Study On The Seismic Behavior Of The Floor With Openings In The Super High Rise Frame-core Tube Structure

With the development of social economy and science technology, the architectural structure and height of high-rise buildings are developing continuously. Because of the rise of height, the bearing from horizontal load(seismic action, wind load) has a significant increase accordingly. The fame-core tube structure has reliable dual lateral resistant system, which can resist the horizontal load effectively. Therefore, this structure has been applied to super high-rise buildings extensively around the world.To fulfill people’s operating requirement(entrance hall, hanging gardens,shared space, aerial meeting room), Some of the buildings with the structure of frame-core tube have a common situation of openings in the floor. So it is quite important to choose appropriate method for seismic behavior analysis, and make the design of reliable and economical structure by using applicable details of seismic design. The research on the frame-core tube structure in the area with 6 degree of seismic intensity is as follows:Using Midas Building(finite element analysis software) to do a static elastic calculation for models in different ratios, positions, shapes with opening in the floors, and analyze the influence on dynamic characteristic and displacement responses. Then, making a rational performance goal by using the theory of performance-based seismic design, and doing the push-over analysis. Through the push-over analysis, get the performance points of structure and the process of plastic-hinges, analyze the effect of opening in the floors on structural ductility.Via the models calculations and comparative analysis, the influences on seismic performance caused by opening ratios, opening positions and opening shapes have been found. We can have the conclusion that this structure can satisfy the anti-seismic requirement—“undamaged after a mini earthquake, repairable after a medium earthquake, still standing after a great earthquake”. At last, some meaningful advises have been given for the optimization of anti-seismic design.