In order to further promote the application of restorable prefabricated bridge structures with recoverable functions in medium and high intensity areas,reduce the post-earthquake damage and repair cost of bridge piers,a precast segmental concrete-filled steel-tube(CFST)bridge pier with external arched energy dissipation links was proposed.Based on the ABAQUS finite element analysis software,a four-section precast segmental CFST bridge pier model of four different structural forms(no energy dissipation link,external arched steel plate,external vertical steel plate,external arched energy dissipation link)was established,and the seismic performance of each model was compared and analyzed under reciprocating displacement loading.The results show that the precast segmental CFST bridge pier of the external arched energy dissipation link has better horizontal bearing capacity,higher initial stiffness and stronger energy consumption capacity.Compared with the precast segmental CFST bridge pier with the external vertical steel plate,the lateral bearing capacity of the precast segmental CFST bridge pier of the external arched energy dissipation link increases by about 11.9% ,and the initial stiffness increases by about 2.5% .Compared with the precast segmental CFST bridge piers with the external arched steel plate,the lateral bearing capacity,initial stiffness and energy dissipation capacity increase by about 28.8% ,4.6% and 13 times,respectively.Compared with the precast assembled CFST bridge piers without energy dissipation devices,the lateral bearing capacity,initial stiffness and energy dissipation capacity increase by about 39.4% ,10.4% and 18.1 times,respectively.Moreover,the residual displacement of the precast segmental CFST bridge pier with the external arch energy dissipation link is maintained within 1 mm in the whole displacement loading stage,and the offset rate is less than 1% ,which can improve the rapid recovery of bridge pier after earthquake.
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