STUDY ON THE SEISMIC PERFORMANCE OF THE EXTERNAL PRESTRESSED SELF-CENTERING FRAME WITH PUSHOVER ANALYSIS

Seismic performance of EPSCF (External Prestressed Self-centering Frame) structure is investigated with the method of Pushover analysis. The finite element model of EPSCF structure is established and verified by shaking table test. Then Pushover analysis is adopted to study the seismic performance of EPSCF structures with/without dampers. Finally the seismic responses of these structures are compared. Results show that the installed dampers improve the seismic performance of EPSCF structures as the following: the damping ratio of EPSCF structure with dampers is greatly increased; compared with the conventional RC frames, the earthquake energy is dissipated mainly by the yielding of dampers instead of the plastic deformation of frame components; structural acceleration and displacement responses are effectively controlled.