Finite element analysis of the seismic performance of coupled steel silo composite shear walls with different coupling ratios
The coupling ratio is a crucial factor that affects the seismic performance of coupled shear wall structures.To investigate the seismic performance and failure characteristics of the novel steel silo composite shear wall under a coupling system,and to determine the ap-propriate range of coupling ratios for designing,10 finite element analysis models of coupled steel silo composite shear walls with varying coupling ratios were established through ABAQUS software.Monotonic pushover and cyclic reciprocal loading were then conducted.The results indicate significant variations in the seismic performance and failure characteris-tics of coupled steel silo composite shear walls with different coupling ratios.With a critical-ly low coupling ratio,the steel coupling beams sustain premature failure,thereby leading to the failure of the coupling system;with an excessively high coupling ratio,composite wall piers are prone to an early failure when the steel coupling beams exhibit inadequate energy dissipation.Therefore,it is recommended that the plastic coupling ratio be restricted to a range of 45%to 50%.Additionally,the ratio of plastic coupling ratio to elastic coupling ra-tio should not exceed 90%to ensure that steel coupling beams yield in advance of combined wall piers,so as to improve the seismic performance of the structure.
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