ANALYSIS OF THE LIMIT BEARING CAPACITY AND SEISMIC PERFORMANCE OF TYPICAL JOINT OF TRUSS-BEAM AND COLUMN IN FABRICATED HIGH-RISE STEEL STRUCTURE

Welded joints，bolted joints，bolted and welded joints are the typical joints in fabricated high-rise steel structure． The paper established three models of the joints of truss-beam and column for nonlinear analysis using the finite element software ABAQUS，it was got that the failure mechanism， the limit bearing capacity and the energy dissipation capacity that was the one in the function of monotonic cyclic load． The results show that the limit bearing capacity of the welded joint is the highest，but the plastic deformation mainly appears in joint region， so it dissatisfies the seismic request． The slip occurs easily in frictional regions for the bolted joint in the function of monotonic cyclic load． The out-of-plane buckling of the overall truss-beam in bolted and welded joint occurs due to the different stiffness of the two sections of the single beam-truss． So the limit bearing capacity of this joint is the lowest． It was proposed that some suggestions on the design of three typical joints of truss-beam and column in fabricated high-rise steel structure．