Seismic Design Method For Component Level Of High-rise Primary-secondary Structures Based On Prefabricated Joints Under Rare Earthquake

At present,structural plastic development is grasped from the conceptual design,such as strong columns and weak beams.It is impossible to obtain reasonable structural plastic development areas and paths.Structural plastic development areas are often concentrated and easily cause local collapse,making structural redundancy impossible fully utilized.For this reason,in this paper,the structural plastic development is planned by rationally arranging the prefabricated joints,so that the plastic energy dissipation of the structure is controlled in the designated area and has the characteristics of multi-stage.At the same time,the influencing factors of high-rise primary-secondary structures of multi-stage energy dissipation are analyzed.Finally,a seismic design method for component level of high-rise primary-secondary structures based on multi-stage energy dissipation under rare earthquake is proposed.Mainly include the following research work:Plastic development planning and analysis of high-level primary-secondary structures.By adjusting the stiffness and bearing capacity of plastic controllable prefabricated joints,the area and path of the plastic development of the structure were planned.Four high-rise primary-secondary structures of concentrated energy dissipation and multi-stage energy dissipation are designed,and the seismic performance,energy dissipation capacity and nonlinear resistance of four structures and traditional high-rise primary-secondary structure are analyzed by numerical simulation analysis.The plastic development of the multi-stage energy dissipation structure is progressive in different regions,which gradually releases the structural redundancy,increases the nonlinear resistance of the structure,and improves the seismic performance and energy dissipation capacity of the structure.Analysis of influencing factors of high-rise primary-secondary structures based on multi-stage energy dissipation.Regarding the stiffness ratio of the primary structure and the secondary structure and the structure energy dissipation stage division as the influencing factors of the high-rise primary-secondary structure of multi-stage energy dissipation,the adjustment method of the primary structure and the secondary structure stiffness ratio and the structure energy dissipation stage division is given.The seismic performance and energy dissipation capacity of high-rise primary-secondary structures with different influencing factors are analyzed.The reasonable stiffness ratio of primary structure and structural energy dissipation stage division provide a theoretical basis for the seismic design of high-rise primary-secondary structures.A seismic design of component level of high-rise primary-secondary structures based on multi-stage energy dissipation under rare earthquake.Clarify the seismic performance target of multi-stage energy dissipation structures.Considering the influence of the plastic energy dissipation of the expected energy dissipation components on the structural response,the equivalent linearization method is used to design the high-rise primary-secondary structures in stages.A seismic design method for component level of high-rise primary-secondary structures based on multi-stage energy dissipation under rare earthquake is proposed.The feasibility of the proposed seismic design method is verified through case analysis.