Optimization Design of an Irregular Out-of-code High-rise Structure Scheme
The frame-core tube structure is a prevalent system for high-rise buildings.To meet the multi-functional requiremnts of the building,a large hole is often created on the bottom floor to obtain a high hall.However,such openings in the floor can obstruct the horizontal force transmission within the structure and cause an abrupt change in floor stiffness,potentially making the structure become an out-of-code high-rise building structure.In order to eliminate the weak layer in the structure and improve its irregularity,in the light of the original frame-core tube engineering example,this research adopts a secondary structure formed by"the disconnecting through gap and setting columns"on the beam to adjust the original structural scheme.Under seismic fortification conditions of six and seven degrees,SATWE and MIDAS software were utilized to analyze the seismic performance of the two structural design schemes under both elastic and elastic-plastic conditions.Furthermore,the stress,deformation and plastic damage of structural members under earthquake were compared.Through a quantitative analysis concerning structural indexes,it is found that under frequent earthquakes,the structural scheme of disconnecting through gap and setting columns can effectively minimize the torsional deformation of the whole structure,control the abrupt changes in floor bearing capacity and improve the irregularity of the structure.Under the action of rare earthquakes,this proposed structural scheme can effectively alleviate the plastic damage degree of components and improve the seismic performance of the structure.This study can provide reference and design suggestions for the engineering structure design of similar buildings in low intensity area.
oversized high-riseseismic performance analysisirregular structuredisconnecting through gap and setting columns
万方数据
维普
