Seismic Performance Analysis Of Steel Frame-Core Tube Hybird Structure With Buckling-Restrained Braced

In recent years, with the continuous development and innovation of the theory and system of China’s construction technology, calculation, steel-concrete composite structure system can play of steel structure and reinforced concrete structure, many other advantages, has been more and more used in high-rise buildings. Which is well mixed structure of steel frame concrete core tube, in the structure of the system, horizontal load is mainly formed by the reinforced concrete shear wall tube body to bear, including wind load and horizontal seismic force and vertical load mainly composed of steel frame bear. Due to the core shear wall layout is more concentrated, often appear lateral stiffness distribution is not balanced, therefore, to consider in the layout of the appropriate support framework to solve the problem of horizontal displacement gauge, the all kinds of support applied research and steel frame concrete mixed structures of engineering design has practical application value.The to the actual engineering application background of established steel frame-core tube hybrid structure model and in the steel frame are respectively arranged to support the ordinary and buckling restrained brace, analysis of the damping effect on the structure of the hybrid system. The mixed structure system and its calculation method are introduced in this paper. The principle and structure of the buckling restrained brace are introduced. Study, first support is arranged on the structure of the weak axis direction (Y direction), through SATWE, yjk and ETABS software were established the original structure, common support structure and model structure of BRB, of three kinds of structures were modal analysis, response spectrum analysis and time history analysis, the dynamic characteristics and the layer between angular displacement parameters, and carried out a comparative analysis of seismic performance of the same structure in different support.By comparing the three options found after adding to common support structure increases the stiffness of the weak axis, becomes the second order for the reverse translation, changing the original reverse the irregular structure. The results show that, similar to ordinary BRB supported under the action of multi-earthquake performance, only additional lateral stiffness; in rare earthquake, the BRB start hysteretic energy, compared with ordinary support, interlayer greatly reduces the displacement, reduction rate of 27.50%, to meet regulatory requirements. However, strengthening the weak axis but also changed the ratio of the relative strength of the lateralstiffness of the shaft, such that the displacement X direction under the action of some seismic wave but there is a tendency to increase. Thus, the design of the project, the support structure should be along two axis directions are arranged to prevent the transformation of the strength of the shaft and the other. Research methods and results of this paper BRB engineering applications and hybrid structure with a reference value.