Experiment Research Of Energy Dissipation Of T Steel Self-resetting Node With EPDM PAD

Although,steel structure building with its light weight,high stiffness,quick construction speed etc becomes the main structure form,but the traditional steel structure construction mainly rely on their own plastic deformation to dissipation the earthquake energy,produce very big residual deformation after the quake,and make repair difficulties and huge economic loss,reduce the residual deformation becomes the important factors that decide the steel structure if can adapt to the construction industry development trend,after the Northridge and Kobe earthquake,the self-centering steel structure solves this problem effectively,this kind of structure can be restored to its original position under seismic action,there is no residual deformation.Proposes a new type of automatic reset ability of beam-column joints with Ethylene Propylene Diene Monomer pad T shape node energy consumption that based on the self-centering steel structure of the research status and theoretical analysis.First of all,make thorough research about the new node through the existing self-centering steel structure,s beam-column joints research background,domestic and foreign research present situation and the prospects that the new node has carried on;Then,according to the literature,analysis the hysteresis curve of node model,and studied the concrete structure form of the node;After,taking a high-rise steel structure residential building of side column node as the prototype,make three 1:1 specimen model and make the low reversed cyclic loading test,analyzes the new node hysteretic performance,bearing capacity,stiffness and strength degradation law,etc.The results of the test indicate that beam-column joints with EPDM pad T shape node has good restoration capacity,and can protect main structure not be destroy.Then,ANSYS analysis was performed on the nodes,come to the initial prestress on the node from the reset performance plays a decisive role,the node's energy consumption is mainly composed of T section steel friction control,all specimens strength degradation and stiffness degradation is consistent,and structure has a good energy dissipation capacity.Through the study found that the new node hysteresis curve satisfies "flag form",energy dissipation capacity increases,the number of steel strand,initial stress and contact friction area,T steel are the key influencing factors for node.The new joints can better meet the stress and economic needs of steel frame.