Design And Vibration Absorption Of Multi-functional Damper

Earthquake as a natural disaster that seriously damages the safety of human life and property has always been the key target of human beings.Over the years,scientific researchers in various countries have carried out systematic research on earthquakes,and proposed various structural seismic design methods in the engineering field,which greatly reduced the loss of life and property caused by earthquakes.However,under the action of earthquakes,although some buildings have not completely destroyed and collapsed,their main functions have been destroyed and they cannot be used anymore.They can only be rebuilt.Or,some buildings can be put into use after being repaired,but due to the longtime of repair,it will seriously affect people's normal life.Therefore,the recoverability of structural functions under earthquakes will be particularly important.At present,in order to realize the recoverable function of the structure,some additional devices can be set in the structure to mitigate the effects of the earthquake.These attachments can be quickly restored by shock replacement after a shock,or the structure can be restored to its original state by the resilience of the attachment itself.These attachments are often mounted in the form of dampers,providing energy absorbing and shock recovery functions.Based on the above theory,this paper designs new friction and lead shear type multi-functional dampers,which improves the energy dissipation and recovery performance of the structure.The main contents of this article are as follows:(1)Introduce the structural design of two multifunctional dampers,determine the theoretical model according to the working principle of the damper,and select the appropriate mechanical parameters to describe the theoretical model.The experimental and numerical simulations of the components corresponding to the mechanical parameters in the theoretical model are carried out to study the mechanical properties of the components in the damper,which provides a basis for the establishment of the damper theoretical model.(2)Experiment on two kinds of dampers,and explore the influence of factors such as strain amplitude and load speed on the performance of the damper,and simulate the damper's restoring force model by combining the mechanical parameters of each component,and compare it by experiment and numerical simulation.Verify the correctness of the damper restoring force model and lay the foundation for the seismic performance analysis of the next damper.(3)Using the SIMULINK toolbox to establish the layer shear model of the frame structure,and perform elastoplastic time-history analysis on the structureswith different working conditions with or without friction type multi-functional dampers,and compare the seismic response of the top displacement of the structure.The influence of the damper and its arrangement on the seismic performance of the structure is studied,and the effect of the damper on reducing the seismic action is verified.