Analysis On Interstory Anti-collapse Behavior Of Composite Frame Substructure With Friction Energy Dissipation Connections And Partial Self-Centering

Self-centering structure has become the main object of anti-seismic studying.Self-centering structure is composed of main forcing component.This structure can reduce damage,control residual deformation and reduce the cost of maintaining.This article mainly studies anti-collapse performance of innovative crimping PEC column and steel beam with friction energy dissipation and partial self-centering structure.Different with common self-centering structure which sets continuous post-tensioned bar,this structure sets partly pretension bar in steel beam which meet self-centering function,the capacity of energy dissipation,safety stock.Studying results can expand the theory of innovative crimping PEC column and steel beam with friction energy dissipation and partial self-centering structure and be a reference for future research.To study interstory self-centering function,energy-dissipating capacity and stress mechanism of innovative crimping PEC column and steel beam with friction energy dissipation and partial self-centering structure.The rationality of the method to build the finite element model was evaluated by the test.Later,according to following test specimens,some design parameters as pre-force of pre-tensioned bar,the location of bolts in T-stub,the length of hole with T-stub,friction force,stress on PEC column and location of pre-tensioned bar were considered to build nine specimens by using ABAQUS under low-cyclic loading.Results show:1)Specimen whose T-stub connected with PEC column on one side had large outside deformation,which delaying the progress of friction energy dissipation;2)Different forces of pre-tensioned bar affected the performance of energy dissipation and self-centering function;3)Increasing fiction force can enhance energy dissipation but reduce self-centering function;4)The length of hole in T-stub mainly affected carrying capacity and self-centering function;5)Stress on PEC column had little influence on specimens;6)Location of pre-tensined bar affected carrying capacity and self-centering function;7)When the angle of displacement reached 0.035 rad which exceed the story displacement limit of large earthquake 1/30,all residual drift angle were less than0.005 rad,the specimens own superior self-centering function.