The Research Of Bearing Capacity About Cold-formed Box Column To H-beam Connection Joints

It is carried on our research in this field from the multi-resident steel structure knot of beam-column research, there are various of knot style including top- and seat- angle steel, top- and seat- angle with double web-angle steel connections, extended-end-plate bolted connections and so on . Some connections, such as I beam - H column connection, H beam- H column connection have been widely analyzed by many researchers, while the character of square cold-forming steel column -H beam connection has been seldom researched. There is great difference for stiffeners in the two main axial directions of H-type steel section, and it exists weak axis, so it is not economic to be made of the column. Considering the modulus of elasticity of square cold-forming steel column section. The stiffeners are same in the two main axial directions of square steel column which is fit for frame column because the steel which is used will be much saving. This article will provide the study to the square cold -forming steel column and H-type steel beam connections: 1.The tensile and shear capacity of new single direction bolts was examined by experiments, then the experimental phenomenon and destroyed mechanism was analyzed, and the data about the bearing capacity of bolts was gained.2.Based on the elastic mechanics and plastic mechanics, by establishing the nonlinear analytical model of square cold-forming steel column and H beam connection with nonlinear finite element method software ANASYS, the behavior of beam-column connections in the single static load was stimulated and analyzed.3.The extended-end-plate bolted connections was analyzed with FEA software, obtaining the P-A curve of all specimens and the stress distributing situation of specimens when they were in the plastic transmutation. In accordance with the calculation consequence, the influence of the end plate s thickness, the members' dimension and so on to the connection capacity was analyzed.In the end, the content of this paper has been summarized and some problems, which need further study have been proposed.