| With the urbanization process in our country,super high-rise building gets continuous developed as it has the following advantages: Saving land resources;Providing a platform for cultural and economic activities;Promoting the development of construction technology;Consummate city function and so on.However,the adverse effect of earthquake on the building becomes more and more obvious,along with the increase of the height of super high-rise architecture,which puts forward higher demand of structural lateral resistance.As a new type of build component,the steel plates and concrete of the double steel plate concrete composite shear wall has mutual restraint between them,which makes the double steel plate concrete composite shear wall exhibit good ductility and good energy dissipation capacity under earthquake actions,and it makes it possible to optimize the destination of "high axial pressure,high ductility and thin wall" of super high-rise shear wall.At present,the domestic research on double steel plate concrete composite shear wall mostly focuses on the single wall’s mechanical performance,while the seismic performance of super high-rise frame-core tube structure formed by double steel plate concrete composite shear wall still lacks sufficient research.This paper takes a 216 m high super high-rise project as an entity example.The main body form of the project is a frame-core tube structure with a core tube size of21.5m13.6m and an outer column distance of 9 m.The sizes of the core tube and the outer frame are unchanged,design for different reinforcement layer arrangement schemes,and establish a comparison model.Research indicates that provide the four refuge layers equally with reinforcement layers,and design a Y-directional ring trusses with the first,second and fourth reinforcement layers,and a bidirectional ring trusses with the third reinforcement layer,which can effectively control the lateral movement of the structure,ensure the utilization rate of internal space and improve the economy efficiency.YJK software is used to carry out elastic analysis of the structure.The indexes such as period,misplacement angle,shear weight ratio and axial compression ratio show that the structural design meets the requirements of bearing capacity.Based on the above-mentioned optimization scheme,In view of the transfinite of the structure studied in this paper,Pushover analysis and elastic time history analysis are carried out on the structure with YJK software to evaluate the seismic performance level.The results of elastic time-history analysis results pave the way for the subsequent use of SSG high-performance elastic-plastic dynamic time-history analysis software.According to the results of elas-to-plastic dynamic time history analysis results,evaluate the seismic performance of the structure at the overall aspect and component aspect under small,medium and large earthquakes.And compared with pushover analysis results.According to the criterion of structural seismic performance level in "Technical Code for Steel Structures of High-rise Civil Buildings"(JGJ99-2015),the structure damaged in a light to medium degree under the action of moderate earthquake,and severely damaged under the action of strong earthquake,but do not exceed the limit value of displacement angle.It turns out the structure meets the design principle of "small earthquake no damage,medium earthquake can be repaired,and large earthquake will not fail".When under strong earthquake actions,severely damage is happen on the frame beam,and the frame column is not appear the severely damage,its meets the design requirements of strong column and weak beam.The final severe damage degree of the core tube is 8%,which indicates that the core tube composed of double steel plate composite shear wall has play a good role in ductility in the earthquake resistance of super high-rise buildings meets the code limit,and the entire earthquake resistance of the project meets the requirements. |
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