Study On Seismic Behavior And Design Theory Of Energy-Dissipation Braced Frame Structures

The energy-dissipation braced frame structure,which forms by means of adding energy-dissipation brace in span of pillars, is a new kind of energy-dissipation structure developing in recent years. This kind of structure is not to adopt the traditional thinking of "strengthen" structure, but to dissipate a great deal of earthquake energy by the non-elastic distortion of the energy-dissipation brace system, reduce seismic response of structure greatly, consequently, ensure main structure safety in strong motion, so the energy-dissipation braced frame structure is a kind of structure that is safe and economic. A variety of energy dissipation systems have been developed at present, such as friction dampers, metallic dampers, visco-elastic dampers and viscous dampers.In this thesis, the common dampers and their restoring models are introduced, based on it ,a frame structure model and a energy-dissipation braced frame structure model are established respectively and analyzed in the way of static elastic-plastic by general finite element program ANSYS, and the anti-seismic behaviors of energy-dissipation braced frame structure are studied. The result shows that not only excellent displacement stiffness but also favorable energy-dissipation ability are obtained by adding energy-dissipation brace system in span of pillars. At last aseismatic design method is studied in-depth, some original conclusion and advice is attained, the foundation is provided for application of energy-dissipation braced frame structure.