Seismic Response Analysis Of Multistory Suspended Floor Structure Based On OpenSees

As a special structural system,suspended building structure can give full play to the performance advantages o f high-strength materials,making the structure layout flexible and changeable,which can so lve the contradict ion between building funct ion and structural structure.In addit ion,the structure system has good wind resistance and seismic performance,taking into account the pract icab ilit y and art istic beaut y o f the building,and has good social and economic benefit s.In order to avo id the damage of the beam co lumn jo int o f the suspended building structure as much as possible,this paper proposes a new structure system of mult i-layer suspended floor,which only keeps the connect ion between the roof beam and the concrete co lumn,and sets the suspensio n po int of the suspended floor on the concrete co lumn,and increases the lateral st iffness of the structure system by the strut.In order t o study the seismic performance of a new t ype o f mult i-storey suspended floor structure system,this paper uses OPENSEES finite element so ftware to analyze the seismic response o f the system.The main research contents are as fo llows:(1)This paper introduces the structure o f the mult i-storey suspended floor structure,and deduces the mot ion equat ions o f the suspended structure in the case o f suspending one floor cover beam and two floor cover beams respect ively by using the Lagrange equat ion,and then est ablishes the mot ion equat ions of the structure in the case o f suspending mult i-storey floor by analogy.(2)Based on the finite element so ftware OPENSEES,the finite element models o f co mmo n frame and mult i-layer suspended flo or structure are established r espect ively.The select ion of concrete material,steel material and suspender material o f mult i-layer suspended floor structure,and the connect ion o f suspender node and floor and concrete column are introduced in detail.(3)Under the act ion o f three different seismic records,the seismic performance o f mult i-storey suspended floor structure and commo n frame is analyzed and co mpared.The results show that the mult i-storey suspended floor structure is better than the ordinary frame in seismic performance.B y changing the st iffness,damping parameter and suspender length between the cover beam and the concrete co lumn o f the suspended structure,and co mparing and analyzing the maximum story displacement,the maximum floor displacement,the maximum floor speed and the maximum floor acceleration o f the structure,the change rule of the seismic performance parameters of the mult i-layer suspended floor structure is obtained.(4)In this paper,the IDA analysis o f co mmo n frame and mult i-layer suspended floor structure is carried out,16 seismic records are input,the seismic intensit y records o f the structure are adjusted,the maximum inter story displacement angle of commo n frame and mult i-layer suspended floor structure is obtained,and then the IDA curve is drawn according to the data obtained.On this basis,the maximum inter stor y displacement angle of co mmo n frame and mult i-layer suspended floor structure is co mpared and analyzed The displacement angle shows that the mult i-layer suspended floor structure has goo d energy dissipat ion and self reset performance.