A Improved Kasai Design Method For Soft Steel Damper-Shear Frame Structure

The traditional seismic design is mainly aimed at the three-level and two-stage specified in the specification,that is,“the small earthquake is not bad,the medium earthquake can be repaired,and the large earthquake does not fall”.Resist the earthquake by the stiffness,strength and ductility of the structure itself.In today’s high-level living environment,this method is not only difficult to ensure the safety of the structure,its comfort and economy are also poor.Energy dissipation technology is a passive control method that resists the seismic energy of an input structure by providing a damper in the building or by designing certain components of the structure as devices that dissipate energy.Due to its energy-consuming ability,wide application range and cost-saving,energy-absorbing and shock-absorbing technology has been highly valued by researchers all over the world.In addition,several major earthquakes occurred in the international community in recent years,causing serious The loss of life and property,this paper has carried out in-depth research on structural energy dissipation technology.The main contents and research work of this paper are as follows:1.Briefly introduces the types of dampers commonly used in energy dissipation design and their working principles and characteristics,and summarizes the existing energy dissipation design methods at home and abroad.2.Based on the design method proposed by Japanese scholar Sakai Kazuhiko and others,combined with the acceleration response spectrum given in China’s seismic code,the shock absorption performance curves under different site types and earthquake groupings are drawn;3.Based on the premise that the first vibration mode of the structure is a fold line,the calculation formula of the additional system elastic stiffness of the multi-layer structure is deduced to determine the number of dampers and related parameters in the multi-degree-of-freedom structure design.4.Taking a 6-story reinforced concrete frame structure as an example,the energy dissipation and shock absorption design of the soft steel damper is applied by the design method proposed in this paper,and the feasibility of the design method proposed in this paper is demonstrated.