paper proposed a new type of diaphragm-through steel beam-column joint. According to the current specifications, five joints models were established by the finite element analysis software ABAQUS. The elastoplastic contrast analysis of the new joint and traditional diaphragm-through joint was carried out under cyclic loads. The mechanical properties of the joints in the major and secondary axial direction were analyzed. The research showed that the ductility, stiffness and energy consumption of the new joint were basically the same as those of the common joint; the plasticity development law of the new joint was different from that of the common joint, mainly reflected in the panel zone and the diaphragm; when connected to the secondary axis of the rectangular steel tube column, the shear deformation of panel zone should be paid enough attention, and its influence should be considered in the calculation of structural deformation. It was recommended to make a strong panel zone design when using new joint, and increase the thickness of new-type diaphragm.