Study On Joint Rigidity Effects Of Staggered Truss Frame System Under Static Load

Since staggered truss structure system was developed, it has been widely studied and used for its economy and high efficiency. In China, the study on staggered truss structure system started relatively late. According to research result, there are less research on truss and column joints rigidity effects of staggered truss frame system static behavior. For the purpose of enrich existing research, the paper analysis static behavior、analysis approaches、second-order effect. Study on joint rigidity effects of staggered truss structure system’s mechanical behavior and deformation performance will guide in engineering application.In this paper, models of staggered truss system were established to analysis truss and column joints rigidity effects of staggered truss frame system static behavior. The major content of this paper are analysis of carrying capacity and structual displacement of staggered truss frame system with different type of truss column joints under static loads、analysis of second-order effect under different type of truss column joints in staggered truss frame system according to design code for steel structures.The analysis shows that truss and column joint rigidity improve the structural stiffness and structure loading capacity of staggered truss frame system. It is suggested to use rigid connection staggered truss frame system static behavior in engineering practice. Data shows that weak story often shows in lower parts of the structure. It is suggested to strength the trusses in the these parts of staggered truss frame system. The regulation of second-order effect in design code for steel structures is not proper according to the effects on displacement and stress.