The Seismic Performance Analysis Of Frame-core Tube Structure With The Steel Truss Of Diagonal Web Member Strengthened Layer

Strengthening layer has great effect on the reduction of high-rise building’s lateral displacement and inner tube bending moment under the horizontal load,thus increasingly become a high-rise building is the structure form.However with horizontal force strengthening layer structure itself is very complex,the earthquake force transfer path will change which cause floor stiffness mutation,Lead to weak layer structure.Ductility structure no longer development mechanism,therefore,may lead to the final collapse and destruction of buildings.The structure strengthening layer of the high-rise building is decorated with abdominal reinforced concrete beam as the main form.The diagonal web member steel truss type form is still little. Respecting this,So it is very important to study on the mechanical properties of the this structure.Based on general finite element software SAP2000,this paper designed the framework of a layer of 38 core structure,and establish a three-dimensional finite element model.Reasonably designed one and multiple strengthened layer.Then using the response spectrum to analysis the the modal,from the number and location of different layout of the structural strengthening layer,the paper compares various schemes under the horizontal force,floor displacement,layer displacement and angle drift of model,the change rule of the influence of the vertical component internal force,the distribution of bending moment of pillars and core tube.Horizontal strengthened layer reduce of lateral,the mechanism of the improvement of horizontal stiffness was analyzed.Determined the location of the oblique abdominal rod steel truss strengthening layer.Concerning this this article provides some reference and suggestions,which facilitate the design work about the strengthening layer structure in the future.