Study on Seismic Performance of a Super High-Rise Building Based on the Rare Earthquake

Abstract

With the development of the architecture science, the super high-rise building in highly seismic region is growing, and its height is also increasing. Designing new kind of super- rise structure system, and checking its safety and reliability are the tasks for structure engineers to challenging. This paper assumes that in the highly seismic region, takes giant framework super-tall structures as example, and tests the deformation, stress and damage conditions of the structure under seismic affection. This structure system is consisted of mega steel frame and steel plate shear wall core tube, by setting up outside cylinder conversation truss and huge brace, the steel amount is decreasing effectively, in the condition of ensuring the overall stiffness to resist lateral force. The analysis result shows: In the effect of rare earthquake, the outside cylinder frame forms the hinge mechanism gradually, which play a good effect of energy consumption, Shear wall concrete damage seriously. In the condition of considering the elastoplastic material, the maximum interlayer displacement angle of the structure satisfies the 1/100 limitation requirement, the structure meets the "don't collapse under the rare earthquake" fortification criterion. structure system is giant frame - core tube, the plane of the structure is square. Bottom dimensions of the structure is 78m× 78m, middle size is 54m× 54m, and slightly enlarged up from the middle to the top, but the top size is smaller than bottom size, approximately 69m× 69m. The exterior wall thickness of reinforced concrete core tube gradually change from 1200mm to 300mm by first floor to the 101 floor, from 102 floor to 108 floor, the thickness of the wall increase from 300mm to 400mm, the thickness of the interior wall changes gradually from 500mm to 300mm, from the first floor to the top. In order to improve the axial compression ratio of the bottom wall, the ductility of reinforced concrete and reduce the thickness of the wall and weight of the structure, the interior and exterior wall from first floor to 57 floor, the interior wall from first floor to 55floor use the steel plate shear wall. The concealed columns of remaining floors are embraced with steel. The structure lateral force, structure model and resistance system are shown in fig. 1~fig. 3.