Optimal Design For Seismic Response Reduction Of Low-rise Buildings Based On Viscous Dampers

Our country is an earthquake-prone area, collapsed houses are the important cause of casualties and economic loss in the earthquake, so the earthquake prevention and disaster reduction of building structures has been the focus of research. There occurred many destructive earthquakes in China, and rural areas are often affected seriously during the earthquake. These areas are relatively under-development in economy, and seismic capacity of buildings are relatively weak. As a result, structural damages were significantly higher than cities, and earthquake caused casualties and property losses are also more serious. Therefore, it is critical to study the seismic capacity of rural low-rise housings.First of all, the classification and characteristics of the viscous damper are introduced in this thesis, the model of restoring force of the viscous damper is analyzed, and the working principle of viscous dampers in the structure is discussed. Also, the seismic design of building structures are introduced, including the range of application, the objective of seismic fortification, the design of the main structure and the optimal distribution of dampers.The software ANSYS is used to establish a three-story frame structure, and the viscous dampers are evenly arranged in the structure. The seismic response is analyzed excited by El Centro wave and artificial wave to determine the weak parts of the structures, and viscous dampers are distributed in these key areas. Using different layouts of dampers, the displacement, inter-story displacement and acceleration of the structure in the two principal axes are contrasted, and the seismic performance of viscous dampers in the structure is verified. Compared with the traditional seismic design method, the energy dissipation devices are proved to be reasonable and effective by controlling the function of structure. It is expected that the results of this thesis can be able to provide some help and reference for structural designers.