The Saigao International Square Office Building Of Xi’an Design And Research Of Hybrid Structure System

After town housing system reform carried out in the late20th century, China’s realestate industry began to develop rapidly, urbanization process accelerated and the urbanpopulation concentrated highly, resulting in the high-rise building structure rapiddevelopment. As a new structural system, hybrid structural system has achieved rapiddevelopment in the domestic application of tall and super-tall building structure inrecent years. Compared to concrete structure, mixed structure own bigger stiffness,smaller cross section size, better structure stress performance and faster constructionspeed; While compared with pure steel structure, hybrid structure has less steel weightwhich result in low cost, good fireproof performance and better comfort under the windload action. Hybrid structure has become a hot spot of the high-level architecture inmodern urban construction. It is very important to design aseismic of high-rise structure,because workers and wealth in the high-rise building are highly concentrated, onceencountering earthquake will bring a devastating disaster. Xi ’an SaiGao square officebuilding of adopted structure of steel reinforced concrete frame and reinforced concretecorewall. This paper will analysis and study the seismic performance of high-rise mixedstructure in combination with the practical situation of Xi ’an SaiGao square officebuilding.Using PKPM/SATWE and MIDAS/BUILDING to established the threedimensional space structure calculation model and compared&analysed the calculationresults, respectively. Disscused mixed structure design, calculation, formation based on the specification.Using MIDAS/BUILDING to analysis Pushover of structure under severeearthquake; Taking uniform acceleration loading model to studied the initial loadcondition and base shear, maximum interlayer displacement, maximum elastoplasticinterlayer displacement angle and plastic hinge distribution to found out the weak partsof the structure in the direction of X&Y under earthquake action and analysised thefailure mechanism of structure.Seven seismic waves were selected to conduct elastic time history analysis underfrequent earthquake, compared the results with CQC. Three seismic waves wereselected to take elastic-plastic time-history analysis under unusual earthquake, andobtained story shear, story drift, the bearing capacity of member, and the hinge order,the hinge type of reasonable structure, verifying the seismic performance of structure“strong column&weak beam” and “strong shear capacity&weak bending capacity”.The design methods and requirements of structure performance and the possibledamage state&the possibility of continue to use under the practical engineering inconfronted with various levels of earthquake were discussed. Finally, whether thestructure meet the seismic performance goal was verified.