Seismic Performance Analysis Of Multi-story Suspended Floors System Based On Matlab Numerical Model

In order to further improve the seismic performance of building structures and reduce the possibility of loss life and property caused by earthquake disasters,this research group has conducted new energy consumption such as self-centering variable friction energy dissipation brace,replaceable coupling beams and self-centering energy-consuming swing columns research on the mechanical properties of components and analysis of seismic performance parameters.Based on this,we consider trying to apply a new type of structural system to study and improve the seismic performance of the structure at the structural level.To this end,the research team designed a new multi-story suspended floors system.The biggest difference from the previous suspended structure system proposed by scholars is that in order to prevent damage of beam-column joints,this system only retained the uninterrupted connection between rooftop beams and columns,and set suspended floor's suspension points on columns.The main research contents of this system include the following aspects:?1?Describes the structure of the multi-story suspended floors system and its simplified analysis model.The Lagrange equation is used to establish the equation of motion of the multi-story suspended floors system.Observing the equation of motion,hangar rod length,mass of the suspended floor and the damping and stiffness provided by cushioning device are the main parameters that affect the dynamic response of the structural system;?2?Formulating programs to express equations with the help of Matlab platform,comparing Wilson-seta method,Newmark-beta method,Runge-Kutta method and other numerical analysis methods,and comparing and verifying the results obtained by various methods through calculation examples.Finally,it was decided to use the Newmark-beta method to solve the seismic dynamic responses of this system and perform dynamic time history analysis.By comparing and analyzing the seismic responses of the system and the traditional frame structure system under the same parameter conditions,it is concluded that the multi-story suspended floors system has good seismic performance;?3?After knowing that the seismic performance of this multi-story suspended floors system is better than that of the traditional frame structure system,in order to further optimize the main parameters such as hangar rod length,the mass of the suspended floor and the damping and stiffness provided by cushioning device,a case study is performed;At the same time,the hangar rod length of the two-story suspended floor was changed.According to preliminary parameter analysis,when the hangar rod length of the suspended floor m₁ was 0.7 m,the overall seismic performance of the multi-story suspended floors system was better.Then,parameter optimization analysis is performed for each suspended floor,taking l₁=0.7m,and changing l₂ to obtain the optimal l₂.It is found that taking l₁=0.7m,l₂ is greatly affected by different seismic waves.When l₂ is less than 1.1m,m₃ can achieve better vibration damping effect.Finally,the length of the boom is corresponding to the periodic ratio of each order of the system,and the relationship between the periodic ratio and the seismic response of each structure is analyzed;?4?After obtaining the optimal parameter value range of the hangar rod length of the two floors,a reasonable value will make the seismic performance of the suspended floor of this floor better.On this basis,the optimization analysis of parameters such as the mass of the suspended floor and the damping and stiffness provided by the cushioning device is performed and find the optimization law;...