工字形软钢阻尼器装配单连梁结构的抗震性能研究OA

Herein,we propose a design scheme to address the issues related to the poor seismic per-formance and low construction efficiency of coupling beam connections in prefabricated concrete struc-tures.The proposed scheme employs metal dampers for the connection of precast shear walls and cou-pling beams.Using the ABAQUS finite element software,we investigated the mechanical perfor-mance of 24 structures with assembled single-coupling beams equipped with I-shaped mild steel damp-ers under low-cycle reciprocating loading.Specifically,we analyzed the effects of different parameters on the load-displacement(P-Δ)skeleton curves,stiffness degradation curves,and strength degrada-tion curves of the assembled single-coupling beam structures.The results showed that the grout strength and web thickness of an I-shaped mild steel damper slightly affect the P-Δ skeleton curves;the variation in bearing capacity does not exceed 10%.In contrast,the shear wall thickness and web height of the damper significantly affect the P-Δ skeleton curves;the bearing capacity variations exceed 40%and 15%,respectively.The web height and thickness of the mild steel damper and the grout strength considerably affect the initial stiffness of the coupling beam;however,their effect on stiffness degradation is minimal.The strength degradation curves generally exhibit an initial increase,followed by a gradual decrease.The proposed design scheme is applicable to engineering applications and meets the multifunctional coordination requirements of load-bearing,energy dissipation,and assembly of the structure.The design results can be used as a reference for the engineering application of prefabricated frame-shear wall structures.