The Analysis of Mechanical Behavior of Special Concentrically Braced Single-Story Frames With Ductile Casting Steel Connectors

Background: The special concentrically braced frame (SCBF) is an aseismic structure, but its bracing system exhibits brittle failure and premature buckling connected with the weld fracture of gusset plate post-buckling braces; thus, maximizing role energy dissipation difficult. Methods: Here, this paper proposes a single-story frames ductile casting steel connectors. large inelastic deformation mainly concentrated in connectors under earthquake, degree can be reduced. finite element model central support was established by ABAQUS. Monodirectional loading simulations were conducted on 12 groups specimens different parameters, then trend, stress distribution, initial stiffness, ductility analyzed. Results: seismic behavior evaluated variable parameters width-thickness ratio stiffener, length segment overstrength coefficient. connector conducts main that exhibit good stiffness. Conclusion: study results provided direct evidence performance closely associated coefficient axial force. Also, members independently controlled reasonably designing connector.