A Seismic Analysis O High-rise Frame-Core Tube Structur

Modern society is entering an era of rapid development, which will inevitably lead to the development of population urbanization in China. For the number of buildings is also more and more in our country. High-rise buildings in recent years is the rapid development of urbanization, land resources nervous, commercial society a kind of inevitable trend. High-level framework of reinforced concrete structure of the core tube as a common form of a structure in high-rise buildings, is in conformity with the Chinese contemporary conditions, is also a kind of structure form of the present application more. Reinforced concrete structure with high intensity, large stiffness, low cost, the advantages of good fireproof performance, the stress of the frame core tube structure form has certain similarities with frame shear wall, but it’s more flexible layout, can satisfy the use of large space, daylighting is ventilated compared to other structure is better also. In this paper, the structure form of elected core tube of the reinforced concrete frame structure.This paper use ETABS program large finite element software design of 3 d modeling, engineering and use ETABS program software for structure vibration mode decomposition response spectrum analysis and elastic time history analysis. In vibration mode decomposition response spectrum method, the structure of the top six order vibration mode according to the natural vibration period of structure, used to analyze the structural modal participation and structure response relationship. And the structure in the unidirectional and bidirectional under the action of two kinds of seismic load conditions for seismic analysis of structures. In the analysis of the elastic time history analysis, the selection of three waves, EL CENTRO earthquake wave, the TAR TARZANA waves and an artificial wave-a wave of tangshan, under the action of the structure in three kinds of seismic waves for structural seismic analysis. And then compared the decomposition response spectrum analysis and elastic time history analysis of the results.