A New Type Of Disc Springs Self-Reset Energy Dissipator And Application Research In Structure

A self-reset energy dissipator is a new type seismic response dissipator with the function of energy dissipation and self-reset,this type of dissipator can not only play the role of ordinary brace and energy dissipator in the structure,but also can make the structure reset to its’ initial position,and can reduce or eliminate the elastic deformation of the structure after the earthquake process,which can effectively reduce or eliminate the residual deformation of the structure.Besides,the self-reset energy dissipator has the advantages of a wide range of applications,flexible arrangements and high economic benefits,which has become more and more scholars’ research projects and has been applied to the actual engineering structure.Although the self-reset energy dissipator has many advantages,there are still some shortcomings,such as complex structure,prestress losses and high installation accuracy.In order to solve the problem mentioned above,a disc springs self-reset energy dissipator is proposed in this paper.The main contents and conclusions of this paper are as follows:Firstly,a disc springs self-reset energy dissipator is proposed and designed,which is composed of the energy dissipation device,the reset device and the displacement transfer device.The structure composition,the working process and the design process of the disc springs self-reset energy dissipator is introduced.The theoretical mechanics models are set up respectively,including the energy dissipation device,the reset device and the disc springs self-reset energy dissipator.Secondly,the ABAQUS finite element software is used to model the disc springs self-reset energy dissipator,and the displacement amplitude loading is carried out.The experimental results and theoretical results are compared and analyzed.The results show that the two kinds of curves are in good agreement,which validates the rationality of the establishment of the finite element model.Thirdly,5 parameters of the disc springs self-reset energy dissipator are selected to analyze the energy dissipation and the self-reset performances using the ABAQUS software respectively,including bolt pre-tightening force,vertical spacing of pull bolt,thickness of H type slide main plate end plate,contact area of outer friction plate and circular inner sleeve wall thickness.Fourthly,the original steel frame structure,the steel frame structure with the disc springs self-reset energy dissipator and the steel frame structure with common brace are set up by SAP2000 software,and the response spectrum analysis are carried out respectively.The top displacement and interlayer displacement angle of the three structures are compared and analyzed.The results show that the disc springs self-reset energy dissipator has the best effect on reducing the displacement of the steel frame structure.Fifthly,under the action of two actual seismic waves and an artificial seismic wave,the time history analysis of the original steel frame structure,the steel frame structure with the disc springs self-reset energy dissipator and the steel frame structure with common brace are analyzed under frequent earthquakes,respectively.The structural top displacement and top acceleration of the three structures are compared and analyzed.The results show that the disc springs self-reset energy dissipator has the best effect on reducing the structural top displacement of the steel frame structure.Finally,under the action of two actual seismic waves and an artificial seismic wave,the time history analysis of the steel frame structure with the disc springs self-reset energy dissipator and the steel frame structure with common brace are analyzed under rare earthquakes,respectively.The structural top displacement and top acceleration of the two structures are compared and analyzed.The results show that the disc springs self-reset energy dissipator has the best effect on reducing the structural top displacement of the steel frame structure and the steel frame structure with the disc springs self-reset energy dissipator is more effective than the steel frame with common brace to reduce the seismic response performance of the steel frame structure.