Research On Seismic Performance Of A Super Tall-building With High-level Transfer Storey

A 53 storey super tall-building with high-level transfer storey is under construction in Shanghai. Its height is about 250m. The central RC tube and peripheral SRC frame with two outrigger trusses are employed to resist lateral as well as vertical loads. The height of the building clearly exceeds the stipulated maximum height of 190m for a composite frame/reinforced concrete tube building. Besides, it is classified as B grade complex tall building due to the strengthened storey and high-level transfer storey. Thus, the scaled model shaking table test and a refined FEM computation are required for a thorough understanding of its seismic behavior. In this study, FEM analysis to the structure was carried out by using ANSYS software on the basis of shaking table test.A refined finite element model is established according to the dimension of the shaking table model. Numerical simulation on seismic performance of the structure is conducted, the results are compared with the test data, analyzes the reasons of the differences, give suggestions for test as well as the model establishing and analysis of the prototype structure. On the basis of the model structure analysis, A prototype structure model is established, plastic pushover analysis is taken on the prototype structure model. It is shown that the structure can meet the requirements of earthquake resistance demands of the model structure and the prototype structure. Improved capacity spectrum method using inelastic demand spectrum and various ductility factors is engaged to investigate the target displacement of the structure subjected to seldom earthquake.Studies the working mechanism of the strengthened floor, further investigates the shear force and total moment distribution between the RC tube and mega-column under various earthquake magnitude and along pushover process. Find out the effect of the strengthened floor on earthquake resistance. Studies the impacts on seismic performance of establishing method of tube hole edge and the steel column at the tube corner. In the elastic stage, the steel column has almost no impact on the seismic performance of the overall structure. In the plastic stage, the impact is more obviously. Establishes a refined shear wall model, investigates the seismic performance of SRC wall is evaluated in these ways: deformation, stiffness and strength.