鋼—混凝土混合結(jié)構(gòu)減振振動(dòng)臺(tái)試驗(yàn)分析
[Abstract]:Earthquakes often cause more casualties and damage to buildings. The traditional seismic design and isolation design are different in how to resist the damage to buildings. The former aims to prevent the collapse of buildings and to ensure the safety of human beings. The damage of the structure absorbs the seismic energy when a large earthquake occurs, but the deformation of the superstructure often results in the destruction of the house interior items and casualties. The latter aims at no damage to the superstructure during a large earthquake, and almost all seismic energy is absorbed by the isolation layer, which makes the superstructure work in an elastic range, which not only prevents the structure from being damaged, but also effectively protects the objects in the house. In recent years, scholars at home and abroad have made many researches on the structures with isolation bearings or dampers, and have made many achievements. However, there are few researches on the isolation support and dampers in the structure at the same time. The main contents of this paper are as follows: (1) the history and present situation of the technology of laminated rubber isolation and viscous dampers are briefly described. Characteristics and application in engineering, performance, analysis method and the basic principle of viscous damper of rubber isolation bearing are expounded. The mechanical model and the analysis method and calculation method of the structure with viscous dampers. (2) A two-story hybrid structure with concrete and steel structure is designed and fabricated. The seismic structure is subjected to different seismic waves. The vibration table tests of isolation structure and damping structure are carried out, and the acceleration, displacement and strain values of different structures are tested. (3) the seismic performance of seismic structure, isolation structure and damping structure are compared and analyzed. After the isolation support is installed, the period of the structure is effectively prolonged, the acceleration and the interstory displacement are obviously reduced, and the damping effect is remarkable, and the lateral stiffness and damping of the superstructure increase after the viscous dampers are added to the isolated structure. The acceleration of the top layer and the displacement between the layers are obviously reduced, but the amplitude of the acceleration of the isolation layer is not obvious, which indicates that the setting of viscous damper increases the energy consumption of the earthquake. But the damping effect is also closely related to the location of the damper. (4) the finite element model of the experimental structure is established by using the elastic-plastic theory, and the time-history calculation of the model is carried out by using Midas Gen, and the finite element analysis is compared with the experimental results. The comparison and analysis show that the results of finite element analysis are in good agreement with the test, which shows that the finite element analysis can simulate the practical problems of engineering well, and it is feasible and effective.
【學(xué)位授予單位】:中南林業(yè)科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TU398.9;TU352.1
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