Study On The Seismic Performance Of A Super High-rise Frame-core Tube With Cantilever Corridors

Nowadays as the building height refreshed constantly,the diversified forms of architectural appearance and complicated structures,cantilever structures and high-rise structures are born at the right moment,so the research on the structure combined of the two becomes more meaningful than ever before.To study the seismic performance of high-rise frame-core tube structures with cantilever corridors,four models are established in this paper by using finite element software SATWE and ETABS based on a real project.Firstly,the parts beyond code limits of the project are summarized,and the response spectrum analysis of this structure under the frequent earthquake,as well as the elastic-plastic time-history analysis unde the rare earthquake were conducted.Secondly,the first example with cantilever corridors and the second example without cantilever corridors conducted were analyzed by using the finite element software SATWE and ETABS,to insure that the dynamic characteristics of the structures under the two softwares are the same so as to verify the validity of the models.Comparing response spectrum analysis results of the two structures under frequent earthquake,the changing laws of structural displacement and displacement angle in X,Y direction are acquired,which prove the cantilever corridors don't have a effect on the seismic performance of the structures;Finally,this article establishes the finite element model based on the three variables of the cantilever corridors,the story number of cantilever corridor and inclined strut types of cantilever part,selecting three seismic waves(including El,TAFT and artificial wave)to conduct the elastic-plastic time-history analysis under severe earthquake.By comparing the layer shear,interstory displacement,the interstory displacement angle and the displacement in Z-direction of the cantilever end,the effect of every variable on the structures' seismic performance under the action of elastic-plastic time-history are obtained.Finally,it suggests that the layout of cantilever corridor reduces the interstory displacement angle at the corridor level under rare earthquake.In addition,the story numbers of cantilever corridors and the types of inclined struts have little influence on the seismic performance of structures,but have obvious influence on the displacement in Z-direction of the cantilever tip.In this paper,the seismic performance of the super-high-rise frame-core wall structure with cantilever corridors is studied,which provides some basis for the design and extension of kind of structure.