Mechanical Properties Analysis Of A New Self-centering Energy Dissipation Brace

With the development of economy and society,the ability to reduce and quickly recover buildings has become the focus of architectural research.Based on guarantee of dissipating energy performance to reset structure,put forward a new type of self resetting energy dissipation,to analyze its structure and working principle,deduces the internal force,stiffness,formula of the yield displacement,yield load,and based on the software of ABAQUS to establish seven groups of different structures arc plate since the reset support consumption model,research the radian of arc plate effect on the properties of support,width,thickness,design method of supporting system by an example,based on pure steel frame and braced frame low reversed cyclic loading of numerical simulation,comparison and analysis to support ascension on seismic performance of frame structure.The main conclusions of this study are as follows:(1)The arc steel plate self-resetting energy dissipation support has good hysteretic performance,its hysteretic curve is in the shape of a flag and the shape is full,the stiffness of each section is flat and the performance is stable;(2)The design formula of energy dissipating element of arc steel plate is established.The maximum error between the calculated value and the simulation result is 16.7%.The theoretical analysis method is feasible;(3)When designing arc-shaped steel plate energy-dissipation components,the principle of first controlling the steel plate radian and width and then adjusting the thickness should be followed.The recommended values of the steel plate radian,width and thickness are: radian should be 1/250,width should be 50～80mm,and thickness should be 20mm;(4)The residual deformation of the component is mainly related to the initial prepressure of the disc spring.With the increase of the initial prepressure,the residual deformation of the support decreases.The maximum residual deformation of the component with the support is 3.75mm;(5)Established the design process of energy dissipation support.The numerical analysis of the steel frame with the support shows that the design flow of the energy dissipation support is reasonable and accurate,the resetting performance of the structure is improved by1.91 times,the energy dissipation performance is improved by 2.14 times,and the support has a great effect on the overall performance of the frame.