Application Research Of Concrete Filled Steel Tube Frame-Composite Shear Wall In High-rise Buildings

Composite column of concrete-filled steel tube and combined shear wall has the advantages of high bearing capacity and good seismic performance. If they are combined for usage, the complementary advantages are obvious so that the structure system of concrete-filled steel tube frame-combined shear wall is formed. Compared with the previous structure of concrete-filled steel tube frame-combined shear wall, the structure can effectively reduce the section size of the vertical force component and reduce the weight of the structure so as to facilitate the reasonable layout of functions of construction. At the same time, it also decreases the construction cost of main structure and foundation engineering, which brings a certain amount of economic interest.This paper carries out the application analysis of concrete-filled steel tube frame-combined shear wall in high-rise buildings. It is of great practical value to study the seismic performance of structures. The main work and research results of the paper are as follows:this paper takes the Jing Hui building in Jinzhong City, Shanxi Province as the engineering background to carry out application research of concrete-filled steel tube frame and combined shear wall in high-rise buildings with the stress characteristics and the calculation method of bearing capacity being discussed as well. Then it puts forward the new concept of concrete-filled steel tube frame and combined shear wall of grid type and double steel plate and studies the rationality and superiority of seismic performance of concrete-filled steel tube frame-combined shear wall. This paper carries out the discussion of the seismic analysis method of high-rise buildings especially the pushover analysis method. It makes detailed analysis of the operation process and implementation steps of capacity spectrum method and target displacement method in pushover. Furthermore, the horizontal loading mode is adopted to carry out comparative analysis in the pushover analysis process. The discussion on the practicability of seismic analysis of the structure system of concrete-filled steel tube frame-combined shear wall is made as well.By combining the practical projects, the paper makes the selection and arrangement analysis of the concrete-filled steel tube frame-combined shear wall of steel reinforced concrete. It adopts the PKPM and ETABS structure design analysis software to establish the finite element model to make comparison, analysis and research of the cycle, displacement layer, inter-layer displacement angle and other seismic parameters of the building affected by earthquake so as to verify whether the overall structure can meet the seismic requirements when earthquake happens frequently. At the same time, the supplementary calculation of the elastic time history is carried out by ETABS, which provides an effective seismic analysis and application judgment for the whole structure when earthquake happens frequently. It makes analysis and study on elastoplasticity of structural static of PKPM structure model of finite element affected by rare earthquake with the EPDA&PUSH of PKPM is adopted to carry out dynamic time-history analysis of elastoplasticity. What is more, the pushover analysis method is adopted to carry out analysis of seismic performance of the building in rare earthquake situation with the pushover relation between capacity spectrum and demand spectrum of the building being analyzed and studied as well so as to verify that the concrete-filled steel tube frame-combined shear wall of steel reinforced concrete has good seismic performance if it is used in high-rise buildings. Finally, seismic performance analysis of the new structure of the concrete-filled steel tube frame and combined shear wall of grid type and double steel plate is carried out. The study shows that the new structural system has better seismic performance and good application prospect.