EXPERIMENTAL STUDY ON THE STABLE BEARING CAPACITY OF VARIABLE CROSS-SECTION STEEL INCLINED COLUMNS OF A LONG-SPAN STRUCTURE
The exterior facade structure of the large-span building of Hangzhou Asian Games E-sports Stadium adopts a variable cross-section thin-walled box shaped inclined column steel frame system.In order to study the sta-ble bearing capacity of the steel inclined column with variable cross-section, the whole process loading test under vertical load is carried out on the 1∶4 inclined column scale model simulating the complex boundary, and the dis-placement and deformation development process, ultimate bearing capacity, and final failure form of the inclined col-umn are obtained. The results show that the steel inclined column first enters yield in the lower region with a smaller cross-section, and then cause the plastic buckling of the flange at the unfavorable cross-section with the increase of loads. This phenomenon gradually expands to the web, resulting in the formation of a plastic buckling hinge with sig-nificantly reduced bending resistance, which makes it fail due to excessive deformation. However, the column under-went sufficient plastic deformation at the buckling hinge before failure, indicating good ductility. The study may pro-vide the reference for design and engineering application of similar steel inclined columns.