Research On Effect That Eccentric Support On Seismic Responses Of Staggered Truss Structure System

Staggered truss structure is a newly economical structure that improves based on steel structure framework which is already exists.Eccentric support structure have good lateral stiffness and seismic performance,apply to the high-rise steel structure which has high seismic fortification intensity.In the eccentric support structure,energy consumption period is the most important part of the eccentric support.In order to study the length of the energy consumption period influence to eccentrically braced structure hysteretic properties and eccentric support influence to staggered truss structure seismic response,this paper analysis based on ANSYS finite element software:The results shows that:(1)the side column of no open layer truss bear bigger shear,and horizontal load cause more bigger lateral deformation;The whole structure uniformity force exertion,and have good lateral stiffness;(2)It is best broken model that energy consumption period of eccentric support structure give priority to shear yield.The better length of energy consumption period of monoclinic type and Y-shaped eccentric support is 750 mm and720mm;(3)Under the action of frequent earthquake,Staggered truss structure horizontal displacement change of uniform,interlayer displacement meet requirements.Article 3 the seismic waves,the Beiling Wave has the most influence to structure;(4)Under the rare seismic action;eccentric support can effectively control horizontal displacement of Staggered truss structure;Interlayer displacement and vertex displacement time history curve of the amplitude of two seismic amplitude response parameters were significantly reduced.Y-shaped eccentrically braced for independent of the energy consumption of beam influence on seismic response of the staggered truss structure is bigger.Monoclinic type eccentric supports have structural advantage.