Earthquake Response of a Displacement Ratio Overrun Eccentric Structure and Control Analysis Using Dampers

This paper research the earthquake response control effect of the displacement ratio overrun asymmetric structures by using viscous damper,viscoelastic damper, metal damper,lead-viscoelastic compound damper and brace.In this article,a practical project is used as analysis background.The model anlaysis,response spectrum analysis and time history analysis are proceeded for the structure with 4 different kinds of damper.The period ratio and displacement ratio are contrasted in the paper.Results show that after install the viscous-elastic damper,lead-viscoelastic compound damper and metal damper into the structure,the displacement ratio is reduced largly.The damper should be located at the end,where the lateral stiffness is weak and the displacement is large.Viscoelastic damper,metal damper and lead-viscoelastic compound damper adjust the torsional effect by supplying the asymmetric structure lateral stiffness and damping,while viscous damper increasing the damping ratio.Moreover,the viscous damper and viscouelastic damper have exellent energy dissipative abillity even under light earthquake,however,metal damper and lead-viscoelastic compound damper are basically in elastic state while only supply stiffness.It have great dissipative ability under rare earthquake.