Corrosion-resistant self-centering bridge pier structure easy for seismic rehabilitation

Abstract

The invention discloses a corrosion-resistant self-centering bridge pier structure easy for seismic rehabilitation. The self-centering bridge pier structure comprises a concrete bearing platform, prefabricated bridge pier sections, post-tensioned prestressed FRP (Fiber Reinforced Plastic) bars, bearing platform embedded bars, FRP connecting sleeves, anti-rust energy consumption bars, bracket lower nuts, bracket lower backup plates, brackets, bracket upper nuts, bracket upper backup plates, bracket reserved pore canals, a bearing platform reserved pore canal and an anchor, wherein the prefabricated bridge pier sections are placed on the downward concave part in the middle of the top surface of the concrete bearing platform; the bearing platform embedded bars are uniformly distributed around the downward concave part; the bearing platform reserved pore canal is arranged in the center of the downward concave part; and the prefabricated bridge pier sections are connected with the concrete bearing platform through the post-tensioned prestressed FRP bars. The structure has a self-centering function, the residual deformation of the structure is effectively eliminated or reduced, and the bottom of a bridge pier is protected through the FRP sleeves to prevent crush caused by local compressive stress.

Description

technical field [0001] The invention relates to an assembled reinforced concrete pier, in particular to a self-centering pier structure which is easy to repair after an earthquake and is corrosion-resistant. Background technique [0002] Earthquakes pose a serious threat to bridge safety. Under earthquake action, the pier-abutment connection is subject to large bending moment and shear force, which often becomes the weakest link in the entire structural system. The bridge piers are responsible for transmitting force and supporting the superstructure, and the failure of the connection between the piers and abutments will often lead to the loss of bearing capacity of the entire bridge, or even collapse. In addition, the post-earthquake repair of the pier-abutment connection is relatively difficult. Therefore, it is very important and meaningful to improve the connection method of piers and abutments. [0003] In the traditional cast-in-place bridge piers, the piers mainly d...

AI Technical Summary

Problems solved by technology

In addition, the energy-consuming materials are made of steel, which is easily corroded in the near-water environment due to the seams in the "dry connection"

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