Research on Mechanical Properties of Prefabricated Z-Shaped Steel Beam-to-Column Connections
The experiments under monotonic and cyclic loading conditions and simulation were conducted to investigate the mechanical properties of prefabricated Z-shaped steel beam-to-column connections.The rota-tional stiffness,failure mode,bearing capacity,hysteretic performance,energy dissipation,and stiffness deg-radation of Z-shaped connections with different designed strengths were studied respectively.The results showed that the prefabricated Z-shaped steel beam-to-column connections showed good ductility and could a-chieve plastic hinge movement outside the panel zone.The designed strength showed a significant effect on the hysteretic performance and plastic bending resistance of Z-shaped connections.The small value of designed strength parameter(0.2-0.9)made that the failure mode of Z-shaped connections was premature damage of bolts.The anti-slip and ultimate bearing capacity of Z-shaped connections increased linearly with the increase of designed strength,and the rotational performance of Z-shaped connections was semi-rigid.In case of the large value of designed strength parameter(0.9-1.3),anti-slip and ultimate bearing capacity of Z-shaped con-nections were almost unchanged.The failure mode was changed to premature damage of connected members,and the rotational performance of Z-shaped connections was rigid.In addition,the number of bolts required by the proposed Z-shaped connections was relatively small,and the installation was efficient and economical,which could contribute to engineering application.
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