Study On Failure Modes And Energy-consumption Performance Of Damper-reinforced Composite Coupling Beams

Coupling beams need to meet requirements of stiffness and have enoughenergy dissipation capacity for seismic design of high-rise building structure. Forthe issues on more complex and less applicability of traditional coupling beamsimprovements, to improve the energy dissipation capacity of coupling beamsbetter，a new type of embedded damper-reinforced composite coupling beams wasproposedDue to the prerequisite for design of coupling beams energy dissipation is toachieve a reasonable failure mode, the failure modes and energy dissipationperformance will produce changes which affected by both collaborative workafter steel dampers are embedded into concrete, therefore, this paper studies onthe mechanism for collaborative work of composite coupling beams further on thebasis of preliminary, through the change of bond forms, research the impact onfailure mechanisms, energy dissipation performance and overall structuralseismic performance of damper-reinforced composite coupling beams, as follows:Study on failure modes of damper-reinforced composite coupling beamsbased on bonded forms. This paper assumes four bonded composite couplingbased on the bonded zone of damper and concrete. The influence on compositecoupling beams studied in-depth with the changes of bonded forms, span-depthratio and embedded zone, defined failure modes and collaborative workmechanism of different forms composite coupling beams under same span-depthratio, the most reasonable bonded zone was obtained by comparing to the energydistribution of each bonded damper.The performance analysis of different bonded composite coupling beams.The superiority of coupling beam which the damper opening area and concretedoes not bond through numerically analyzing energy performance was verified.Carrying capacity design formula of composite coupling beams was proposedcombining with the specification of steel concrete coupling beams.The performance analysis of structure with damper-reinforced compositecoupling beams. With engineering examples, implement the dynamicelastic-plastic analysis for high-rise buildings with damper-reinforced compositecoupling beams, The contribution and impact on the entire structure of differentbonded composite coupling beams was obtained by comparison story drift, baseshear, beam energy, etc. Finally, The validity of seismic energy dissipation ofoptimal bonded composite coupling was verified.