Analysis And Research On Energy Dissipation Substructure Of Viscous Damper

As the most common passive control method,energy dissipation is widely used in many domestic projects and has achieved remarkable results.Viscous damper is a kind of energy consuming device commonly used in energy dissipation technology,and has good energy consumption.In the energy dissipation structure,the energy dissipation substructure is a very important part,which is the main structural unit directly connected to the energy dissipating component.How to fully guarantee the substructure to play its function under the action of earthquake,it is very important to make the energy dissipation structure reach the performance target of expected shock absorption.Therefore,how to design the substructure and ensure the stable operation of the damper is an important issue.In this paper,the discussion and analysis are carried out,and the viscous damper damping design is studied.The stress analysis and design method of the substructure are discussed.The main research methods and conclusions are as follows:(1)Based on the single-mass point,multi-mass point and multi-mass sub-structure theory model,the nonlinear analysis is carried out.The most unfavorable internal force combination problem of substructure is explored from the factors of storage stiffness,loss stiffness,loss factor and additional damping ratio.The results show that for the energy dissipation structure with small loss factor,the most unfavorable moment of the internal force of the substructure can take the maximum moment moment,that is,the maximum moment of the analysis,which can save a lot of time.(2)Based on the above theoretical model,the influence of the beam-column plastic hinge on the overall structure in the substructure is analyzed.The beam and column members in the substructure are analyzed separately,and the direct connection type and the indirect connection type are used to study the additional damping ratio and base shear force.The analysis results show that for the columns in the substructure,it should be ensured that there is no plastic hinge,and for the beams in the substructure,it should be divided into two cases.For the beam in the direct connection type structure,the appearance of the plastic hinge has little effect on the damper function.For the beam in the indirect connection type structure,the appearance of the plastic hinge has a certain influence on the structure,and the hinge is not suitable.(3)In combination with engineering examples,the substructure design method proposed in this paper is compared with the full-time internal force envelope method.The results show that the calculation results of the two are basically consistent,and the calculation convenience of this method is greatly improved.