Analysis Of Seismic Performance Of Super High-rise Building With The Frame-core Tube Structure Based On Shaking Table Tests

In order to study the dynamic response and seismic behavior of super-tall frame-core tube structure under earthquake,a scale of 1/50 scale model is established and the dynamic response of the structure under three kinds of seismic waves is tested by shaking table test,and the dynamic characteristics,dynamic response and failure mode of the structure are obtained.The main work and results of this paper are as follows:1.based on shaking table test,dynamic elastic-plastic analysis of frame-core tube structure is carried out by using large-scale nonlinear finite element analysis software MSC.Marc;The feasibility of the model is proved by comparing with the shaking table test.2.Based on modal analysis,the nonlinear seismic analysis of the structure is carried out by using time history analysis method.Three different seismic waves are input to the structure,and the displacement angle,vertex horizontal displacement,top level acceleration,and plastic hinge of stress layer are calculated.Under the action of three different seismic waves,cracks appear in concrete layers at the bottom of the structure tube,but the peak strain of concrete is not reached.The core tube structure partly succumbed,but no damage occurred.The plastic development of the core-tube structure is similar to that of the frame structure,which indicates that the core-tube structure has a good synergistic effect with the core-tube part.3.The results show that the torsional effect of the structure is not obvious under the action of seismic wave,and the displacement angle between the layers of the structure is mainly distributed in the bottom layer of the structure,and it meets the limitation requirements of the code for the lateral displacement between the layers,which indicates that there is no obvious weak layer in the structure.Under the earthquake of M=8,the whole structure meets the seismic requirements.And the outer frame also has enough seismic bearing capacity to play the role of the second seismic line.The results of this study have important theoretical reference significance in the feasibility of seismic performance of high-rise frame-core tube structure.