Seismic Behavior Analysis Of Beam Type Transition Frame Structure In The Ground Fissure Site

The uneven settlement of the tectonic site causes the building to be inclined,cracked or even destroyed,and the method of avoiding the distance is usually used in the project.The study of the conversion layer structure of the ground is still relatively few.The beam size of the beam conversion structure is larger,and the stiffness near the conversion layer is prone to abrupt change,resulting in the phenomenon of "strong beam weak column".Therefore,this paper studies the performance of ground-beam conversion structure in Xi'an f6 tectonic field,and provides some suggestions for the design of structural structure of fractured area.In this paper,we study the following three methods for the three kinds of conversion position beam conversion structures:(1)Elastic analysis and Pushover analysis of beam conversion structures with different conversion positions;(2)For different avoidance distances,different transformations And the internal force and deformation of the beam structure are analyzed,and the deformation and internal force analysis of the ground structure of the ground floor and the common ground are analyzed by the combination of loads.Draw the following conclusions:(1)The higher the height of the transition layer,the larger the period of the structure,the smaller the stiffness,the lateral displacement of the structure,the increase of the displacement angle,and the maximum interlayer displacement angle in the transverse and longitudinal directions of the structure In the conversion layer and the upper and lower position,so the design should be on the conversion layer and the upper and lower parts to strengthen;(2)The structure of the different conversion layer is the upper layer of plastic out of the first hinge,after the conversion of the beam and the conversion column plastic hinge,the upper layer of the conversion layer hinge hinge,the conversion of the bottom of the hinge also began to yield,so the design should be on the conversion layer Upper beam,and the bottom of the conversion column to strengthen;(3)Under the condition of load combination,the maximum displacement angle of the structure of a scheme is within 15 m of the avoidance distance.In the range of 16m-19 m,the deformation within 50 years of the structure satisfies the specification requirements,and finally,The maximum design value adjustment coefficient of the internal force of the conversion layer structure is 50 years to meet the requirements of component bearing capacity.