Steel Truss Level To Strengthen The Steel Framework Of The Layer - The Core Tube Structure Analysis Of Mechanical Properties Of Elastic-plastic Power

As the growing demand for high-rise buildings increased on account of human social activities, many countries have springing up a large number of high-rise buildings. Because of the growing height of the building, the influences of wind loads and seismic loads on structure are growing. In recent years, in order to control the lateral movement of high-rise buildings under lateral loads, strengthening story is often used in various kinds of structures. Strengthening story structure have obvious advantages of decreasing the lateral movement of high-rise buildings under lateral wind loads and lowering the core tube structure bending moment. But the application of strengthening story is limited; too many settings of strengthening storys and excessive stiffness of strengthening storys affect the seismic performance of high-rise buildings. So the appropriate settings of the number of strengthening storys and their stiffness are the key to research the working mechanism of the strengthening story.1.In this paper, according to the principle of collaborative works of steel-frame concrete core wall, an universal structure program which suit the high-rise structure framework, framework-core tube, framework-core tube with strengthening storys has been writen.2.Through the universal structure program by contrast the displacement reaction of different stiffness, different places, different numbers of strengthening story structure and not set strengthening story structure under wind load, The paper obtain the optimal position of the strengthening story structure and the influence of lateral movement by change the stiffness and the position of strengthening story:By increase the single-story stiffness structure to reduce the Lateral displacement without increasing the number of strengthening story is not obvious than increasing the number of strengthening story; and with the strengthening story stiffness increases, the effect of reducing the amount of lateral displacement is not obvious. Finally author drawing the curve of the "Strengthening of the story stiffness, the number of lateral relations with the story to reduce the rate curve", by the curve can choose the optimal number of storys to enhance the stiffness of the arrangement. By comparing the different stiffness of different settings to enhance the number of storys and story structure is not set to enhance the shear and bending moment, get a different stiffness, different number of storys to strengthen the framework of the force cylinder performance.3.Through the ANSYS modal analysis by set strengthen story and un-strengthen story structure, obtain Free vibration Period and Structural vibration mode. Learn more about strengthening story on the structure period and structure modes.4.Through the use of plastic building structure dynamic analysis with special software EPDA, different structure of set and not set strengthen story and un-strengthen story structure three-dimensional structure of 7,8, 9, Earthquake plastic dynamic analysis, the main direction of the seismic response of the peak displacement, acceleration versus time and maximum floor displacement of song and story drift angle curves along the floor, And through further analysis of four types of plastic hinge distribution to understand the structure of the failure mechanism under earthquake:Strengthening layer helps to reduce weight and increase the structure of the horizontal displacement capacity of ductile failure, but the effect of multi-channel enhancement layer is not obvious.