Seismic Behavior Analysis Of Energy Dissipation Rocking Self-reset Steel Frame

In the field of civil engineering,the seismic ability of a structure is one of the important symbols of its safety.The research shows that the bottom of the frame structure is prone to interlayer yield failure due to the large deformation in the earthquake,and it is difficult to achieve the goal of "strong column and weak beam".Therefore,in order to improve the seismic resistance of the structure and improve the failure mode of the structure,the frame structure is converted into a swing frame,and the viscous damper and prestressed steel strand are installed in the swing frame to coordinate the work.The energy dissipation capacity of the whole structure is improved by the viscous damper,and the reset function is realized by the prestressed reinforcement to reduce the deformation of the structure.So as to meet the "small earthquake is not bad,in the earthquake repairable,big earthquake does not fall" seismic target.The main research contents of this paper are as follows:(1)The dynamic characteristics of the swing frame with spring support are derived theoretically.By comparing the numerical model of the steel frame with spring support and fixed support,the maximum inter-story displacement Angle under the action of small,medium and large earthquakes are studied to study its seismic performance.(2)In order to improve the energy dissipation capacity of the swinging steel frame,viscous damper is installed in the swinging steel frame.The damper parameters were determined by displacement-based aseismic design method,and the aseismic performance of energy-dissipated swaying steel frames under small,medium and large earthquakes was studied based on the maximum inter-story displacement Angle,story displacement and energy distribution.(3)The prestressed steel strand is set in the energy dissipation swinging steel frame to realize self-reset and reduce the residual displacement.Based on the maximum interlaminar displacement Angle and laminar displacement,the effect of self-reset was studied.(4)The seismic performance of steel frame structure,energy dissipated swing steel frame and energy dissipated swing self-reset frame is compared and studied to verify the overall effect of the improved frame.