Composite pier anti-seismic reinforcement structure and construction method thereof

The invention relates to a composite pier anti-seismic reinforcement structure and a construction method thereof. The composite pier anti-seismic reinforcement structure comprises a cover beam and a bearing platform which are connected through pier columns, a plurality of vertical grooves are formed in the peripheries of the tops and bottoms of the pier columns, preformed holes matched with the vertical grooves are formed in the lower side surface of the cover beam and the upper side surface of the bearing platform, steel bars are arranged in the vertical grooves, and the steel bars extend into the preformed holes. Common concrete layers are arranged on the peripheries of the tops and bottoms of the pier columns, wherein the vertical grooves are coated with the common concrete layers, theouter sides of the common concrete layers are circumferentially coated with FRP cloth, pouring gaps are reserved between the FRP cloth and the common concrete layers, and the pouring gaps are filled with expansion concrete layers. The composite pier anti-seismic reinforcement structure and the construction method thereof have the advantages of simple structure, reasonable design and convenient construction, joint reinforcement is carried out by the implanted steel bars and FRP materials, the shear resistance bearing capacity, deformation performance, stiffness degradation, ductility, energy dissipation capacity and the like of a pier are improved to varying degrees, the anti-seismic vulnerability of the pier is reduced, a good fixing role can be achieved, and the structure can further be used for reinforcing the pier after an earthquake.