Study on mechanical behavior of large eccentricity beam-column joints in a super high-rise apartment building
Taking the typical large eccentric beam-column joints by side alignment in a super high-rise apartment building as the example,mechanical behavior of eccentric beam-column joints under reversed low-cyclic loading was simulated by ABAQUS finite element software,the influence of additional torque caused by beam-column eccentricity on the shear bearing capacity of core joint area was discussed.Based on the finite element analysis results,the effective width formula of large eccentric beam-column joints by side alignment was proposed and applied to a specific project.The results show that the shear bearing capacity of core joint area obtained by the effective width formula proposed is basically consistent with the finite element calculation result.Aiming at T-shaped beam-column joints in the project,the influence of additional bending moment caused by beam-column eccentricity on bending moment of column end was quantitatively analyzed.The results show that the additional bending moment can reduce the bending moment of the column end by about 50％under vertical load,and increase the bending moment of the column end by about 86％under earthquake.
large eccentric beam-column jointeffective width of jointshear bearing capacitynumerical analysis
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