Research On Damping Performance Of High-rise Steel Frame Structure With Metallic Dampers And Viscous Dampers At The Same Time

Energy dissipation technology has become one of the main developmental directions in the research of earthquake resistant engineering, taking an extremely important part in structural vibration control technology. Experts and scholars all over the world in this field are not only actively committed to researching and developing this technology but also disseminating and applying it. As a new seismic design method, energy dissipation technology can effectively reduce the seismic response of structures to obtain good damping effects. So it has broad prospect in application.Although scholars at home and abroad have carried out researches in various areas to the damping properties of all types of dampers and achieved many results, however, existing studies are mostly with a single kind of damper in the structure and very few researches consider displacement associated damper and speed-related damper at the same time. In this paper, non-linear of structural material and connection units are taken into account to discuss the damping performance of high-rise steel frame structure with metallic dampers and viscous dampers at the same time.On the one hand, the elastic-plastic time-history analysis is made to one 15-layer steel frame structure with metallic dampers and viscous dampers at the same time under frequently occurred and rarely occurred earthquakes by finite element software SAP2000, using two typical natural and one artificial seismic waves. All dampers are arranged in two side spans of horizontal layers of the frame, with five floors as a unit to consider. So a total of six analysis of working conditions are delimited. Damping effects of different conditions are discussed by comparison with the earthquake response, including the maximum displacement of each floor,the maximum inter-story drift angle,the maximum inter-story coefficient of shear and so on. On the other hand, from the economic point of view, this paper discusses how to control the lateral displacement of high-rise steel frame structure effectively with fewer dampers, and control the response of the maximum velocity of each floor,the maximum inter-story drift angle and so on to a certain extent.It can be indicated from the research that: when metallic dampers and viscous dampers are used together for vibration control, they can not only work well and reduce the value of seismic response of structure, but also control the earthquake response in the ideal range through reasonable adjustments to their relative location and numbers. At the same time, the lateral displacement can be well controlled at all levels when dampers are set up in the lower 2/3 floors of structure, thus achieves better economic benefits. The conclusions from this paper can provide useful reference for further study of such questions and also provide a new way of thinking for energy dissipation technology.