PUSHOVER ANALYSIS OF PREFABRICATED STEEL FRAME STRUCTURE WITH INCLINED SUPPORT JOINTS

For studying the aseismic performance of the prefabricated steel frame with inclined support joints，the Pushover analysis was applied on one 30-story prefabricated steel frame and compared with analysis results of the frame without inclined support． Analysis result showed that under 7-degree rare earthquake，the maximum drift was 1 /223，which was less than 1 /50 specified by the code，hence this building structure could meet the principle ofno collapse under seldom earthquake actionin the national seismic design code; the arrangement of inclined support could reduce the deformation of the structure under severe earthquake，and the top displacement and the maximum drift of the structure were reduced by 33. 4% ～ 38. 1% and 19. 3% ～ 40. 1% respectively． Most of plastic hinges occurred on positions of web members of the truss girder，and frame columns were in elastic stage．